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1. A Study of the Point Spread Function in SDSS Images

Author

Xin, Bo, Ivezić, Željko, Lupton, Robert H., Peterson, John R., Yoachim, Peter, Jones, R. Lynne, Claver, Charles F., and Angeli, George

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We use SDSS imaging data in $ugriz$ passbands to study the shape of the point spread function (PSF) profile and the variation of its width with wavelength and time. We find that the PSF profile is well described by theoretical predictions based on von K\'{a}rm\'{a}n's turbulence theory. The observed PSF radial profile can be parametrized by only two parameters, the profile's full width at half maximum (FWHM) and a normalization of the contribution of an empirically determined "instrumental" PSF. The profile shape is very similar to the "double gaussian plus power-law wing" decomposition used by SDSS image processing pipeline, but here it is successfully modeled with two free model parameters, rather than six as in SDSS pipeline. The FWHM variation with wavelength follows the $\lambda^{\alpha}$ power law, where $\alpha \approx-0.3$ and is correlated with the FWHM itself. The observed behavior is much better described by von K\'{a}rm\'{a}n's turbulence theory with the outer scale parameter in the range 5$-$100 m, than by the Kolmogorov's turbulence theory. We also measure the temporal and angular structure functions for FWHM and compare them to simulations and results from literature. The angular structure function saturates at scales beyond 0.5$-$1.0 degree. The power spectrum of the temporal behavior is found to be broadly consistent with a damped random walk model with characteristic timescale in the range $\sim5-30$ minutes, though data show a shallower high-frequency behavior. The latter is well fit by a single power law with index in the range $-1.5$ to $-1.0$. A hybrid model is likely needed to fully capture both the low-frequency and high-frequency behavior of the temporal variations of atmospheric seeing., Comment: 16 pages, 9 figures, submitted to the Astronomical Journal

Published
2018
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2. LSST: From Science Drivers to Reference Design and Anticipated Data Products

Author

Ivezić, Željko, Kahn, Steven M, Tyson, J Anthony, Abel, Bob, Acosta, Emily, Allsman, Robyn, Alonso, David, AlSayyad, Yusra, Anderson, Scott F, Andrew, John, Angel, James Roger P, Angeli, George Z, Ansari, Reza, Antilogus, Pierre, Araujo, Constanza, Armstrong, Robert, Arndt, Kirk T, Astier, Pierre, Aubourg, Éric, Auza, Nicole, Axelrod, Tim S, Bard, Deborah J, Barr, Jeff D, Barrau, Aurelian, Bartlett, James G, Bauer, Amanda E, Bauman, Brian J, Baumont, Sylvain, Bechtol, Ellen, Bechtol, Keith, Becker, Andrew C, Becla, Jacek, Beldica, Cristina, Bellavia, Steve, Bianco, Federica B, Biswas, Rahul, Blanc, Guillaume, Blazek, Jonathan, Blandford, Roger D, Bloom, Josh S, Bogart, Joanne, Bond, Tim W, Booth, Michael T, Borgland, Anders W, Borne, Kirk, Bosch, James F, Boutigny, Dominique, Brackett, Craig A, Bradshaw, Andrew, Brandt, William Nielsen, Brown, Michael E, Bullock, James S, Burchat, Patricia, Burke, David L, Cagnoli, Gianpietro, Calabrese, Daniel, Callahan, Shawn, Callen, Alice L, Carlin, Jeffrey L, Carlson, Erin L, Chandrasekharan, Srinivasan, Charles-Emerson, Glenaver, Chesley, Steve, Cheu, Elliott C, Chiang, Hsin-Fang, Chiang, James, Chirino, Carol, Chow, Derek, Ciardi, David R, Claver, Charles F, Cohen-Tanugi, Johann, Cockrum, Joseph J, Coles, Rebecca, Connolly, Andrew J, Cook, Kem H, Cooray, Asantha, Covey, Kevin R, Cribbs, Chris, Cui, Wei, Cutri, Roc, Daly, Philip N, Daniel, Scott F, Daruich, Felipe, Daubard, Guillaume, Daues, Greg, Dawson, William, Delgado, Francisco, Dellapenna, Alfred, de Peyster, Robert, de Val-Borro, Miguel, Digel, Seth W, Doherty, Peter, Dubois, Richard, Dubois-Felsmann, Gregory P, Durech, Josef, Economou, Frossie, Eifler, Tim, Eracleous, Michael, Emmons, Benjamin L, and Neto, Angelo Fausti

Subjects
Astronomical Sciences, Physical Sciences, astrometry, cosmology: observations, Galaxy: general, methods: observational, stars: general, surveys, astro-ph, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract

We describe here the most ambitious survey currently planned in the optical, the Large Synoptic Survey Telescope (LSST). The LSST design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the solar system, exploring the transient optical sky, and mapping the Milky Way. LSST will be a large, wide-field ground-based system designed to obtain repeated images covering the sky visible from Cerro Pachón in northern Chile. The telescope will have an 8.4 m (6.5 m effective) primary mirror, a 9.6 deg 2 field of view, a 3.2-gigapixel camera, and six filters (ugrizy) covering the wavelength range 320-1050 nm. The project is in the construction phase and will begin regular survey operations by 2022. About 90% of the observing time will be devoted to a deep-wide-fast survey mode that will uniformly observe a 18,000 deg 2 region about 800 times (summed over all six bands) during the anticipated 10 yr of operations and will yield a co-added map to r ∼27.5. These data will result in databases including about 32 trillion observations of 20 billion galaxies and a similar number of stars, and they will serve the majority of the primary science programs. The remaining 10% of the observing time will be allocated to special projects such as Very Deep and Very Fast time domain surveys, whose details are currently under discussion. We illustrate how the LSST science drivers led to these choices of system parameters, and we describe the expected data products and their characteristics.

Published
2019

3. Image quality estimation: pathfinding for the Vera C. Rubin Observatory

Author

Marshall, Heather K., Spyromilio, Jason, Usuda, Tomonori, Urbach, Elana K., Claver, Charles F., Dennihy, Erik, Fabrega, Juan, Fanning, Kevin, Fisher-Levine, Merlin, Hebert, Claire-Alice, Ingraham, Patrick, Jimenez, David, Johnson, Tony, Lage, Craig, Lupton, Robert, Meyers, Joshua, Park, HyeYun, Pedersen, Eske, Rivera, Mario, Sebag, Jacques, Shugart, Alysha, Sotuela, Ioana, Stalder, Brian, Stubbs, Christopher W., Thayer, Gregg, Thomas, Sandrine, Tighe, Roberto, and Walter, Christopher W.

Published
2024
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4. LSST Science Book, Version 2.0

Author

LSST Science Collaboration, Abell, Paul A., Allison, Julius, Anderson, Scott F., Andrew, John R., Angel, J. Roger P., Armus, Lee, Arnett, David, Asztalos, S. J., Axelrod, Tim S., Bailey, Stephen, Ballantyne, D. R., Bankert, Justin R., Barkhouse, Wayne A., Barr, Jeffrey D., Barrientos, L. Felipe, Barth, Aaron J., Bartlett, James G., Becker, Andrew C., Becla, Jacek, Beers, Timothy C., Bernstein, Joseph P., Biswas, Rahul, Blanton, Michael R., Bloom, Joshua S., Bochanski, John J., Boeshaar, Pat, Borne, Kirk D., Bradac, Marusa, Brandt, W. N., Bridge, Carrie R., Brown, Michael E., Brunner, Robert J., Bullock, James S., Burgasser, Adam J., Burge, James H., Burke, David L., Cargile, Phillip A., Chandrasekharan, Srinivasan, Chartas, George, Chesley, Steven R., Chu, You-Hua, Cinabro, David, Claire, Mark W., Claver, Charles F., Clowe, Douglas, Connolly, A. J., Cook, Kem H., Cooke, Jeff, Cooray, Asantha, Covey, Kevin R., Culliton, Christopher S., de Jong, Roelof, de Vries, Willem H., Debattista, Victor P., Delgado, Francisco, Dell'Antonio, Ian P., Dhital, Saurav, Di Stefano, Rosanne, Dickinson, Mark, Dilday, Benjamin, Djorgovski, S. G., Dobler, Gregory, Donalek, Ciro, Dubois-Felsmann, Gregory, Durech, Josef, Eliasdottir, Ardis, Eracleous, Michael, Eyer, Laurent, Falco, Emilio E., Fan, Xiaohui, Fassnacht, Christopher D., Ferguson, Harry C., Fernandez, Yanga R., Fields, Brian D., Finkbeiner, Douglas, Figueroa, Eduardo E., Fox, Derek B., Francke, Harold, Frank, James S., Frieman, Josh, Fromenteau, Sebastien, Furqan, Muhammad, Galaz, Gaspar, Gal-Yam, A., Garnavich, Peter, Gawiser, Eric, Geary, John, Gee, Perry, Gibson, Robert R., Gilmore, Kirk, Grace, Emily A., Green, Richard F., Gressler, William J., Grillmair, Carl J., Habib, Salman, Haggerty, J. S., Hamuy, Mario, Harris, Alan W., Hawley, Suzanne L., Heavens, Alan F., Hebb, Leslie, Henry, Todd J., Hileman, Edward, Hilton, Eric J., Hoadley, Keri, Holberg, J. B., Holman, Matt J., Howell, Steve B., Infante, Leopoldo, Ivezic, Zeljko, Jacoby, Suzanne H., Jain, Bhuvnesh, Jedicke, Jee, M. James, Jernigan, J. Garrett, Jha, Saurabh W., Johnston, Kathryn V., Jones, R. Lynne, Juric, Mario, Kaasalainen, Mikko, Styliani, Kafka, Kahn, Steven M., Kaib, Nathan A., Kalirai, Jason, Kantor, Jeff, Kasliwal, Mansi M., Keeton, Charles R., Kessler, Richard, Knezevic, Zoran, Kowalski, Adam, Krabbendam, Victor L., Krughoff, K. Simon, Kulkarni, Shrinivas, Kuhlman, Stephen, Lacy, Mark, Lepine, Sebastien, Liang, Ming, Lien, Amy, Lira, Paulina, Long, Knox S., Lorenz, Suzanne, Lotz, Jennifer M., Lupton, R. H., Lutz, Julie, Macri, Lucas M., Mahabal, Ashish A., Mandelbaum, Rachel, Marshall, Phil, May, Morgan, McGehee, Peregrine M., Meadows, Brian T., Meert, Alan, Milani, Andrea, Miller, Christopher J., Miller, Michelle, Mills, David, Minniti, Dante, Monet, David, Mukadam, Anjum S., Nakar, Ehud, Neill, Douglas R., Newman, Jeffrey A., Nikolaev, Sergei, Nordby, Martin, O'Connor, Paul, Oguri, Masamune, Oliver, John, Olivier, Scot S., Olsen, Julia K., Olsen, Knut, Olszewski, Edward W., Oluseyi, Hakeem, Padilla, Nelson D., Parker, Alex, Pepper, Joshua, Peterson, John R., Petry, Catherine, Pinto, Philip A., Pizagno, James L., Popescu, Bogdan, Prsa, Andrej, Radcka, Veljko, Raddick, M. Jordan, Rasmussen, Andrew, Rau, Arne, Rho, Jeonghee, Rhoads, James E., Richards, Gordon T., Ridgway, Stephen T., Robertson, Brant E., Roskar, Rok, Saha, Abhijit, Sarajedini, Ata, Scannapieco, Evan, Schalk, Terry, Schindler, Rafe, Schmidt, Samuel, Schmidt, Sarah, Schneider, Donald P., Schumacher, German, Scranton, Ryan, Sebag, Jacques, Seppala, Lynn G., Shemmer, Ohad, Simon, Joshua D., Sivertz, M., Smith, Howard A., Smith, J. Allyn, Smith, Nathan, Spitz, Anna H., Stanford, Adam, Stassun, Keivan G., Strader, Jay, Strauss, Michael A., Stubbs, Christopher W., Sweeney, Donald W., Szalay, Alex, Szkody, Paula, Takada, Masahiro, Thorman, Paul, Trilling, David E., Trimble, Virginia, Tyson, Anthony, Van Berg, Richard, Berk, Daniel Vanden, VanderPlas, Jake, Verde, Licia, Vrsnak, Bojan, Walkowicz, Lucianne M., Wandelt, Benjamin D., Wang, Sheng, Wang, Yun, Warner, Michael, Wechsler, Risa H., West, Andrew A., Wiecha, Oliver, Williams, Benjamin F., Willman, Beth, Wittman, David, Wolff, Sidney C., Wood-Vasey, W. Michael, Wozniak, Przemek, Young, Patrick, Zentner, Andrew, and Zhan, Hu

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Galaxy Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade. The Large Synoptic Survey Telescope (LSST) will have an effective aperture of 6.7 meters and an imaging camera with field of view of 9.6 deg^2, and will be devoted to a ten-year imaging survey over 20,000 deg^2 south of +15 deg. Each pointing will be imaged 2000 times with fifteen second exposures in six broad bands from 0.35 to 1.1 microns, to a total point-source depth of r~27.5. The LSST Science Book describes the basic parameters of the LSST hardware, software, and observing plans. The book discusses educational and outreach opportunities, then goes on to describe a broad range of science that LSST will revolutionize: mapping the inner and outer Solar System, stellar populations in the Milky Way and nearby galaxies, the structure of the Milky Way disk and halo and other objects in the Local Volume, transient and variable objects both at low and high redshift, and the properties of normal and active galaxies at low and high redshift. It then turns to far-field cosmological topics, exploring properties of supernovae to z~1, strong and weak lensing, the large-scale distribution of galaxies and baryon oscillations, and how these different probes may be combined to constrain cosmological models and the physics of dark energy., Comment: 596 pages. Also available at full resolution at http://www.lsst.org/lsst/scibook

Published
2009

5. LSST: from Science Drivers to Reference Design and Anticipated Data Products

Author

Ivezić, Željko, Kahn, Steven M., Tyson, J. Anthony, Abel, Bob, Acosta, Emily, Allsman, Robyn, Alonso, David, AlSayyad, Yusra, Anderson, Scott F., Andrew, John, Angel, James Roger P., Angeli, George Z., Ansari, Reza, Antilogus, Pierre, Araujo, Constanza, Armstrong, Robert, Arndt, Kirk T., Astier, Pierre, Aubourg, Éric, Auza, Nicole, Axelrod, Tim S., Bard, Deborah J., Barr, Jeff D., Barrau, Aurelian, Bartlett, James G., Bauer, Amanda E., Bauman, Brian J., Baumont, Sylvain, Becker, Andrew C., Becla, Jacek, Beldica, Cristina, Bellavia, Steve, Bianco, Federica B., Biswas, Rahul, Blanc, Guillaume, Blazek, Jonathan, Blandford, Roger D., Bloom, Josh S., Bogart, Joanne, Bond, Tim W., Borgland, Anders W., Borne, Kirk, Bosch, James F., Boutigny, Dominique, Brackett, Craig A., Bradshaw, Andrew, Brandt, William Nielsen, Brown, Michael E., Bullock, James S., Burchat, Patricia, Burke, David L., Cagnoli, Gianpietro, Calabrese, Daniel, Callahan, Shawn, Callen, Alice L., Chandrasekharan, Srinivasan, Charles-Emerson, Glenaver, Chesley, Steve, Cheu, Elliott C., Chiang, Hsin-Fang, Chiang, James, Chirino, Carol, Chow, Derek, Ciardi, David R., Claver, Charles F., Cohen-Tanugi, Johann, Cockrum, Joseph J., Coles, Rebecca, Connolly, Andrew J., Cook, Kem H., Cooray, Asantha, Covey, Kevin R., Cribbs, Chris, Cui, Wei, Cutri, Roc, Daly, Philip N., Daniel, Scott F., Daruich, Felipe, Daubard, Guillaume, Daues, Greg, Dawson, William, Delgado, Francisco, Dellapenna, Alfred, de Peyster, Robert, de Val-Borro, Miguel, Digel, Seth W., Doherty, Peter, Dubois, Richard, Dubois-Felsmann, Gregory P., Durech, Josef, Economou, Frossie, Eracleous, Michael, Ferguson, Henry, Figueroa, Enrique, Fisher-Levine, Merlin, Focke, Warren, Foss, Michael D., Frank, James, Freemon, Michael D., Gangler, Emmanuel, Gawiser, Eric, Geary, John C., Gee, Perry, Geha, Marla, Gessner, Charles J. B., Gibson, Robert R., Gilmore, D. Kirk, Glanzman, Thomas, Glick, William, Goldina, Tatiana, Goldstein, Daniel A., Goodenow, Iain, Graham, Melissa L., Gressler, William J., Gris, Philippe, Guy, Leanne P., Guyonnet, Augustin, Haller, Gunther, Harris, Ron, Hascall, Patrick A., Haupt, Justine, Hernandez, Fabio, Herrmann, Sven, Hileman, Edward, Hoblitt, Joshua, Hodgson, John A., Hogan, Craig, Huang, Dajun, Huffer, Michael E., Ingraham, Patrick, Innes, Walter R., Jacoby, Suzanne H., Jain, Bhuvnesh, Jammes, Fabrice, Jee, James, Jenness, Tim, Jernigan, Garrett, Jevremović, Darko, Johns, Kenneth, Johnson, Anthony S., Johnson, Margaret W. G., Jones, R. Lynne, Juramy-Gilles, Claire, Jurić, Mario, Kalirai, Jason S., Kallivayalil, Nitya J., Kalmbach, Bryce, Kantor, Jeffrey P., Karst, Pierre, Kasliwal, Mansi M., Kelly, Heather, Kessler, Richard, Kinnison, Veronica, Kirkby, David, Knox, Lloyd, Kotov, Ivan V., Krabbendam, Victor L., Krughoff, K. Simon, Kubánek, Petr, Kuczewski, John, Kulkarni, Shri, Ku, John, Kurita, Nadine R., Lage, Craig S., Lambert, Ron, Lange, Travis, Langton, J. Brian, Guillou, Laurent Le, Levine, Deborah, Liang, Ming, Lim, Kian-Tat, Lintott, Chris J., Long, Kevin E., Lopez, Margaux, Lotz, Paul J., Lupton, Robert H., Lust, Nate B., MacArthur, Lauren A., Mahabal, Ashish, Mandelbaum, Rachel, Marsh, Darren S., Marshall, Philip J., Marshall, Stuart, May, Morgan, McKercher, Robert, McQueen, Michelle, Meyers, Joshua, Migliore, Myriam, Miller, Michelle, Mills, David J., Miraval, Connor, Moeyens, Joachim, Monet, David G., Moniez, Marc, Monkewitz, Serge, Montgomery, Christopher, Mueller, Fritz, Muller, Gary P., Arancibia, Freddy Muñoz, Neill, Douglas R., Newbry, Scott P., Nief, Jean-Yves, Nomerotski, Andrei, Nordby, Martin, O'Connor, Paul, Oliver, John, Olivier, Scot S., Olsen, Knut, O'Mullane, William, Ortiz, Sandra, Osier, Shawn, Owen, Russell E., Pain, Reynald, Palecek, Paul E., Parejko, John K., Parsons, James B., Pease, Nathan M., Peterson, J. Matt, Peterson, John R., Petravick, Donald L., Petrick, M. E. Libby, Petry, Cathy E., Pierfederici, Francesco, Pietrowicz, Stephen, Pike, Rob, Pinto, Philip A., Plante, Raymond, Plate, Stephen, Price, Paul A., Prouza, Michael, Radeka, Veljko, Rajagopal, Jayadev, Rasmussen, Andrew P., Regnault, Nicolas, Reil, Kevin A., Reiss, David J., Reuter, Michael A., Ridgway, Stephen T., Riot, Vincent J., Ritz, Steve, Robinson, Sean, Roby, William, Roodman, Aaron, Rosing, Wayne, Roucelle, Cecille, Rumore, Matthew R., Russo, Stefano, Saha, Abhijit, Sassolas, Benoit, Schalk, Terry L., Schellart, Pim, Schindler, Rafe H., Schmidt, Samuel, Schneider, Donald P., Schneider, Michael D., Schoening, William, Schumacher, German, Schwamb, Megan E., Sebag, Jacques, Selvy, Brian, Sembroski, Glenn H., Seppala, Lynn G., Serio, Andrew, Serrano, Eduardo, Shaw, Richard A., Shipsey, Ian, Sick, Jonathan, Silvestri, Nicole, Slater, Colin T., Smith, J. Allyn, Smith, R. Chris, Sobhani, Shahram, Soldahl, Christine, Storrie-Lombardi, Lisa, Stover, Edward, Strauss, Michael A., Street, Rachel A., Stubbs, Christopher W., Sullivan, Ian S., Sweeney, Donald, Swinbank, John D., Szalay, Alexander, Takacs, Peter, Tether, Stephen A., Thaler, Jon J., Thayer, John Gregg, Thomas, Sandrine, Thukral, Vaikunth, Tice, Jeffrey, Trilling, David E., Turri, Max, Van Berg, Richard, Berk, Daniel Vanden, Vetter, Kurt, Virieux, Francoise, Vucina, Tomislav, Wahl, William, Walkowicz, Lucianne, Walsh, Brian, Walter, Christopher W., Wang, Daniel L., Wang, Shin-Yawn, Warner, Michael, Wiecha, Oliver, Willman, Beth, Winters, Scott E., Wittman, David, Wolff, Sidney C., Wood-Vasey, W. Michael, Wu, Xiuqin, Xin, Bo, Yoachim, Peter, and Zhan, Hu

Subjects
Astrophysics
Abstract

(Abridged) We describe here the most ambitious survey currently planned in the optical, the Large Synoptic Survey Telescope (LSST). A vast array of science will be enabled by a single wide-deep-fast sky survey, and LSST will have unique survey capability in the faint time domain. The LSST design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the Solar System, exploring the transient optical sky, and mapping the Milky Way. LSST will be a wide-field ground-based system sited at Cerro Pach\'{o}n in northern Chile. The telescope will have an 8.4 m (6.5 m effective) primary mirror, a 9.6 deg$^2$ field of view, and a 3.2 Gigapixel camera. The standard observing sequence will consist of pairs of 15-second exposures in a given field, with two such visits in each pointing in a given night. With these repeats, the LSST system is capable of imaging about 10,000 square degrees of sky in a single filter in three nights. The typical 5$\sigma$ point-source depth in a single visit in $r$ will be $\sim 24.5$ (AB). The project is in the construction phase and will begin regular survey operations by 2022. The survey area will be contained within 30,000 deg$^2$ with $\delta<+34.5^\circ$, and will be imaged multiple times in six bands, $ugrizy$, covering the wavelength range 320--1050 nm. About 90\% of the observing time will be devoted to a deep-wide-fast survey mode which will uniformly observe a 18,000 deg$^2$ region about 800 times (summed over all six bands) during the anticipated 10 years of operations, and yield a coadded map to $r\sim27.5$. The remaining 10\% of the observing time will be allocated to projects such as a Very Deep and Fast time domain survey. The goal is to make LSST data products, including a relational database of about 32 trillion observations of 40 billion objects, available to the public and scientists around the world., Comment: 57 pages, 32 color figures, version with high-resolution figures available from https://www.lsst.org/overview

Published
2008
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6. Confirmation of SBS 1150+599A As An Extremely Metal-Poor Planetary Nebula

Author

Jacoby, George, Feldmeier, John, Claver, Charles F., Garnavich, Peter M., Noriega-Crespo, Alberto, Bond, Howard E., and Quinn, Jason

Subjects
Astrophysics
Abstract

SBS 1150+599A is a blue stellar object at high galactic latitude discovered in the Second Byurakan Survey. New high-resolution images of SBS 1150+599A are presented, demonstrating that it is very likely to be an old planetary nebula in the galactic halo, as suggested by Tovmassian et al (2001). An H-alpha image taken with the WIYN 3.5-m telescope and its "tip/tilt" module reveals the diameter of the nebula to be 9.2", comparable to that estimated from spectra by Tovmassian et al. Lower limits to the central star temperature were derived using the Zanstra hydrogen and helium methods to determine that the star's effective temperature must be > 68,000K and that the nebula is optically thin. New spectra from the MMT and FLWO telescopes are presented, revealing the presence of strong [Ne V] lambda 3425, indicating that the central star temperature must be > 100,000K. With the revised diameter, new central star temperature, and an improved central star luminosity, we can constrain photoionization models for the nebula significantly better than before. Because the emission-line data set is sparse, the models are still not conclusive. Nevertheless, we confirm that this nebula is an extremely metal-poor planetary nebula, having a value for O/H that is less than 1/100 solar, and possibly as low as 1/500 solar., Comment: 19 pages, 6 figures. Accepted for publication in the Astronomical Journal

Published
2002
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7. Decay of the GRB 990123 Optical Afterglow: Implications for the Fireball Model

Author

Castro-Tirado, Alberto J., Zapatero-Osorio, María Rosa, Caon, Nicola, Cairós, Luz Marina, Hjorth, Jens, Pedersen, Holger, Andersen, Michael I., Gorosabel, Javier, Bartolini, Corrado, Guarnieri, Adriano, Piccioni, Adalberto, Frontera, Filippo, Masetti, Nicola, Palazzi, Eliana, Pian, Elena, Greiner, Jochen, Hudec, Renè, Sagar, Ram, Pandey, Anil K., Mohan, Vinay, Björnsson, Gunnlaugur, Jakobsson, Páll, Burud, Ingunn, Courbin, Frederic, Valentini, Gaetano, Piersimoni, Anna, Aceituno, Jesús, Montoya, Luz María, Pedraz, Santos, Gredel, Roland, Claver, Charles F., Rector, Travis A., Rhoads, James E., Walter, Fabian, Ott, Jürgen, Hippelein, Hans, Sánchez-Béjar, Victor, Gutiérrez, Carlos, Oscoz, Alejandro, Zhu, Jin, Chen, Jiansheng, Zhang, Haotong, Wei, Jianyan, Zhou, Aiying, Guiziy, Sergei, Shlyapnikov, Aleksei, Heise, John, Costa, Enrico, Feroci, Marco, and Piro, Luigi

Published
1999

8. The Vera C. Rubin Observatory 8.4m telescope calibration system status

Author

Ingraham, Patrick J., primary, Fagrelius, Parker, additional, Stubbs, Christopher W., additional, Lupton, Robert H., additional, Liang, Ming, additional, Neill, Douglas R., additional, Muller, Gary, additional, Claver, Charles F., additional, Sebag, Jacques, additional, Thomas, Sandrine, additional, and Owen, Russell, additional

Published
2022
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9. MONSOON Image Acquisition System

Author

Starr, Barry M., Buchholz, Nicholas, Rahmer, Gustavo, Penegor, Jerry, Schmidt, Ricardo, Warner, Michael, Merrill, K. Michael, Claver, Charles F., Ho Y., Chopra, Kaviraj, Mondaca, Eduardo, Shroff, Chirag, Shroff, D., Burton, W. B., editor, Kuijpers, J. M. E., editor, Van Den Heuvel, E. P. J., editor, Van Der Laan, H., editor, Amico, Paola, editor, Beletic, James W., editor, and Beletic, Jenna E., editor

Published
2004
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10. Rubin Observatory active optics system status

Author

Thomas, Sandrine J., primary, Xin, Bo, additional, Claver, Charles F., additional, Connolly, Andrew J., additional, Kalmbach, J. Bryce, additional, Neill, Douglas R., additional, Ribeiro, Tiago, additional, Suberlak, Chris, additional, and Tsai, Tei-Wei, additional

Published
2020
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11. Vera C. Rubin Observatory system integration, test, and commissioning: strategy and status

Author

Sebag, Jacques, primary, Claver, Charles F., additional, Thomas, Sandrine J., additional, Reil, kevin, additional, Barr, Jeffrey, additional, Bechtol, Keith, additional, Daruich, Felipe, additional, fabrega, juan, additional, Guy, leanne P., additional, ingraham, patrick, additional, krabbendam, victor, additional, lopez, margaux, additional, Munoz, Freddy, additional, Neill, Doug, additional, O'Mullane, Wil, additional, Reuter, Michael, additional, Roberts, Austin, additional, Ribeiro, Tiago, additional, Serrano, Eduardo, additional, Silva, Cristian, additional, Stalder, Brian, additional, tighe, roberto, additional, and Xin, Bo, additional

Published
2020
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12. Vera C. Rubin Observatory auxiliary telescope commissioning as a control system pathfinder

Author

Ingraham, Patrick J., primary, Clements, Andy W., additional, Ribeiro, Tiago, additional, Reuter, Michael A., additional, Fisher-Levine, Merlin, additional, Hoblitt, Joshua, additional, Lupton, Robert H., additional, Thomas, Sandrine, additional, Stubbs, Christopher W., additional, Arndt, Kirk, additional, Callahan, Nick, additional, Claver, CHarles F., additional, Colleoni, Franco, additional, Corral, Luis, additional, Doherty, Peter, additional, Economou, Frossie, additional, Fausti, Angel, additional, Jeness, Tim, additional, Khine, Htut, additional, Krughoff, Simon, additional, Mondrik, Nicholas, additional, Menanteau, Felipe, additional, Mills, David J., additional, O'Mullane, William, additional, Reil, Kevin A., additional, Rivera, Mario, additional, Stalder, Brian, additional, Sebag, Jacques, additional, Shipsey, Ian, additional, Tighe, Roberto, additional, Thornton, Adam J., additional, Villalobos, Andres, additional, and Wiecha, Oliver, additional

Published
2020
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15. V&V planning and execution in an integrated model-based engineering environment using MagicDraw, Syndeia, and JIRA

Author

Selvy, Brian M., primary, Claver, Charles F., primary, Reuter, Michael, primary, Bajaj, Manas, primary, Zwemer, Dirk, primary, Van Klaveren, Brian, primary, Thomas, Sandrine, primary, Roberts, Austin, primary, Comoretto, Gabriele, primary, Jenness, Tim, primary, O'Mullane, Wil, primary, Serio, Andrew, primary, Bovill, Rob, primary, and Sebag, Jacques, primary

Published
2018
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19. Vera C. Rubin Observatory auxiliary telescope commissioning as a control system pathfinder

Author

Guzman, Juan C., Ibsen, Jorge, Ingraham, Patrick, Clements, Andy W., Ribeiro, Tiago, Reuter, Michael A., Fisher-Levine, Merlin, Hoblitt, Joshua, Lupton, Robert H., Thomas, Sandrine, Stubbs, Christopher W., Arndt, Kirk T., Callahan, Nick, Claver, Charles F., Colleoni, Franco, Corral, Luis, Doherty, Peter, Economou, Frossie, Fausti Neto, Angel, Jeness, Tim, Khine, Htut, Krughoff, K. Simon, Mondrik, Nicholas, Menanteau, Felipe, Mills, David J., O'Mullane, William, Reil, Kevin A., Rivera, Mario, Stalder, Brian, Sebag, Jacques, Shipsey, Ian, Tighe, Roberto, Thornton, Adam J., Villalobos, Andres, and Wiecha, Oliver

Published
2020
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20. Vera C. Rubin Observatory system integration, test, and commissioning: strategy and status

Author

Marshall, Heather K., Spyromilio, Jason, Usuda, Tomonori, Sebag, Jacques, Claver, Charles F., Thomas, Sandrine J., Reil, Kevin, Barr, Jeffrey, Bechtol, Keith, Daruich, Felipe, Fabrega, Juan, Guy, Leanne P., Ingraham, Patrick, Krabbendam, Victor, Lopez, Margaux, Munoz, Freddy, Neill, Doug, O'Mullane, Wil, Reuter, Michael, Roberts, Austin, Ribeiro, Tiago, Serrano, Eduardo, Silva, Cristian, Stalder, Brian, Tighe, Roberto, and Xin, Bo

Published
2020
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21. An optical to IR sky brightness model for the LSST

Author

Yoachim, Peter, additional, Coughlin, Michael, additional, Angeli, George Z., additional, Claver, Charles F., additional, Connolly, Andrew J., additional, Cook, Kem, additional, Daniel, Scott, additional, Ivezić, Željko, additional, Jones, R. Lynne, additional, Petry, Catherine, additional, Reuter, Michael, additional, Stubbs, Christopher, additional, and Xin, Bo, additional

Published
2016
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22. An end-to-end simulation framework for the Large Synoptic Survey Telescope

Author

Connolly, Andrew J., additional, Angeli, George Z., additional, Chandrasekharan, Srinivasan, additional, Claver, Charles F., additional, Cook, Kem, additional, Ivezic, Zeljko, additional, Jones, R. Lynne, additional, Krughoff, K. Simon, additional, Peng, En-Hsin, additional, Peterson, John, additional, Petry, Catherine, additional, Rasmussen, Andrew P., additional, Ridgway, Stephen T., additional, Saha, Abhijit, additional, Sembroski, Glenn, additional, vanderPlas, Jacob, additional, and Yoachim, Peter, additional

Published
2014
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25. Simulating the LSST system

Author

Connolly, A. J., primary, Peterson, John, additional, Jernigan, J. Garrett, additional, Abel, Robert, additional, Bankert, Justin, additional, Chang, Chihway, additional, Claver, Charles F., additional, Gibson, Robert, additional, Gilmore, David K., additional, Grace, Emily, additional, Jones, R. Lynne, additional, Ivezic, Zeljko, additional, Jee, James, additional, Juric, Mario, additional, Kahn, Steven M., additional, Krabbendam, Victor L., additional, Krughoff, Simon, additional, Lorenz, Suzanne, additional, Pizagno, James, additional, Rasmussen, Andrew, additional, Todd, Nathan, additional, Tyson, J. Anthony, additional, and Young, Mallory, additional

Published
2010
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26. Using SysML for MBSE analysis of the LSST system

Author

Claver, Charles F., primary, Dubois-Felsmann, Gregory, additional, Delgado, Francisco, additional, Hascall, Pat, additional, Marshall, Stuart, additional, Nordby, Martin, additional, Schalk, Terry, additional, Schumacher, German, additional, and Sebag, Jacques, additional

Published
2010
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29. MONSOON: Image Acquisition System or "Pixel Server"

Author

Starr, Barry M., primary, Buchholz, Nick C., additional, Rahmer, Gustavo, additional, Penegor, Gerald, additional, Schmidt, Ricardo E., additional, Warner, Michael, additional, Merrill, Michael, additional, Claver, Charles F., additional, Ho, Y., additional, Chopra, K. N., additional, Shroff, C., additional, and Shroff, D., additional

Published
2003
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31. WIYN tip-tilt module performance

Author

Claver, Charles F., primary, Corson, Charles, additional, Gomez, Jr., R. Richard, additional, Daly, Philip N., additional, Dryden, David M., additional, and Abareshi, Behzod, additional

Published
2003
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34. LSST Instrument Concept

Author

Starr, Barry M., primary, Claver, Charles F., additional, Wolff, Sidney, additional, Tyson, J. Anthony, additional, Lesser, Michael P., additional, Daggert, Larry G., additional, Dominguez, Ruben, additional, Gomez, Jr., R. Richard, additional, and Muller, Gary P., additional

Published
2002
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36. WIYN One Degree Imager (ODI)

Author

Jacoby, George H., primary, Tonry, John L., additional, Burke, Barry E., additional, Claver, Charles F., additional, Starr, Barry M., additional, Saha, Abhijit, additional, Luppino, Gerard A., additional, and Harmer, Charles F. W., additional

Published
2002
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37. Project status of the 8.4-m LSST.

Author

Claver, Charles F., Sweeney, Donald W., Tyson, John A., Althouse, Bryan, Axelrod, Timothy S., Cook, Kem H., Daggert, Larry G., Kantor, Jeffrey C., Kahn, Steven M., Krabbendam, Victor L., Pinto, Philip, Sebag, Jacques, Stubbs, C., and Wolff, Sidney C.

Published
2004
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40. WIYN One Degree Imager (ODI).

Author

Jacoby, George H., Tonry, John L., Burke, Barry E., Claver, Charles F., Starr, Barry M., Saha, Abhijit, Luppino, Gerard A., and Harmer, Charles F. W.

Published
2002
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41. LSST Instrument Concept.

Author

Starr, Barry M., Claver, Charles F., Wolff, Sidney, Tyson, J. Anthony, Lesser, Michael P., Daggert, Larry G., Dominguez, Ruben, Gomez Jr., R. Richard, and Muller, Gary P.

Published
2002
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42. An optical to IR sky brightness model for the LSST

Author

Peck, Alison B., Seaman, Robert L., Benn, Chris R., Yoachim, Peter, Coughlin, Michael, Angeli, George Z., Claver, Charles F., Connolly, Andrew J., Cook, Kem, Daniel, Scott, Ivezić, Željko, Jones, R. Lynne, Petry, Catherine, Reuter, Michael, Stubbs, Christopher, and Xin, Bo

Published
2016
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