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1. Investigating emission-line galaxy surveys with the Sloan Digital Sky Survey infrastructure

Author

Claudia Maraston, F. Lamareille, Johan Comparat, Jian Ge, Daniel Thomas, David J. Schlegel, Alexie Leauthaud, Stephanie Escoffier, Anne Ealet, Will J. Percival, Adam S. Bolton, Stephen Bailey, Joel R. Brownstein, Jean-Paul Kneib, Jeremy L. Tinker, Donald P. Schneider, Kyle S. Dawson, Julien Zoubian, Nick Mostek, Nicholas P. Ross, Éric Aubourg, Oliver Steele, C. Schimd, Benjamin A. Weaver, and Olivier Ilbert

Subjects
Physics, 010308 nuclear & particles physics, Standard ruler, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift survey, 01 natural sciences, Galaxy, Cosmology, Redshift, Metric expansion of space, Space and Planetary Science, Observational cosmology, 0103 physical sciences, Baryon acoustic oscillations, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

The Baryon Acoustic Oscillation (BAO) feature in the power spectrum of galaxies can be used as a standard ruler to probe the accelerated expansion of the Universe. The current surveys covering a comoving volume sufficient to unveil the BAO scale are limited to redshift $z \lesssim 0.7$. In this paper, we study several galaxy selection schemes aiming at building an emission-line-galaxy (ELG) sample in the redshift range $0.6

Published
2012
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2. Reducing zero-point systematics in dark energy supernova experiments

Author

Chris Stoughton, Albert Stebbins, William Carithers, Ramon Miquel, Susana E. Deustua, David Tucker, Natalia Connolly, D. W. Gerdes, Eric V. Linder, Alain Bonissent, Gary Bernstein, Shawn McKee, Matthew Brown, G. Kushner, Hemant Shukla, Nick Mostek, Lorenzo Faccioli, L. Gladney, Jodi L. Christiansen, Alex G. Kim, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), RENOIR, and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Cosmic distance ladder, Astrophysics::Instrumentation and Methods for Astrophysics, Scalar field dark matter, FOS: Physical sciences, Zero-point energy, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Redshift, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Supernova, 0103 physical sciences, Calibration, Dark energy, Satellite, 010303 astronomy & astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We study the effect of filter zero-point uncertainties on future supernova dark energy missions. Fitting for calibration parameters using simultaneous analysis of all Type Ia supernova standard candles achieves a significant improvement over more traditional fit methods. This conclusion is robust under diverse experimental configurations (number of observed supernovae, maximum survey redshift, inclusion of additional systematics). This approach to supernova fitting considerably eases otherwise stringent mission calibration requirements. As an example we simulate a space-based mission based on the proposed JDEM satellite; however the method and conclusions are general and valid for any future supernova dark energy mission, ground or space-based., 30 pages,8 figures, 5 table, one reference added, submitted to Astroparticle Physics

Published
2011
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3. Measuring galaxy [O ii] emission line doublet with future ground-based wide-field spectroscopic surveys

Author

David J. Schlegel, Christophe Yèche, Johan Comparat, Jean-Paul Kneib, Jeffrey A. Newman, Nick Mostek, Roland Bacon, Aix Marseille Université (AMU), Département de Mathématiques - EPFL, Ecole Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Department of Physics and Astronomy [Pittsburgh], University of Pittsburgh (PITT), Pennsylvania Commonwealth System of Higher Education (PCSHE)-Pennsylvania Commonwealth System of Higher Education (PCSHE), Département d'Astrophysique (ex SAP) (DAP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, Emission spectrum, 010306 general physics, 010303 astronomy & astrophysics, Spectrograph, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, galaxies: statistics, Line (formation), media_common, instrumentation: spectrographs, Physics, Resolution (electron density), Astronomy and Astrophysics, Galaxy, Redshift, Space and Planetary Science, Sky, cosmology: observations, Baryon acoustic oscillations, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], techniques: spectroscopic, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The next generation of wide-field spectroscopic redshift surveys will map the large-scale galaxy distribution in the redshift range 0.7< z, 5 pages, 1 figure

Published
2013
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4. Stochastic bias of colour-selected BAO tracers by joint clustering-weak lensing analysis

Author

Jean-Paul Kneib, Eric Jullo, Jeffrey A. Newman, Carlos Brandt, David J. Schlegel, Bruno Moraes, Huanyuan Shan, Anne Ealet, Donald P. Schneider, Nick Mostek, Joel R. Brownstein, Stephanie Escoffier, Maria E. S. Pereira, Johan Comparat, Thomas Erben, Francisco Prada, C. Schimd, Olivier Ilbert, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), BOSS, and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy merger, 01 natural sciences, dark matter, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Galaxy group, 0103 physical sciences, Brightest cluster galaxy, Interacting galaxy, 010303 astronomy & astrophysics, Lenticular galaxy, Weak gravitational lensing, galaxies: statistics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, Galaxy, galaxies: haloes, Space and Planetary Science, cosmology: observations, Baryon acoustic oscillations, large-scale structure of Universe, galaxies: evolution, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The baryon acoustic oscillation (BAO) feature in the two-point correlation function of galaxies supplies a standard ruler to probe the expansion history of the Universe. We study here several galaxy selection schemes, aiming at building an emission-line galaxy (ELG) sample in the redshift range $0.61.5$), but we are limited by current data sets depth to derive precise values of the galaxy bias. A survey using such tracers of the mass field will guarantee a high significance detection of the BAO., Comment: 17 pages, 15 figures, submitted to MNRAS

Published
2013
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5. The DEEP2 Galaxy Redshift Survey: Clustering Dependence on Galaxy Stellar Mass and Star Formation Rate at z~1

Author

Nick Mostek, Jeffrey A. Newman, Benjamin J. Weiner, Michael C. Cooper, Alison L. Coil, and Marc Davis

Subjects
Physics, education.field_of_study, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, 010308 nuclear & particles physics, Star formation, Population, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Redshift survey, 01 natural sciences, Halo occupation distribution, Galaxy, Space and Planetary Science, 0103 physical sciences, Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, education, Cluster analysis, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present DEEP2 galaxy clustering measurements at z~1 as a function of stellar mass, star formation rate (SFR), and specific SFR (sSFR). We find a strong positive correlation between stellar mass and clustering amplitude on 1-10 h^-1 Mpc scales for blue, star-forming galaxies with 9.5 < log(M_*/M_sun) < 11 and no dependence for red, quiescent galaxies with 10.5 < log(M_*/M_sun) < 11.5. Using recently re-calibrated DEEP2 SFRs from restframe B-band magnitude and optical colors, we find that within the blue galaxy population at z~1, the clustering amplitude increases strongly with increasing SFR and decreasing sSFR. For red galaxies there is no significant correlation between clustering amplitude and either SFR or sSFR. Blue galaxies with high SFR or low sSFR are as clustered on large scales as red galaxies. We find that the clustering trend observed with SFR can be explained mostly, but not entirely, by the correlation between stellar mass and clustering amplitude for blue galaxies. We also show that galaxies above the star-forming "main sequence" are less clustered than galaxies below the main sequence, at a given stellar mass. These results are not consistent with the high sSFR population being dominated by major mergers. We also measure the clustering amplitude of our samples on small scales (< 0.3 h^-1 Mpc) and find an enhanced clustering signal relative to the best-fit large-scale power law for red galaxies with high stellar mass, blue galaxies with high SFR, and both red and blue galaxies with high sSFR. The increased small-scale clustering for galaxies with high sSFRs is likely linked to triggered star formation in interacting galaxies. These measurements provide strong constraints on galaxy evolution and halo occupation distribution models at z~1., 27 pages, 21 figures, 6 tables, V1-Submitted to ApJ, V2-Accepted to ApJ

Published
2012

6. Mapping the universe with BigBOSS

Author

K. Barbary, Patrick McDonald, Michael Levi, Michael Sholl, Michael Lampton, Patrick N. Jelinsky, Claire Poppett, Alex G. Kim, David J. Schlegel, Jerry Edelstein, Nick Mostek, Natalie A. Roe, Arjun Dey, and Chris Bebek

Subjects
Physics, Galactic astronomy, Standard ruler, Dark energy, Astronomy, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Baryon acoustic oscillations, Astrophysics, Redshift survey, Astrophysics::Galaxy Astrophysics, Galaxy, Redshift
Abstract

[The BigBOSS experiment is a redshift survey designed to map the large scale structure of the universe and probe the nature of dark energy. Using massively-multiplexed _ber spectroscopy over 14,000 deg2 of sky, the survey will deliver more than 20 million galaxy and quasar redshifts. The resulting three dimensional sky map will contain signatures from primordial baryon acoustic oscillations (BAO) that set a "standard ruler" distance scale. Using the BAO signature, BigBOSS will measure the cosmological distance scale to < 1% accuracy from 0.5

Published
2012
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7. The BigBOSS Experiment

Author

Timothy M. Heckman, D. H. Weinberg, Saul Perlmutter, Jeffrey A. Newman, S. LeBohec, Peter Nugent, Brice Ménard, D. Eppelle, Jason X. Prochaska, S. R. Majewski, X. Yang., Michael Schubnell, C. Schimd, David Kieda, H. Heetderks, Javier Sánchez, Ch Yèche, M. Azzaro, M. E. Levi, P. Jelinsky, Chong H. Ahn, Nick Mostek, P. Doel, U. Seljak, Alex G. Kim, Antonio D. Montero-Dorta, M. L. Lampton, C. Tao, Natalie A. Roe, Celine Peroux, H. T. Diehl, Sheila G. Bailey, Benjamin C. Bromley, C. Magneville, G. Rudnick, Dragan Huterer, C. Frenk, R. Mccloskey, O. Lahav, Anne Ealet, C. Allende Prieto, N. Palanque-Delabrouille, David J. Schlegel, R. N. Cahn, Anze Slosar, Marla Geha, J. Annis, H. Lim, Thomas Matheson, D. W. Gerdes, S. Becerril, Will J. Percival, I. Morales, Jordi Miralda-Escudé, J. Tinker, M. Liang, Kevin Reil, Alexander S. Szalay, F. B. Abdalla, M. Wood-Vasey, Marina Cortês, M. R. Blanton, C. Li, P. H. Carton, Nadia L. Zakamska, J. Yang, F. Valdes, W. Springer, Éric Aubourg, W. Lin, A. de la Macorra, N. Ross, Arthur Kosowsky, Steve Kent, Inese I. Ivans, C. Baltay, August E. Evrard, I. Park, Pengjie Zhang, Maryam Modjaz, Nikhil Padmanabhan, Mark Dickinson, Dick Joyce, Bruce Grossan, Michael Sholl, Francisco Prada, V. Le Brun, Chris Bebek, O. Ilbert, D. Sawyer, Kyle Dawson, D. S. Smith, John A. Peacock, Martin White, C. Marinoni, Emmanuel Rollinde, Andrew R. Zentner, R. Scoccimaro, L. Faccioli, Vicent J. Martínez, Jeff McMahon, K. Honscheid, K. A. G. Olsen, P. Petitjean, George F. Smoot, Patrick McDonald, Wolfgang Lorenzon, Roger F. Malina, Y. Jing, G. Tarle, Y. Chu, B. A. Weaver, Stephanie Escoffier, Eric Prieto, Hee-Jong Seo, Arjun Dey, Jerry Edelstein, Erin Sheldon, Antonio González-Arroyo, Adam S. Bolton, C. M. Rockosi, A. Roodman, Carlton M. Baugh, Tinggui Wang, J. P. Kneib, R. Nichol, C. Zhai, K. Krishnan, V. Ruhlmann-Kleider, Eric V. Linder, A. Stril, P. Gondolo, Timothy A. McKay, Jorge L. Cervantes-Cota, R. Shulte-Ladbeck, J. Wang, Tony Abraham, A. Tilquin, C. Kim, Shirley Ho, Xu Kong, R. D. Kennedy, E. N. Taylor, APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Cristofol, Danielle, Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)

Subjects
Physics, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], 010308 nuclear & particles physics, Dark matter, Astronomy, Quasar, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Redshift survey, 01 natural sciences, 7. Clean energy, Redshift, Galaxy, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Redshift-space distortions, [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], 13. Climate action, 0103 physical sciences, Dark energy, Baryon acoustic oscillations, [PHYS.ASTR.IM] Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

This report is based on the BigBOSS proposal submission to NOAO in October 2010, and reflects the project status at that time with minor updates; BigBOSS is a Stage IV ground-based dark energy experiment to study baryon acoustic oscillations (BAO) and the growth of structure with a wide-area galaxy and quasar redshift survey over 14,000 square degrees. It has been conditionally accepted by NOAO in response to a call for major new instrumentation and a high-impact science program for the 4-m Mayall telescope at Kitt Peak. The BigBOSS instrument is a robotically-actuated, fiber-fed spectrograph capable of taking 5000 simultaneous spectra over a wavelength range from 340 nm to 1060 nm, with a resolution R = 3000-4800. Using data from imaging surveys that are already underway, spectroscopic targets are selected that trace the underlying dark matter distribution. In particular, targets include luminous red galaxies (LRGs) up to z = 1.0, extending the BOSS LRG survey in both redshift and survey area. To probe the universe out to even higher redshift, BigBOSS will target bright [OII] emission line galaxies (ELGs) up to z = 1.7. In total, 20 million galaxy redshifts are obtained to measure the BAO feature, trace the matter power spectrum at smaller scales, and detect redshift space distortions. BigBOSS will provide additional constraints on early dark energy and on the curvature of the universe by measuring the Ly-alpha forest in the spectra of over 600,000 2.2 < z < 3.5 quasars. BigBOSS galaxy BAO measurements combined with an analysis of the broadband power, including the Ly-alpha forest in BigBOSS quasar spectra, achieves a FOM of 395 with Planck plus Stage III priors. This FOM is based on conservative assumptions for the analysis of broad band power (kmax = 0.15), and could grow to over 600 if current work allows us to push the analysis to higher wave numbers (kmax = 0.3). BigBOSS will also place constraints on theories of modified gravity and inflation, and will measure the sum of neutrino masses to 0.024 eV accuracy.

Published
2011

8. Pass-band filter performance for space-flight dark energy missions

Author

Nick Mostek, Brian J. Baptista, Alex G. Kim, Charles R. Bower, Manuel A. Quijada, Bruce E. Woodgate, Ray Boucarut, Jerry Edelstein, and S. Mufson

Subjects
Physics, Optics, Transmission (telecommunications), business.industry, System of measurement, Ripple, Calibration, Dark energy, Filter (signal processing), Orbital mechanics, business, Passband
Abstract

The nature of Dark Energy can by constrained by the precise determination of super-novae distance moduli in ultraviolet to near IR pass-bands. Space-based observations are required for these moduli to be measured with the scientifically required photometric accuracies. Consequently, robust pass-band filters operable at cryogenic temperatures (120-140K) are needed that have challenging performance attributes including high in-band transmission, low ripple, good out-ofband rejection, and moderate band-edge slope. We describe the requirements and performance of dielectric multi-layer filters with spectral profiles that are suitable for both achieving the science and for accurate calibration using plausible on-orbit measurement systems.

Published
2010
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9. BigBOSS: The Ground-Based Stage IV BAO Experiment

Author

Saul Perlmutter, Martin White, Natalie A. Roe, Michael Sholl, Tony Abraham, Knut Olsen, Samir Salim, Mike Merrill, Michael Levi, Michael Lampton, Nick Mostek, Buell T. Jannuzi, Arjun Dey, Ming Liang, Nikhil Padmanabhan, H. Heetderks, David J. Schlegel, Chris Bebek, Shirley Ho, Dick Joyce, and George F. Smoot

Subjects
Baryon, Redshift-space distortions, Physics, Astrophysics::Instrumentation and Methods for Astrophysics, Dark energy, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Baryon acoustic oscillations, Redshift survey, Spectrograph, Galaxy, Redshift
Abstract

The BigBOSS experiment is a proposed DOE-NSF Stage IV ground-based dark energy experiment to study baryon acoustic oscillations (BAO) and the growth of structure with an all-sky galaxy redshift survey. The project is designed to unlock the mystery of dark energy using existing ground-based facilities operated by NOAO. A new 4000-fiber R=5000 spectrograph covering a 3-degree diameter field will measure BAO and redshift space distortions in the distribution of galaxies and hydrogen gas spanning redshifts from 0.2< z< 3.5. The Dark Energy Task Force figure of merit (DETF FoM) for this experiment is expected to be equal to that of a JDEM mission for BAO with the lower risk and cost typical of a ground-based experiment.

Published
2009
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10. Precision quantum efficiency measurements on 1.7 micron near infrared devices

Author

M. G. Brown, A. Karabina, Wolfgang Lorenzon, Michael Schubnell, Nick Mostek, S. L. Mufson, G. Tarle, and Curtis Weaverdyck

Subjects
Physics, business.industry, Instrumentation, Detector, Particle detector, Photodiode, law.invention, Halogen lamp, Integrating sphere, Optics, law, Optoelectronics, Quantum efficiency, business, Monochromator
Abstract

High detector quantum efficiency (QE) can greatly improve speed and performance of wide field instruments that strive for fast precision photometry. SNAP, a proposed satellite mission dedicated to exploring the nature of the dark energy will employ a very large focal plane instrumented with about equal number of CCD and NIR sensors totaling more than 600 million pixels covering roughly 0.7 square degrees on the sky. To precisely characterize the NIR detector QE, the SNAP project has put in place a test set-up capable of measuring absolute QE at the 5% level with the goal of ultimately reaching a precision better than 2%. Illumination of the NIR detectors is provided by either a quartz tungsten halogen lamp combined with a set of narrow band filters or a manually tunable monochromator. The two light sources feed an integrating sphere at a distance of roughly 60 cm from the detector to be tested and a calibrated InGaAs photodiode, mounted adjacent to the NIR detector provides absolute photon flux measurements. This paper describes instrumentation, performance and measurement procedures and summarizes results of detailed characterization of the QE on several SNAP devices as a function of wavelength.

Published
2008
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11. Development of NIR detectors and science-driven requirements for SNAP

Author

Albert Stebbins, M. G. Brown, A. G. Kim, M. E. Levi, Ramon Miquel, Suresh Seshadri, L. Gladney, D. W. Gerdes, Nick Mostek, N. Kuznetsova, Hemant Shukla, Eric V. Linder, Michael Schubnell, Saul Perlmutter, G. Kushner, Donald F. Figer, Gary Bernstein, Shawn McKee, Chris Stoughton, Gregory Tarle, Chris Bebek, Alain Bonissent, Wolfgang Lorenzon, Michael Lampton, Roger Smith, D. Cole, B. Carithers, S. L. Mufson, Mather, John C., MacEwen, Howard A., and de Graauw, Mattheus W. M.

Subjects
Physics, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Near-infrared spectroscopy, Detector, Time evolution, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Redshift, chemistry.chemical_compound, Optics, chemistry, Dark energy, Astrophysics::Solar and Stellar Astrophysics, Quantum efficiency, Mercury cadmium telluride, business, Astrophysics::Galaxy Astrophysics, Dark current
Abstract

Precision near infrared (NIR) measurements are essential for the next generation of ground and space based instruments. The SuperNova Acceleration Probe (SNAP) will measure thousands of type Ia supernovae up to a redshift of 1.7. The highest redshift supernovae provide the most leverage for determining cosmological parameters, in particular the dark energy equation of state and its possible time evolution. Accurate NIR observations are needed to utilize the full potential of the highest redshift supernovae. Technological improvements in NIR detector fabrication have lead to high quantum efficiency, low noise detectors using a HgCdTe diode with a band-gap that is tuned to cutoff at 1.7 μm. The effects of detector quantum efficiency, read noise, and dark current on lightcurve signal to noise, lightcurve parameter errors, and distance modulus fits are simulated in the SNAPsim framework. Results show that improving quantum efficiency leads to the largest gains in photometric accuracy for type Ia supernovae. High quantum efficiency in the NIR reduces statistical errors and helps control systematic uncertainties at the levels necessary to achieve the primary SNAP science goals.

Published
2006

12. Near infrared detectors for SNAP

Author

C. R. Bower, Michael Schubnell, N. Barron, Donald F. Figer, S. L. Mufson, D. Cole, Gregory Tarle, Nick Mostek, Wolfgang Lorenzon, Roger Smith, M. Borysow, Chris Bebek, Suresh Seshadri, and M. G. Brown

Subjects
Capacitive coupling, Physics, Pixel, Physics::Instrumentation and Detectors, business.industry, Detector, Near-infrared spectroscopy, Astrophysics::Cosmology and Extragalactic Astrophysics, Large format, Photometry (optics), chemistry.chemical_compound, Optics, chemistry, Mercury cadmium telluride, business, Dark current
Abstract

Large format (1k x 1k and 2k x 2k) near infrared detectors manufactured by Rockwell Scientific Center and Raytheon Vision Systems are characterized as part of the near infrared R&D effort for SNAP (the Super-Nova/Acceleration Probe). These are hybridized HgCdTe focal plane arrays with a sharp high wavelength cut-off at 1.7 um. This cut-off provides a sufficiently deep reach in redshift while it allows at the same time low dark current operation of the passively cooled detectors at 140 K. Here the baseline SNAP near infrared system is briefly described and the science driven requirements for the near infrared detectors are summarized. A few results obtained during the testing of engineering grade near infrared devices procured for the SNAP project are highlighted. In particular some recent measurements that target correlated noise between adjacent detector pixels due to capacitive coupling and the response uniformity within individual detector pixels are discussed.

Published
2006
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13. Supernova / Acceleration Probe: a Satellite Experiment to Study the Nature of the Dark Energy

Author

William W. Craig, Eric Prieto, A. L. Spadafora, A. S. Fruchter, T. Diehl, Gregory Tarle, M. E. Levi, N. Palaio, Susana E. Deustua, Josh Frieman, G. Samdja, Alain Mazure, M. L. Lampton, L. Gladney, Armin Karcher, H. Heetderks, N. Kuznetsova, Eric V. Linder, Edvard Mörtsell, D. W. Gerdes, Douglas L. Tucker, Christopher Stoughton, O. Le Fevre, Saul Perlmutter, Michael L. Brown, Steven E. Kahn, J. I. Lamoureux, Guofeng Wang, Scott Dodelson, Roger F. Malina, D. Rusin, Natalie A. Roe, C. Baltay, Nick Mostek, Dragan Huterer, G. Goldhaber, S. C. Loken, J. P. Marriner, R. Lafever, Hakeem M. Oluseyi, Ralph C. Bohlin, S. T. Holland, A. D. Tomasch, H. von der Lippe, Bhuvnesh Jain, Patrick N. Jelinsky, G. Kushner, E. Basa, John Peoples, Peter Nugent, Jason Rhodes, J. Annis, Greg Aldering, R. Pain, B. Krieger, Alain Bonissent, Keith Taylor, C. R. Bower, F. DeJongh, S. L. Mufson, V. Scarpine, E. Barrelet, D. E. Groom, J.-P. Walder, W. Emmet, Michael Sholl, L. Hui, Lars Bergström, Gary Bernstein, J. A. Musser, W. C. Wester, D. Rabinowitz, M. Hoff, Shawn McKee, J. Snyder, Andrew Szymkowiak, Eugene D. Commins, David H. Pankow, Philip J. Marshall, Timothy A. McKay, N. Morgan, Manfred Bester, Wolfgang Lorenzon, C. T. Day, Andre Tilquin, M.E. Huffer, Roger Smith, Dominique Fouchez, D. Vincent, M. Campbell, A. Goobar, Steve Kent, A. Stebbine, Richard Ellis, Ramon Miquel, William Carithers, Richard Massey, Roger Blandford, Alex G. Kim, P. Limon, H. Lin, A. Refregier, Chris Bebek, Anne Ealet, Pierre Astier, W. Althouse, William F. Kolbe, Michael Schubnell, Rahman Amanullah, George F. Smoot, and C. Bigelow

Subjects
Physics, 010308 nuclear & particles physics, Astronomy, Shape of the universe, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmological constant, Astrophysics, 7. Clean energy, 01 natural sciences, Galaxy, Redshift, Gravitational lens, Vacuum energy, 13. Climate action, 0103 physical sciences, Dark energy, 010303 astronomy & astrophysics, Weak gravitational lensing
Abstract

The Supernova/Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universe's expansion by performing a series of complementary systematics-controlled astrophysical measurements. We here describe a self-consistent reference mission design that can accomplish this goal with the two leading measurement approaches being the Type Ia supernova Hubble diagram and a wide-area weak gravitational lensing survey. This design has been optimized to first order and is now under study for further modification and optimization. A 2-m three-mirror anastigmat wide-field telescope feeds a focal plane consisting of a 0.7 square-degree imager tiled with equal areas of optical CCDs and near infrared sensors, and a high-efficiency low-resolution integral field spectrograph. The instrumentation suite provides simultaneous discovery and light-curve measurements of supernovae and then can target individual objects for detailed spectral characterization. The SNAP mission will discover thousands of Type Ia supernovae out to z = 3 and will obtain high-signal-to-noise calibrated light-curves and spectra for a subset of > 2000 supernovae at redshifts between z = 0.1 and 1.7 in a northern field and in a southern field. A wide-field survey covering one thousand square degrees in both northern and southern fields resolves {approx} 100 galaxies per square arcminute, or a total of more than 300 million galaxies. With the PSF stability afforded by a space observatory, SNAP will provide precise and accurate measurements of gravitational lensing. The high-quality data available in space, combined with the large sample of supernovae, will enable stringent control of systematic uncertainties. The resulting data set will be used to determine the energy density of dark energy and parameters that describe its dynamical behavior. The data also provide a direct test of theoretical models for the dark energy, including discrimination of vacuum energy due to the cosmological constant and various classes of dynamical scalar fields. If we assume we live in a cosmological-constant-dominated Universe, the matter density, dark energy density, and flatness of space can all be measured with SNAP supernova and weak-lensing measurements to a systematics-limited accuracy of 1%. For a flat universe, the density-to-pressure ratio of dark energy or equation of state w(z) can be similarly measured to 5% for the present value w{sub 0} and {approx} 0.1 for the time variation w' {triple_bond} dw/d ln a|{sub z=1}. For a fiducial SUGRA-inspired universe, w{sub 0} and w' can be measured to an even tighter uncertainty of 0.03 and 0.06 respectively. Note that no external priors are needed. As more accurate theoretical predictions for the small-scale weak-lensing shear develop, the conservative estimates adopted here for space-based systematics should improve, allowing even tighter constraints. While the survey strategy is tailored for supernova and weak gravitational lensing observations, the large survey area, depth, spatial resolution, time-sampling, and nine-band optical to NIR photometry will support additional independent and/or complementary dark-energy measurement approaches as well as a broad range of auxiliary science programs.

Published
2005
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14. Supernova Acceleration Probe: Studying Dark Energy with Type Ia Supernovae

Author

P. Limon, Albert Stebbins, Ralph C. Bohlin, Douglas L. Tucker, Armin Karcher, H. Heetderks, Edvard Mörtsell, H. Lin, G. Smadja, J. Musser, C. T. Day, T. Davies, Andre Tilquin, H. von der Lippe, B. Besuner, Martin White, Justin Albert, M. L. Lampton, N. Kuznetsova, A. Refregier, N. Palaio, Susana E. Deustua, L. Gladney, G. Goldhaber, Alex G. Kim, Roger F. Malina, Nick Mostek, Chris Bebek, V. Scarpine, D. Cole, William Carithers, A. D. Tomasch, Richard Massey, Bhuvnesh Jain, Keith Taylor, Roger Blandford, J. P. Marriner, Greg Aldering, David H. Pankow, Michael Seiffert, Eric Prieto, C. R. Bower, Alain Bonissent, Peter Nugent, D. Figer, R. Lafever, John Peoples, D. Vincent, M. Campbell, Stephen Bailey, Michael Sholl, B. Krieger, Alain Mazure, J. I. Lamoureux, M.E. Huffer, Anne Ealet, N. Morgan, S. C. Loken, Dominique Fouchez, A. S. Fruchter, M. Deharveng, V. Lebrun, O. Le Fevre, F. DeJongh, Guofeng Wang, Andrew Szymkowiak, J. Snyder, L. Marian, D. Rusin, Natalie A. Roe, Wolfgang Lorenzon, M. E. Levi, P. Jelinsky, Ramon Miquel, E. Barrelet, L. Hui, W. Emmet, R. Nakajima, Roger Smith, G. Tarle, C. Baltay, Stéphane Basa, Michael L. Brown, Hakeem M. Oluseyi, Christopher Stoughton, S. Allam, S. L. Mufson, M. Frerking, Steven E. Kahn, C. Juramy, W. C. Wester, D. Rabinowitz, D. Peterson, Scott Dodelson, Lars Bergström, H. Shuka, F. Stabenau, B. Bigelow, A. Goobar, Michael Schubnell, B. Mcginnis, M. Hoff, D. E. Groom, Steve Kent, Rahman Amanullah, J.-P. Walder, Saul Perlmutter, Richard Ellis, G. Kushner, Eugene D. Commins, Manfred Bester, Gary Bernstein, Shawn McKee, M. Aumeunier, Philip J. Marshall, A. L. Spadafora, T. Dobson, T. Diehl, B. Mobqsher, D. W. Gerdes, Pierre Astier, W. Althouse, William F. Kolbe, Josh Frieman, Eric V. Linder, Timothy A. McKay, George F. Smoot, William W. Craig, Dragan Huterer, S. T. Holland, A. Weinstein, Jason Rhodes, J. Annis, R. Pain, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), SNAP, Flores, Sylvie, Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Type (model theory), [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], 01 natural sciences, 7. Clean energy, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Acceleration, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, Computer Science::Distributed, Parallel, and Cluster Computing, media_common, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Astronomy, Universe, Supernova, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Dark energy
Abstract

The Supernova Acceleration Probe (SNAP) will use Type Ia supernovae (SNe Ia) as distance indicators to measure the effect of dark energy on the expansion history of the Universe. (SNAP's weak-lensing program is described in a companion White Paper.) The experiment exploits supernova distance measurements up to their fundamental systematic limit; strict requirements on the monitoring of each supernova's properties lead to the need for a space-based mission. Results from pre-SNAP experiments, which characterize fundamental SN Ia properties, will be used to optimize the SNAP observing strategy to yield data, which minimize both systematic and statistical uncertainties. SNAP has achieved technological readiness and the collaboration is poised to begin construction., Comment: 12 pages, 4 figures; White paper to the Dark Energy Task Force

Published
2005
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15. Seeing the Nature of the Accelerating Physics: It's a SNAP

Author

D. Figer, D. Vincent, M. Campbell, Christopher Stoughton, Peter Nugent, George F. Smoot, A. L. Spadafora, M.E. Huffer, M. Frerking, Armin Karcher, Laura Marian, Andrew Szymkowiak, B. Besuner, Martin White, Saul Perlmutter, Alex G. Kim, Kyle Dawson, T. Dobson, R. Nakajima, Stéphane Basa, Michael L. Brown, Keith Taylor, Eric Prieto, Wolfgang Lorenzon, Steven E. Kahn, C. Juramy, P. Limon, C. R. Bower, C. Baltay, Nick Mostek, Roger Smith, S. C. Loken, G. Kushner, Hakeem M. Oluseyi, M. Deharveng, N. Palaio, Eric V. Linder, Susana E. Deustua, H. Lin, G. Smadja, J.-P. Walder, Gerson Goldhaber, M. Aumeunier, Gary Bernstein, H. von der Lippe, Timothy A. McKay, Philip J. Marshall, Pierre Astier, A. Refregier, Chris Bebek, Bahram Mobasher, E. Barrelet, Shawn McKee, J. Albert, Dominique Fouchez, W. Althouse, L. Gladney, R. Lafever, V. Scarpine, D. Cole, John Peoples, William F. Kolbe, B. Krieger, B. Bigelow, M. L. Lampton, N. Kuznetsova, L. Hui, Eugene D. Commins, Guofeng Wang, Tamara M. Davis, H. T. Diehl, Manfred Bester, Reynald Pain, Don Frederic DeJongh, W. Emmet, J. P. Marriner, D. Rabinowitz, Hemant Shukla, O. Le Fevre, S. Allam, Alain Mazure, S. Mufson, Edvard Mörtsell, Michael Levi, David H. Pankow, N. Morgan, H. Heetderks, Ariel Goobar, Albert Stebbins, B. Mcginnis, Richard Ellis, Andre Tilquin, William Wester, Douglas L. Tucker, Joshua A. Frieman, Ramon Miquel, C. T. Day, Bhuvnesh Jain, Steve Kent, D. Peterson, P. Jelinsky, Michael Schubnell, William Carithers, Rahman Amanullah, Richard Massey, Donald E. Groom, Roger Blandford, Roger F. Malina, A. D. Tomasch, G. Tarle, Greg Aldering, Alain Bonissent, Michael Sholl, V. Lebrun, Ralph C. Bohlin, Michael Seiffert, Stephen Bailey, J. I. Lamoureux, J. Snyder, William W. Craig, M. Hoff, Dragan Huterer, S. T. Holland, A. Weinstein, Jason Rhodes, J. Annis, D. W. Gerdes, D. Rusin, Natalie A. Roe, L. Bergstom, Scott Dodelson, F. Stabenau, A. S. Fruchter, and J. Musser

Subjects
Physics, Acceleration, Supernova, Dark energy, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmological constant, Astrophysics, Computer Science::Distributed, Parallel, and Cluster Computing, True insight
Abstract

For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are unavoidably limited, even for distinguishing the cosmological constant. They can pave the way for, but should not delay, SNAP by developing calibration, refinement, and systematics control (and they will also provide important, exciting astrophysics).

Published
2005
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16. Probing Dark Energy via Weak Gravitational Lensing with the SuperNova Acceleration Probe (SNAP)

Author

Greg Aldering, M. Hoff, Ralph C. Bohlin, S. L. Mufson, Andrew Szymkowiak, L. Gladney, O. Le Fevre, D. Cole, Nick Mostek, N. Palaio, Susana E. Deustua, Wolfgang Lorenzon, P. Limon, M. L. Lampton, Dragan Huterer, Scott Dodelson, N. Kuznetsova, Alain Mazure, H. Shuka, S. T. Holland, F. Stabenau, Josh Frieman, Roger Smith, Guofeng Wang, T. Davies, B. Besuner, Martin White, A. Weinstein, Roger F. Malina, Jason Rhodes, J. Annis, R. Lafever, G. Kushner, J. Albert, H. Lin, Saul Perlmutter, Lars Bergström, G. Smadja, R. Pain, Eric V. Linder, B. Krieger, John Peoples, A. D. Tomasch, B. Bigelow, J. Musser, Peter Nugent, A. Refregier, William W. Craig, L. Marian, H. von der Lippe, Michael Seiffert, D. E. Groom, Keith Taylor, Timothy A. McKay, Eric Prieto, Chris Bebek, C. R. Bower, D. Peterson, Albert Stebbins, G. Tarle, Stephen Bailey, J. I. Lamoureux, Christopher Stoughton, J.-P. Walder, F. DeJongh, Alex G. Kim, W. Emmet, Eugene D. Commins, V. Scarpine, M. Frerking, Gary Bernstein, A. Goobar, Douglas L. Tucker, Michael Schubnell, C. T. Day, Andre Tilquin, D. Figer, Shawn McKee, Edvard Mörtsell, Rahman Amanullah, M. Deharveng, Dominique Fouchez, W. C. Wester, D. Rabinowitz, M.E. Huffer, R. Nakajima, J. Snyder, T. Dobson, Armin Karcher, Stéphane Basa, Michael L. Brown, David H. Pankow, Steven E. Kahn, Anne Ealet, C. Juramy, Steve Kent, A. S. Fruchter, S. C. Loken, G. Goldhaber, Bhuvnesh Jain, Alain Bonissent, M. Aumeunier, Philip J. Marshall, J. P. Marriner, M. E. Levi, E. Barrelet, P. Jelinsky, Michael Sholl, A. L. Spadafora, L. Hui, T. Diehl, B. Mcginnis, Richard Ellis, B. Mobqsher, V. Lebrun, S. Allam, William Carithers, George F. Smoot, Richard Massey, Roger Blandford, Pierre Astier, W. Althouse, William F. Kolbe, D. W. Gerdes, D. Rusin, Natalie A. Roe, Ramon Miquel, N. Morgan, H. Heetderks, Manfred Bester, D. Vincent, M. Campbell, C. Baltay, Hakeem M. Oluseyi, Flores, Sylvie, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), SNAP, Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Point spread function, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], 01 natural sciences, law.invention, Telescope, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], law, 0103 physical sciences, 010306 general physics, Weak gravitational lensing, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Redshift, Galaxy, Supernova, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Dark energy, Joint Dark Energy Mission
Abstract

SNAP is a candidate for the Joint Dark Energy Mission (JDEM) that seeks to place constraints on the dark energy using two distinct methods. The first, Type Ia SN, is discussed in a companion white paper. The second method is weak gravitational lensing, which relies on the coherent distortions in the shapes of background galaxies by foreground mass structures. The excellent spatial resolution and photometric accuracy afforded by a 2-meter space-based observatory are crucial for achieving the high surface density of resolved galaxies, the tight control of systematic errors in the telescope's Point Spread Function (PSF), and the exquisite redshift accuracy and depth required by this project. These are achieved by the elimination of atmospheric distortion and much of the thermal and gravity loads on the telescope. The SN and WL methods for probing dark energy are highly complementary and the error contours from the two methods are largely orthogonal., 17 pages, 6 figures; White paper to the Dark Energy Task Force

Published
2005

17. SNAP Telescope

Author

Michael J. Sholl, Michael L. Lampton, Greg Aldering, W. Althouse, R. Amanullah, James T. Annis, Pierre Astier, Charles Baltay, E. Barrelet, Stephane Basa, Christopher J. Bebek, Lars Bergstrom, Gary Bernstein, Manfred Bester, Bruce C. Bigelow, Roger Blandford, Ralph C. Bohlin, Alain Bonissent, Charles R. Bower, Mark L. Brown, Myron Campbell, William C. Carithers, Jr., Eugene D. Commins, W. Craig, C. Day, F. DeJongh, Susana E. Deustua, T. Diehl, S. Dodelson, Anne Ealet, Richard S. Ellis, W. Emmet, D. Fouchez, Josh Frieman, Andrew Fruchter, D. Gerdes, L. Gladney, Gerson Goldhaber, Ariel Goobar, Donald E. Groom, Henry D. Heetderks, M. Hoff, Stephen E. Holland, M. Huffer, L. Hui, Dragan Huterer, B. Jain, Patrick N. Jelinsky, Armin Karcher, Steven M. Kahn, Steven M. Kent, Alex G. Kim, William F. Kolbe, B. Krieger, G. Kushner, N. Kuznetsova, Robin E. Lafever, J. I. Lamoureux, Olivier Le Fevre, Michael E. Levi, P. Limon, Huan Lin, Eric V. Linder, Stewart C. Loken, W. Lorenzon, Roger Malina, J. Marriner, P. Marshall, R. Massey, Alain Mazure, Timothy A. McKay, Shawn P. McKee, Ramon Miquel, Nicholas Morgan, E. M÷rtsell, Nick Mostek, Stuart Mufson, J. A. Musser, Peter E. Nugent, Hakeem M. Oluseyi, Reynald Pain, Nick P. Palaio, David H. Pankow, John Peoples, Jr., Saul Perlmutter, Eric Prieto, David Rabinowitz, Alexandre Refregier, Jason Rhodes, Natalie A. Roe, D. Rusin, V. Scarpine, Michael S. Schubnell, G‰rard Smadja, Roger M. Smith, George F. Smoot, Jeffrey A. Snyder, Anthony Spadafora, A. Stebbins, Christopher Stoughton, Andrew Szymkowiak, Gregory Tarl‰, Keith Taylor, A. Tilquin, Andrew D. Tomasch, Douglas Tucker, D. Vincent, Henrik von der Lippe, Jean-Pierre Walder, Guobin Wang, W. Wester, and Mather, John C.

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

Mission requirements, the baseline design, and optical systems budgets for the SuperNova/Acceleration Probe (SNAP) telescope are presented. SNAP is a proposed space-based experiment designed to study dark energy and alternate explanations of the acceleration of the universe’s expansion by performing a series of complementary systematics-controlled astrophysical measurements. The goals of the mission are a Type Ia supernova Hubble diagram and a wide-field weak gravitational lensing survey. A 2m widefield three-mirror telescope feeds a focal plane consisting of 36 CCDs and 36 HgCdTe detectors and a high-efficiency, low resolution integral field spectrograph. Details of the maturing optical system, with emphasis on structural stability during terrestrial testing as well as expected environments during operations at L2 are discussed. The overall stray light mitigation system, including illuminated surfaces and visible objects are also presented.

Published
2004

18. An integral field spectrograph for SNAP

Author

Anne Ealet, Eric Prieto, Alain Bonissent, Roger Malina, G‰rard Smadja, A. Tilquin, Gary Bernstein, Stephane Basa, D. Fouchez, Olivier Le Fevre, Alain Mazure, Greg Aldering, R. Amanullah, Pierre Astier, E. Barrelet, Christopher J. Bebek, Lars Bergstrom, Manfred Bester, Roger Blandford, Ralph C. Bohlin, Charles R. Bower, Mark L. Brown, Myron Campbell, William C. Carithers, Jr., Eugene D. Commins, W. Craig, C. Day, F. DeJongh, Susana E. Deustua, H. T. Diehl, S. Dodelson, Richard S. Ellis, M. Emmet, Josh Frieman, Andrew Fruchter, D. Gerdes, L. Gladney, Gerson Goldhaber, Ariel Goobar, Donald E. Groom, Henry D. Heetderks, M. Hoff, Stephen E. Holland, M. Huffer, L. Hui, Dragan Huterer, B. Jain, Patrick N. Jelinsky, Armin Karcher, Steven M. Kent, Steven M. Kahn, Alex G. Kim, William F. Kolbe, B. Krieger, G. Kushner, N. Kuznetsova, Robin E. Lafever, J. I. Lamoureux, Michael L. Lampton, Michael E. Levi, P. Limon, Huan Lin, Eric V. Linder, Stewart C. Loken, W. Lorenzon, J. Marriner, P. Marshall, R. Massey, Timothy A. McKay, Shawn P. McKee, Ramon Miquel, Nicholas Morgan, E. M÷rtsell, Nick Mostek, Stuart Mufson, J. A. Musser, Peter E. Nugent, Hakeem M. Oluseyi, Reynald Pain, Nick P. Palaio, David H. Pankow, John Peoples, Jr., Saul Perlmutter, David Rabinowitz, Alexandre Refregier, Jason Rhodes, Natalie A. Roe, D. Rusin, V. Scarpine, Michael S. Schubnell, Michael J. Sholl, Roger M. Smith, George F. Smoot, Jeffrey A. Snyder, Anthony Spadafora, A. Stebbins, Christopher Stoughton, Andrew Szymkowiak, Gregory Tarl‰, Keith Taylor, Andrew D. Tomasch, Douglas Tucker, Henrik von der Lippe, D. Vincent, Jean-Pierre Walder, Guobin Wang, W. Wester, and Mather, John C.

Subjects
Physics, business.industry, Measure (physics), Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Redshift, Acceleration, Optics, Integral field spectrograph, Calibration, Joint Dark Energy Mission, Astrophysics::Earth and Planetary Astrophysics, Spectral resolution, business, Spectrograph, Astrophysics::Galaxy Astrophysics
Abstract

A well-adapted visible and infrared spectrograph has been developed for the SNAP (SuperNova/Acceleration Probe) experiment proposed for JDEM. The primary goal of this instrument is to ensure the control of Type Ia supernovae. The spectrograph is also a key element for calibration and is able to measure redshift of some thousands of galaxy spectra both in visible and IR. An instrument based on an integral field method with the powerful concept of imager slicing has been designed and is presented. We present the current design and expected performances. We show that with the current optimization and the proposed technology, we expect the most sensitive instrument proposed on this kind of mission. We recall the readiness of the concept and of the slicer technology thanks to large prototyping efforts performed in France which validate the proposition

Published
2004

19. SNAP telescope: an update

Author

Ralph C. Bohlin, D. Fouchez, Edvard Mörtsell, Robert Besuner, Alex G. Kim, J. Bercovitz, Nick Mostek, Michael H. Krim, Armin Karcher, Michael Schubnell, Myron Campbell, Keith Taylor, William Carithers, Alain Mazure, S. Mufson, William Emmett, Charles R. Bower, Eric V. Linder, Michael Levi, Rahman Amanullah, N. Morgan, J. A. Musser, Carl W. Akerlof, R. Lafever, Stéphane Basa, Timothy A. McKay, Guobin Wang, George F. Smoot, Henrik von der Lippe, Ariel Goobar, Peter Nugent, D. Vincent, Donald E. Groom, Pierre Astier, Daniel Levin, Jean-Pierre Walder, William E. Johnston, N. Palaio, Susana E. Deustua, William F. Kolbe, J. I. Lamoureux, Gary Berstein, J.F. Genat, Ramon Miquel, Stephen Holland, David H. Pankow, J. Snyder, H. Heetderks, Saul Perlmutter, Andre Tilquin, M. Eriksson, S. C. Loken, E. Barrelet, Greg Aldering, G. Smadja, R. W. Kadel, C. Baltay, Richard S. Ellis, Chris Bebek, Hakeem M. Oluseyi, David Rabinowitz, Dragan Huterer, Jason Rhodes, Andrew Szymkowiak, Manfred Bester, Lars Bergström, C. T. Day, Roger Smith, Eugene D. Commins, Reynald Pain, A. L. Spadafora, G. Goldhaber, Shawn McKee, Roger F. Malina, Andrew S. Fruchter, A. D. Tomasch, Anne Ealet, Gregory Tarle, R. DiGennaro, Alain Bonissent, Alexandre Refregier, Michael Sholl, Eric Prieto, Natalie A. Roe, Oliver LeFevre, Michael Lampton, and MacEwen, Howard A.

Subjects
Physics, Wavefront, business.industry, Stray light, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Anastigmat, Astronomy, Three-mirror anastigmat, Astrophysics::Cosmology and Extragalactic Astrophysics, Orbital mechanics, Redshift, law.invention, Telescope, Optics, law, Astrophysics::Solar and Stellar Astrophysics, Adaptive optics, business, Astrophysics::Galaxy Astrophysics
Abstract

We present the baseline telescope design for the telescope for the SuperNova/Acceleration Probe (SNAP) space mission. SNAP’s purpose is to determine expansion history of the Universe by measuring the redshifts, magnitudes, and spectral classifications of thousands of supernovae with unprecedented accuracy. Discovering and measuring these supernovae demand both a wide optical field and a high sensitivity throughout the visible and near IR wavebands. We have adopted the annular-field three-mirror anastigmat (TMA) telescope configuration, whose classical aberrations (including chromatic) are zero. We show a preliminary optmechanical design that includes important features for stray light control and on-orbit adjustment and alignment of the optics. We briefly discuss stray light and tolerance issues, and present a preliminary wavefront error budget for the SNAP Telescope. We conclude by describing some of the design tasks being carried out during the current SNAP research and development phase.

Published
2004
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20. Weak lensing from space I: instrumentation and survey strategy

Author

S. Harris, H. von der Lippe, Dominique Fouchez, Lars Bergström, C. T. Day, Alex G. Kim, B. Bigelow, Chris Bebek, Myron Campbell, A. L. Spadafora, Saul Perlmutter, Eric Prieto, R. Pratt, M. L. Lampton, S.E. Holland, G. Smadja, A. S. Fruchter, Armin Karcher, B. Krieger, J.-P. Walder, N. Morgan, Gary Bernstein, Peter Nugent, C. Baltay, Eric V. Linder, Shawn McKee, Ariel Goobar, Justin Albert, William E. Johnston, Timothy A. McKay, Hakeem M. Oluseyi, N. Palaio, Susana E. Deustua, Greg Aldering, J. Bercovitz, Nick Mostek, George F. Smoot, David Rabinowitz, Roger F. Malina, Pierre Astier, David Bacon, Keith Taylor, C. R. Bower, William F. Kolbe, R. Lafever, Andrew Szymkowiak, H. Heetderks, David H. Pankow, A. D. Tomasch, G. Kushner, J. A. Musser, Wolfgang Lorenzon, Peter Harvey, D. Rusin, Natalie A. Roe, W. Emmet, Anne Ealet, Roger Smith, S. C. Loken, Ramon Miquel, Edvard Mörtsell, Gerson Goldhaber, E. Barrelet, R. DiGennaro, Alain Bonissent, M. E. Levi, Andre Tilquin, S. L. Mufson, Alexandre Refregier, M. Eriksson, Michael Sholl, Manfred Bester, Richard S. Ellis, Bhuvnesh Jain, D. W. Gerdes, William Carithers, Richard Massey, L. Gladney, D. Vincent, Guofeng Wang, Alain Mazure, Michael Schubnell, Carl W. Akerlof, Rahman Amanullah, Eugene D. Commins, Reynald Pain, Donald E. Groom, J. F. Genat, K. Robinson, Gregory Tarle, Dragan Huterer, Michael E. Brown, J. I. Lamoureux, Ralph C. Bohlin, J. Snyder, N. Kuznetsova, Jason Rhodes, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), California Institute of Technology (CALTECH), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Mathematics [Berkeley], University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), School of Engineering [Edinburgh], University of Edinburgh, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Department of Physics, Stockholm University, Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, Dispositifs et Instrumentation en Optoélectronique et micro-ondes (DIOM), Université Jean Monnet - Saint-Étienne (UJM), Dept Mat Sci & Engn, Zhejiang University, California Institute of Technology (CALTECH)-NASA, University of California [Berkeley], University of California-University of California, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Harvard University [Cambridge]-Smithsonian Institution, DIOM (DIOM), and Université Jean Monnet [Saint-Étienne] (UJM)

Subjects
Point spread function, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmology, law.invention, Telescope, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Spitzer Space Telescope, law, 0103 physical sciences, Dark energy, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Instrumentation, Weak gravitational lensing, Astrophysics::Galaxy Astrophysics, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Supernova
Abstract

A wide field space-based imaging telescope is necessary to fully exploit the technique of observing dark matter via weak gravitational lensing. This first paper in a three part series outlines the survey strategies and relevant instrumental parameters for such a mission. As a concrete example of hardware design, we consider the proposed Supernova/Acceleration Probe (SNAP). Using SNAP engineering models, we quantify the major contributions to this telescope's Point Spread Function (PSF). These PSF contributions are relevant to any similar wide field space telescope. We further show that the PSF of SNAP or a similar telescope will be smaller than current ground-based PSFs, and more isotropic and stable over time than the PSF of the Hubble Space Telescope. We outline survey strategies for two different regimes - a ``wide'' 300 square degree survey and a ``deep'' 15 square degree survey that will accomplish various weak lensing goals including statistical studies and dark matter mapping., 25 pages, 8 figures, 1 table, replaced with Published Version

Published
2004
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21. Calibrating SNAP

Author

Susana Deustua, Sahar Allam, Ralph C. Bohlin, Steven M. Kent, Michael L. Lampton, Bryan E. Laubscher, Nick Mostek, Stuart Mufson, Michael Richmond, J. A. Smith, and Douglas Tucker

Published
2003
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22. SNAP NIR detectors

Author

Eric V. Linder, Guobin Wang, Saul Perlmutter, Steven E. Holland, S. Harris, Dragan Huterer, Greg Aldering, Eric Prieto, R. Lafever, A. L. Spadafora, Jason Rhodes, J.F. Genat, George F. Smoot, Michael Levi, H. von der Lippe, S. C. Loken, Mark L. Brown, Alex G. Kim, Anne Ealet, Pierre Astier, B. Krieger, Daniel Levin, William F. Kolbe, Michael Schubnell, Ariel Goobar, R. DiGennaro, Peter Harvey, E. Barrelet, Richard S. Ellis, Alain Bonissent, Alexandre Refregier, Michael Sholl, Timothy A. McKay, David H. Pankow, R. Pratt, E. Moertsell, Michael Lampton, Susana E. Deustua, H. Heetderks, Rahman Amanullah, Donald E. Groom, M. Eriksson, Nicholas P. Palaio, Manfred Bester, Carl W. Akerlof, K. Robinson, Ramon Miquel, Peter Nugent, J.-P. Walder, Gary Bernstein, Shawn McKee, S. Mufson, Gerson Goldhaber, William Carithers, Richard Massey, Roger F. Malina, Andrew S. Fruchter, A. D. Tomasch, D. Vincent, J. I. Lamoureux, Armin Karcher, C. R. Bower, Gregory Tarle, Natalie A. Roe, J. A. Musser, Lars Bergström, C. T. Day, G. Smadja, Hakeem M. Oluseyi, Chris Bebek, Eugene D. Commins, Reynald Pain, J. Bercovitz, Nick Mostek, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Flores, Sylvie

Subjects
Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 010309 optics, Photometry (optics), Acceleration, Integral field spectrograph, Optics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common, Physics, Zodiacal light, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], business.industry, Near-infrared spectroscopy, Universe, Cardinal point, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Dark energy, business
Abstract

The SuperNova/Acceleration Probe (SNAP) will measure precisely the cosmological expansion history over both the acceleration and deceleration epochs and thereby constrain the nature of the dark energy that dominates our universe today. The SNAP focal plane contains equal areas of optical CCDs and NIR sensors and an integral field spectrograph. Having over 150 million pixels and a field-of-view of 0.34 square degrees, the SNAP NIR system will be the largest yet constructed. With sensitivity in the range 0.9-1.7 μm, it will detect Type Ia supernovae between z = 1 and 1.7 and will provide follow-up precision photometry for all supernovae. HgCdTe technology, with a cut-off tuned to 1.7 μm, will permit passive cooling at 140 K while maintaining noise below zodiacal levels. By dithering to remove the effects of intrapixel variations and by careful attention to other instrumental effects, we expect to control relative photometric accuracy below a few hundredths of a magnitude. Because SNAP continuously revisits the same fields we will be able to achieve outstanding statistical precision on the photometry of reference stars in these fields, allowing precise monitoring of our detectors. The capabilities of the NIR system for broadening the science reach of SNAP are discussed.

Published
2003
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23. DESI and other Dark Energy experiments in the era of neutrino mass measurements

Author

Nick Mostek, Beth Reid, Andreu Font-Ribera, Anže Slosar, Patrick McDonald, and Hee-Jong Seo

Subjects
Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmic microwave background, Dark matter, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift survey, Redshift, Dark radiation, Dark energy, Neutrino, Weak gravitational lensing, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present Fisher matrix projections for future cosmological parameter measurements, including neutrino masses, dark energy, curvature, modified gravity, the inflationary perturbation spectrum, non-Gaussianity, and dark radiation. We focus on DESI and generally redshift surveys (BOSS, HETDEX, eBOSS, Euclid, and WFIRST), but also include CMB (Planck) and weak gravitational lensing (DES and LSST) constraints. The goal is to present a consistent set of projections, for concrete experiments, which are otherwise scattered throughout many papers and proposals. We include neutrino mass as a free parameter in most projections, as it will inevitably be relevant -- DESI and other experiments can measure the sum of neutrino masses to ~0.02 eV or better, while the minimum possible sum is ~0.06 eV. We note that the BAO-only use of galaxy clustering is substantially degraded as a dark energy probe in the presence of neutrino mass uncertainty -- using broadband galaxy power is critical, especially pushing it to as small a scale as possible, and big gains are achieved by combining lensing survey constraints with redshift survey constraints. We do not try to be especially innovative, e.g., in careful treatments of potential systematic errors -- these projections are intended as a straightforward baseline for comparison to more detailed analyses., expanded details of calculations - accepted version

Published
2014
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24. CALIBRATING THE STAR FORMATION RATE ATz∼ 1 FROM OPTICAL DATA

Author

Alison L. Coil, Nick Mostek, Samir Salim, John Moustakas, and Benjamin J. Weiner

Subjects
Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Observational error, Stellar mass, 010308 nuclear & particles physics, Star formation, Extinction (astronomy), DEEP2 Redshift Survey, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Redshift, Luminosity, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present a star-formation rate calibration based on optical data that is consistent with average observed rates in both the red and blue galaxy populations at z~1. The motivation for this study is to calculate SFRs for DEEP2 Redshift Survey galaxies in the 0.7, Comment: 16 pages, 15 figures, emulateapj format, to be submitted to ApJ

Published
2012
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25. SNAP Satellite Focal Plane Development

Author

Eric Prieto, J.-P. Walder, J. F. Genat, Shawn McKee, D. Fouchez, Derek Levin, N. Palaio, Susana E. Deustua, Peter Nugent, Gregory Tarle, D. Vincent, Stéphane Basa, J. Lamoureaux, Steven E. Holland, H. Heetderks, Roger F. Malina, Greg Aldering, David Rabinowitz, G. Goldhaber, R. W. Kadel, Andrew Szymkowiak, C. Baltay, W. Emmett, A. Tilquin, Hakeem M. Oluseyi, A. D. Tomasch, Anne Ealet, R. DiGennaro, H. von der Lippe, Alain Bonissent, Armin Karcher, Roger Smith, Lars Bergström, C. T. Day, Alexandre Refregier, Michael Sholl, Myron Campbell, J. Bercovitz, Nick Mostek, Natalie A. Roe, Guofeng Wang, A. S. Fruchter, A. L. Spadafora, Alain Mazure, Ralph C. Bohlin, M. L. Lampton, David H. Pankow, R. Lafever, Eugene D. Commins, N. Morgan, Carl W. Akerlof, Reynald Pain, A. Goobar, Edvard Mörtsell, Eric V. Linder, Keith Taylor, Manfred Bester, C. R. Bower, Timothy A. McKay, Jason Rhodes, W. Johnson, S. Mufson, J. A. Musser, J. Snyder, G. Smadja, Chris Bebek, Alex G. Kim, William Carithers, S. C. Loken, E. Barrelet, Richard S. Ellis, O. Lefevre, Saul Perlmutter, M. Eriksson, G.P. Berstein, Michael Schubnell, Rahman Amanullah, Donald E. Groom, Ramon Miquel, Pierre Astier, D. Huterer, William F. Kolbe, Michael Levi, George F. Smoot, and Siegmund, Oswald H. W.

Subjects
Physics, business.industry, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, law.invention, Square degree, Telescope, Acceleration, ASIC CCD optical filters focal plane detectors HgCdTe InGaAs spectrograph, Cardinal point, Optics, law, Satellite, Optical filter, business, Spectrograph
Abstract

The proposed SuperNova/Acceleration Probe (SNAP) mission will have a two-meter class telescope delivering diffraction-limited images to an instrumented 0.7 square degree field in the visible and near-infrared wavelength regime. The requirements for the instrument suite and the present configuration of the focal plane concept are presented. A two year R&D phase, largely supported by the Department of Energy, is just beginning. We describe the development activities that are taking place to advance our preparedness for mission proposal in the areas of detectors and electronics.

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