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3. Sensitivity of the Prime-Cam Instrument on the CCAT-Prime Telescope

Author

Choi, S. K., Austermann, J., Basu, K., Battaglia, N., Bertoldi, F., Chung, D. T., Cothard, N. F., Duff, S., Duell, C. J., Gallardo, P. A., Gao, J., Herter, T., Hubmayr, J., Niemack, M. D., Nikola, T., Riechers, D., Rossi, K., Stacey, G. J., Stevens, J. R., Vavagiakis, E. M., Vissers, M., and Walker, S.

Published
2020
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6. The Advanced ACTPol 27/39 GHz Array

Author

Simon, S. M., Beall, J. A., Cothard, N. F., Duff, S. M., Gallardo, P. A., Ho, S. P., Hubmayr, J., Koopman, B. J., McMahon, J. J., Nati, F., Niemack, M. D., Staggs, S. T., Vavagiakis, E. M., and Wollack, E. J.

Published
2018
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11. Advanced ACTPol Cryogenic Detector Arrays and Readout

Author

Henderson, S. W., Allison, R., Austermann, J., Baildon, T., Battaglia, N., Beall, J. A., Becker, D., De Bernardis, F., Bond, J. R., Calabrese, E., Choi, S. K., Coughlin, K. P., Crowley, K. T., Datta, R., Devlin, M. J., Duff, S. M., Dunkley, J., Dünner, R., van Engelen, A., Gallardo, P. A., Grace, E., Hasselfield, M., Hills, F., Hilton, G. C., Hincks, A. D., Hloẑek, R., Ho, S. P., Hubmayr, J., Huffenberger, K., Hughes, J. P., Irwin, K. D., Koopman, B. J., Kosowsky, A. B., Li, D., McMahon, J., Munson, C., Nati, F., Newburgh, L., Niemack, M. D., Niraula, P., Page, L. A., Pappas, C. G., Salatino, M., Schillaci, A., Schmitt, B. L., Sehgal, N., Sherwin, B. D., Sievers, J. L., Simon, S. M., Spergel, D. N., Staggs, S. T., Stevens, J. R., Thornton, R., Van Lanen, J., Vavagiakis, E. M., Ward, J. T., and Wollack, E. J.

Published
2016
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12. The First Multichroic Polarimeter Array on the Atacama Cosmology Telescope: Characterization and Performance

Author

Ho, S. P., Pappas, C. G., Austermann, J., Beall, J. A., Becker, D., Choi, S. K., Datta, R., Duff, S. M., Gallardo, P. A., Grace, E., Hasselfield, M., Henderson, S. W., Hilton, G. C., Hubmayr, J., Koopman, B. J., Lanen, J. V., Li, D., McMahon, J., Nati, F., Niemack, M. D., Niraula, P., Salatino, M., Schillaci, A., Schmitt, B. L., Simon, S. M., Staggs, S. T., Stevens, J. R., Ward, J. T., Wollack, E. J., and Vavagiakis, E. M.

Published
2016
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13. Design and Deployment of a Multichroic Polarimeter Array on the Atacama Cosmology Telescope

Author

Datta, R., Austermann, J., Beall, J. A., Becker, D., Coughlin, K. P., Duff, S. M., Gallardo, P. A., Grace, E., Hasselfield, M., Henderson, S. W., Hilton, G. C., Ho, S. P., Hubmayr, J., Koopman, B. J., Lanen, J. V., Li, D., McMahon, J., Munson, C. D., Nati, F., Niemack, M. D., Page, L., Pappas, C. G., Salatino, M., Schmitt, B. L., Schillaci, A., Simon, S. M., Staggs, S. T., Stevens, J. R., Vavagiakis, E. M., Ward, J. T., and Wollack, E. J.

Published
2016
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14. High-Density Superconducting Cables for Advanced ACTPol

Author

Pappas, C. G., Austermann, J., Beall, J. A., Duff, S. M., Gallardo, P. A., Grace, E., Henderson, S. W., Ho, S. P., Koopman, B. J., Li, D., McMahon, J., Nati, F., Niemack, M. D., Niraula, P., Salatino, M., Schillaci, A., Schmitt, B. L., Simon, S. M., Staggs, S. T., Stevens, J. R., Vavagiakis, E. M., Ward, J. T., and Wollack, E. J.

Published
2016
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15. Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and Planck thermal Sunyaev-Zel'dovich effect observations. II. Modeling and constraints on halo pressure profiles

Author

A Pandey, S., Gatti, M., Baxter, E., Hill, J. C., Fang, X., Doux, C., Giannini, G., Raveri, M., Derose, J., Huang, H., Moser, E., Battaglia, N., Alarcon, A., Amon, A., Becker, M., Campos, A., Chang, C., Chen, R., Choi, A., Eckert, K., Elvin-Poole, J., Everett, S., Ferte, A., Harrison, I., Maccrann, N., Mccullough, J., Myles, J., Navarro Alsina, A., Prat, J., Rollins, R. P., Sanchez, C., Shin, T., Troxel, M., Tutusaus, I., Yin, B., Aguena, M., Allam, S., Andrade-Oliveira, F., Bernstein, G. M., Bertin, E., Bolliet, B., Bond, J. R., Brooks, D., Calabrese, E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cawthon, R., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Dunkley, J., Evrard, A. E., Ferraro, S., Ferrero, I., Flaugher, B., Fosalba, P., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Herner, K., Hincks, A. D., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hughes, J. P., Huterer, D., Jain, B., James, D. J., Jeltema, T., Krause, E., Kuehn, K., Lahav, O., Lima, M., Lokken, M., Madhavacheril, M. S., Maia, M. A. G., Mcmahon, J. J., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Moodley, K., Morgan, R., Nati, F., Niemack, M. D., Page, L., Palmese, A., Paz-Chinchón, F., Pieres, A., Plazas Malagón, A. A., Rodriguez-Monroy, M., Romer, A. K., Sanchez, E., Scarpine, V., Schaan, E., Serrano, S., Sevilla-Noarbe, I., Sheldon, E., Sherwin, B. D., Sifón, C., Smith, M., Soares-Santos, M., Spergel, D., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Varga, T. N., Weller, J., Wollack, E. J., Xu, Z., Des, Act, Collaboration, A Pandey, S., Gatti, M., Baxter, E., Hill, J. C., Fang, X., Doux, C., Giannini, G., Raveri, M., Derose, J., Huang, H., Moser, E., Battaglia, N., Alarcon, A., Amon, A., Becker, M., Campos, A., Chang, C., Chen, R., Choi, A., Eckert, K., Elvin-Poole, J., Everett, S., Ferte, A., Harrison, I., Maccrann, N., Mccullough, J., Myles, J., Navarro Alsina, A., Prat, J., Rollins, R. P., Sanchez, C., Shin, T., Troxel, M., Tutusaus, I., Yin, B., Aguena, M., Allam, S., Andrade-Oliveira, F., Bernstein, G. M., Bertin, E., Bolliet, B., Bond, J. R., Brooks, D., Calabrese, E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cawthon, R., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Dunkley, J., Evrard, A. E., Ferraro, S., Ferrero, I., Flaugher, B., Fosalba, P., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Herner, K., Hincks, A. D., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hughes, J. P., Huterer, D., Jain, B., James, D. J., Jeltema, T., Krause, E., Kuehn, K., Lahav, O., Lima, M., Lokken, M., Madhavacheril, M. S., Maia, M. A. G., Mcmahon, J. J., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Moodley, K., Morgan, R., Nati, F., Niemack, M. D., Page, L., Palmese, A., Paz-Chinchón, F., Pieres, A., Plazas Malagón, A. A., Rodriguez-Monroy, M., Romer, A. K., Sanchez, E., Scarpine, V., Schaan, E., Serrano, S., Sevilla-Noarbe, I., Sheldon, E., Sherwin, B. D., Sifón, C., Smith, M., Soares-Santos, M., Spergel, D., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Varga, T. N., Weller, J., Wollack, E. J., Xu, Z., Des, and Act, Collaboration

Subjects
Astrophysic, Astrophysics, Cosmology and Nongalactic Astrophysics
Abstract

Hot, ionized gas leaves an imprint on the cosmic microwave background via the thermal Sunyaev-Zel'dovich (tSZ) effect. The cross-correlation of gravitational lensing (which traces the projected mass) with the tSZ effect (which traces the projected gas pressure) is a powerful probe of the thermal state of ionized baryons throughout the Universe and is sensitive to effects such as baryonic feedback. In a companion paper (Gatti et al. Phys. Rev. D 105, 123525 (2022)PRVDAQ2470-0010), we present tomographic measurements and validation tests of the cross-correlation between Galaxy shear measurements from the first three years of observations of the Dark Energy Survey and tSZ measurements from a combination of Atacama Cosmology Telescope and Planck observations. In this work, we use the same measurements to constrain models for the pressure profiles of halos across a wide range of halo mass and redshift. We find evidence for reduced pressure in low-mass halos, consistent with predictions for the effects of feedback from active Galactic nuclei. We infer the hydrostatic mass bias (BM500c/MSZ) from our measurements, finding B=1.8±0.1 when adopting the Planck-preferred cosmological parameters. We additionally find that our measurements are consistent with a nonzero redshift evolution of B, with the correct sign and sufficient magnitude to explain the mass bias necessary to reconcile cluster count measurements with the Planck-preferred cosmology. Our analysis introduces a model for the impact of intrinsic alignments (IAs) of galaxy shapes on the shear-tSZ correlation. We show that IA can have a significant impact on these correlations at current noise levels.

Published
2022

19. A Study of Al–Mn Transition Edge Sensor Engineering for Stability

Author

George, E. M., Austermann, J. E., Beall, J. A., Becker, D., Benson, B. A., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Cho, H.-M., Crites, A. T., Dobbs, M. A., Everett, W., Halverson, N. W., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Hubmayr, J., Irwin, K. D., Li, D., Lueker, M., McMahon, J. J., Mehl, J., Montgomery, J., Natoli, T., Nibarger, J. P., Niemack, M. D., Novosad, V., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Story, K. T., Wang, G., Yefremenko, V., Yoon, K. W., and Young, E.

Published
2014
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20. Detection of the Pairwise Kinematic Sunyaev-Zel'dovich Effect with BOSS DR11 and the Atacama Cosmology Telescope

Author

De Bernardis, F, Aiola, S, Vavagiakis, E. M, Battaglia, N, Niemack, M. D, Beall, J, Becker, D. T, Bond, J. R, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, P. A, Halpern, M, Hand, N, Hasselfield, M, Henderson, S. W, Hill, J. C, Hilton, G. C, Hilton, M, Hincks, A. D, Hlozek, R, and Wollack, E. J

Subjects
Astrophysics
Abstract

We present a new measurement of the kinematic Sunyaev-Zel'dovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). Using 600 square degrees of overlapping sky area, we evaluate the mean pairwise baryon momentum associated with the positions of 50,000 bright galaxies in the BOSS DR11 Large Scale Structure catalog. A non-zero signal arises from the large-scale motions of halos containing the sample galaxies. The data fits an analytical signal model well, with the optical depth to microwave photon scattering as a free parameter determining the overall signal amplitude. We estimate the covariance matrix of the mean pairwise momentum as a function of galaxy separation, using microwave sky simulations, jackknife evaluation, and bootstrap estimates. The most conservative simulation-based errors give signal-to-noise estimates between 3.6 and 4.1 for varying galaxy luminosity cuts. We discuss how the other error determinations can lead to higher signal-to-noise values, and consider the impact of several possible systematic errors. Estimates of the optical depth from the average thermal Sunyaev-Zel'dovich signal at the sample galaxy positions are broadly consistent with those obtained from the mean pairwise momentum signal.

Published
2017
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21. Weak-Lensing Mass Calibration of the Atacama Cosmology Telescope Equatorial Sunyaev-Zeldovich Cluster Sample with the Canada-France-Hawaii Telescope Stripe 82 Survey

Author

Battaglia, N, Leauthaud, A, Miyatake, H, Hasseleld, M, Gralla, M. B, Allison, R, Bond, J. R, Calabrese, E, Crichton, D, Devlin, M. J, Dunkley, J, Dunner, R, Erben, T, Ferrara, S, Halpern, M, Hilton, M, Hill, J.C, Hincks, A. D, Hlozek, R, Huenberger, K. M, Hughes, J. P, Kneib, J. P, Kosowsky, A, Makler, M, Marriage, T. A, Menanteau, F, Miller, L, Moodley, K, Moraes, B, Niemack, M. D, Page, L, Shan, H, Sehgal, N, Sherwin, B. D, Sievers, J. L, Sifon, C, Spergel, D. N, Staggs, S. T, Taylor, J. E, Thornton, R, van Waerbeke, L, and Wollack, E. J

Subjects
Astrophysics
Abstract

Mass calibration uncertainty is the largest systematic effect for using clustersof galaxies to constrain cosmological parameters. We present weak lensing mass measurements from the Canada-France-Hawaii Telescope Stripe 82 Survey for galaxy clusters selected through their high signal-to-noise thermal Sunyaev-Zeldovich (tSZ) signal measured with the Atacama Cosmology Telescope (ACT). For a sample of 9 ACT clusters with a tSZ signal-to-noise greater than five, the average weak lensing mass is (4.8 plus or minus 0.8) times 10 (sup 14) solar mass, consistent with the tSZ mass estimate of (4.7 plus or minus 1.0) times 10 (sup 14) solar mass, which assumes a universal pressure profile for the cluster gas. Our results are consistent with previous weak-lensing measurements of tSZ-detected clusters from the Planck satellite. When comparing our results, we estimate the Eddington bias correction for the sample intersection of Planck and weak-lensing clusters which was previously excluded.

Published
2016
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22. A Giant Radio Halo in a Low-Mass Sz-selected Galaxy Cluster: ACT-CLJ0256.5+0006

Author

Knowles, Kendra, Intema, H. T, Baker, A. J, Bharadwaj, V, Bond, J. R, Cress, C, Gupta, N, Hajian, A, Hilton, M, Hincks, A. D, Hlozek, R, Hughes, J. P, Lindner, R. R, Marriage, T. A, Menanteau, F, Moodley, K, Niemack, M. D, Reese, E. D, Sievers, J, Sifon, C, Srianand, R, and Wollack, Edward J

Subjects
Astrophysics
Abstract

We present the detection of a giant radio halo (GRH) in the Sunyaev-Zel'dovich (SZ)- selected merging galaxy cluster ACT-CL J0256.5+ 0006 (z = 0.363), observed with the Giant Metrewave Radio Telescope at 325 and 610 MHz. We find this cluster to host a faint (S610 = 5.6 +/- 1.4mJy) radio halo with an angular extent of 2.6 arcmin, corresponding to 0.8 Mpc at the cluster redshift, qualifying it as a GRH. J0256 is one of the lowest mass systems, M500, SZ = (5.0 +/- 1.2) × 10(exp14) M, found to host a GRH. We measure the GRH at lower significance at 325 MHz (S325 = 10.3 +/- 5.3mJy), obtaining a spectral index measurement of α610 325 = 1.0+ 0.7 − 0.9. This result is consistent with the mean spectral index of the population of typical radio haloes, alpha = 1.2 +/- 0.2. Adopting the latter value, we determine a 1.4 GHz radio power of P1.4 GHz = (1.0 +/- 0.3) × 10(exp 24)W/Hz, placing this cluster within the scatter of known scaling relations. Various lines of evidence, including the intracluster medium morphology, suggest that ACT-CL J0256.5+ 0006 is composed of two subclusters. We determine a merger mass ratio of 7:4, and a line-of-sight velocity difference of v⊥ = 1880 +/- 210 km/s. We construct a simple merger model to infer relevant time-scales in the merger. From its location on the P1.4GHz-LX scaling relation, we infer that we observe ACT-CL J0256.5+ 0006 just before first core crossing.

Published
2016
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23. Cross-correlation of DES Y3 lensing and ACT/${\it Planck}$ thermal Sunyaev Zel'dovich Effect II: Modeling and constraints on halo pressure profiles

Author

Pandey, S., Gatti, M., Baxter, E., Hill, J. C., Fang, X., Doux, C., Giannini, G., Raveri, M., DeRose, J., Huang, H., Moser, E., Battaglia, N., Alarcon, A., Amon, A., Becker, M., Campos, A., Chang, C., Chen, R., Choi, A., Eckert, K., Elvin-Poole, J., Everett, S., Ferte, A., Harrison, I., Maccrann, N., Mccullough, J., Myles, J., Alsina, A. Navarro, Prat, J., Rollins, R. P., Sanchez, C., Shin, T., Troxel, M., Tutusaus, I., Yin, B., Aguena, M., Allam, S., Andrade-Oliveira, F., Bernstein, G. M., Bertin, E., Bolliet, B., Bond, J. R., Brooks, D., Calabrese, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cawthon, R., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Dunkley, J., Evrard, A. E., Ferraro, S., Ferrero, I., Flaugher, B., Fosalba, P., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Herner, K., Hincks, A. D., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hughes, J. P., Huterer, D., Jain, B., James, D. J., Jeltema, T., Krause, E., Kuehn, K., Lahav, O., Lima, M., Lokken, M., Madhavacheril, M. S., Maia, M. A. G., Mcmahon, J. J., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Moodley, K., Morgan, R., Nati, F., Niemack, M. D., Page, L., Palmese, A., Paz-Chinchon, F., Pieres, A., Malagon, A. A. Plazas, Rodriguez-Monroy, M., Romer, A. K., Sanchez, E., Scarpine, V., Schaan, E., Serrano, S., Sevilla-Noarbe, I., Sheldon, E., Sherwin, B. D., Sifon, C., Smith, M., Soares-Santos, M., Spergel, D., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Varga, T. N., Weller, J., Wollack, E. J., and Xu, Z.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Hot, ionized gas leaves an imprint on the cosmic microwave background via the thermal Sunyaev Zel'dovich (tSZ) effect. The cross-correlation of gravitational lensing (which traces the projected mass) with the tSZ effect (which traces the projected gas pressure) is a powerful probe of the thermal state of ionized baryons throughout the Universe, and is sensitive to effects such as baryonic feedback. In a companion paper (Gatti et al. 2021), we present tomographic measurements and validation tests of the cross-correlation between galaxy shear measurements from the first three years of observations of the Dark Energy Survey, and tSZ measurements from a combination of Atacama Cosmology Telescope and ${\it Planck}$ observations. In this work, we use the same measurements to constrain models for the pressure profiles of halos across a wide range of halo mass and redshift. We find evidence for reduced pressure in low mass halos, consistent with predictions for the effects of feedback from active galactic nuclei. We infer the hydrostatic mass bias ($B \equiv M_{500c}/M_{\rm SZ}$) from our measurements, finding $B = 1.8\pm0.1$ when adopting the ${\it Planck}$-preferred cosmological parameters. We additionally find that our measurements are consistent with a non-zero redshift evolution of $B$, with the correct sign and sufficient magnitude to explain the mass bias necessary to reconcile cluster count measurements with the ${\it Planck}$-preferred cosmology. Our analysis introduces a model for the impact of intrinsic alignments (IA) of galaxy shapes on the shear-tSZ correlation. We show that IA can have a significant impact on these correlations at current noise levels., 22 pages, 13 figures. Comments welcome

Published
2021

26. An All Silicon Feedhorn-Coupled Focal Plane for Cosmic Microwave Background Polarimetry

Author

Hubmayr, J., Appel, J. W., Austermann, J. E., Beall, J. A., Becker, D., Benson, B. A., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Cho, H. M., Crites, A. T., Essinger-Hileman, T., Fox, A., George, E. M., Halverson, N. W., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Irwin, K. D., Lee, A. T., Li, D., McMahon, J., Mehl, J., Natoli, T., Niemack, M. D., Newburgh, L. B., Nibarger, J. P., Parker, L. P., Schmitt, B. L., Staggs, S. T., Van Lanen, J., Wollack, E. J., and Yoon, K. W.

Published
2012
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27. A Kilopixel Array of TES Bolometers for ACT: Development, Testing, and First Light

Author

Niemack, M. D., Zhao, Y., Wollack, E., Thornton, R., Switzer, E. R., Swetz, D. S., Staggs, S. T., Page, L., Stryzak, O., Moseley, H., Marriage, T. A., Limon, M., Lau, J. M., Klein, J., Kaul, M., Jarosik, N., Irwin, K. D., Hincks, A. D., Hilton, G. C., Halpern, M., Fowler, J. W., Fisher, R. P., Dünner, R., Doriese, W. B., Dicker, S. R., Devlin, M. J., Chervenak, J., Burger, B., Battistelli, E. S., Appel, J., Amiri, M., Allen, C., and Aboobaker, A. M.

Published
2008
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28. Feedhorn-Coupled Transition-Edge Superconducting Bolometer Arrays for Cosmic Microwave Background Polarimetry

Author

Hubmayr, J, Austermann, J, Beall, J, Becker, D, Cho, H.-M, Datta, R, Duff, S. M, Grace, E, Halverson, N, Henderson, S. W, Hilton, G. C, Ho, S. P, Irwin, K. D, Koopman, B. J, Li, D, McMahon, J, Munson, C, Niemack, M. D, Pappas, C, Schmitt, B. L, Simon, S. M, Staggs, S. T, Van Lanen, J, and Wollack, Edward J

Subjects
Astrophysics
Abstract

NIST produces large-format, dual-polarization-sensitive detector arrays for a broad range of frequencies (30-1400 GHz). Such arrays enable a host of astrophysical measurements. Detectors optimized for cosmic microwave background observations are monolithic, polarization-sensitive arrays based on feedhorn and planar Nb antenna-coupled transition-edge superconducting (TES) bolometers. Recent designs achieve multiband, polarimetric sensing within each spatial pixel. In this proceeding, we describe our multichroic, feedhorn-coupled design; demonstrate performance at 70-380 GHz; and comment on current developments for implementation of these detector arrays in the advanced Atacama Cosmology Telescope receiver

Published
2015

29. ACTPol: On-Sky Performance and Characterization

Author

Grace, E, Beall, J, Bond, J. R, Cho, H. M, Datta, R, Devlin, M. J, Dunner, R, Fox, A. E, Gallardo, P, Hasselfield, M, Henderson, S, Hilton, G. C, Hincks, A. D, Hlozek, R, Hubmayr, J, Irwin, K, Klein, J, Koopman, B, Li, D, Lungu, M, Newburgh, L, Nibarger, J. P, Niemack, M. D, Maurin, L, and Wollack, E. J

Subjects
Astrophysics, Instrumentation And Photography
Abstract

ACTPol is the polarization-sensitive receiver on the Atacama Cosmology Telescope. ACTPol enables sensitive millimeter wavelength measurements of the temperature and polarization anisotropies of the Cosmic Microwave Background (CMB) at arcminute angular scales. These measurements are designed to explore the process of cosmic structure formation, constrain or determine the sum of the neutrino masses, probe dark energy, and provide a foundation for a host of other cosmological tests. We present an overview of the first season of ACTPol observations focusing on the optimization and calibration of the first detector array as well as detailing the on-sky performance.

Published
2014
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30. Large-aperture Wide-bandwidth Antireflection-coated Silicon Lenses for Millimeter Wavelengths

Author

Datta, R, Munson, C. D, Niemack, M. D, McMahon, J. J, Britton, J, Wollack, Edward J, Beall, J, Devlin, M. J, Fowler, J, Gallardo, P, Hubmayr, J, Irwin, K, Newburgh, L, Nibarger, J. P, Page, L, Quijada, Manuel A, Schmitt, B. L, Staggs, S. T, Thornton, R, and Zhang, L

Subjects
Astrophysics
Abstract

The increasing scale of cryogenic detector arrays for submillimeter and millimeter wavelength astrophysics has led to the need for large aperture, high index of refraction, low loss, cryogenic refracting optics. Silicon with n 3.4, low loss, and high thermal conductivity is a nearly optimal material for these purposes but requires an antireflection (AR) coating with broad bandwidth, low loss, low reflectance, and a matched coefficient of thermal expansion. We present an AR coating for curved silicon optics comprised of subwavelength features cut into the lens surface with a custom three-axis silicon dicing saw. These features constitute a metamaterial that behaves as a simple dielectric coating.We have fabricated silicon lenses as large as 33.4 cm in diameter with micromachined layers optimized for use between 125 and 165 GHz. Our design reduces average reflections to a few tenths of a percent for angles of incidence up to 30deg with low cross polarization.We describe the design, tolerance, manufacture, and measurements of these coatings and present measurements of the optical properties of silicon at millimeter wavelengths at cryogenic and room temperatures. This coating and lens fabrication approach is applicable from centimeter to submillimeter wavelengths and can be used to fabricate coatings with greater than octave bandwidth.

Published
2013
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31. Large-Aperture Wide-Bandwidth Anti-Reflection-Coated Silicon Lenses for Millimeter Wavelengths

Author

Datta, R, Munson, C. D, Niemack, M. D, McMahon, J. J, Britton, J, Wollack, E. J, Beall, J, Devlin, M. J, Fowler, J, Gallardo, P, Hubmayr, J, Irwin, K, Newburgh, L, Nibarger, J. P, Page, L, Quijada, M. A, Schmitt, B. L, Staggs, S. T, Thornton, R, and Zhang, L

Subjects
Optics
Abstract

The increasing scale of cryogenic detector arrays for sub-millimeter and millimeter wavelength astrophysics has led to the need for large aperture, high index of refraction, low loss, cryogenic refracting optics. Silicon with n = 3.4, low loss, and relatively high thermal conductivity is a nearly optimal material for these purposes, but requires an antireflection (AR) coating with broad bandwidth, low loss, low reflectance, and a matched coffecient of thermal expansion. We present an AR coating for curved silicon optics comprised of subwavelength features cut into the lens surface with a custom three axis silicon dicing saw. These features constitute a metamaterial that behaves as a simple dielectric coating. We have fabricated and coated silicon lenses as large as 33.4 cm in diameter with coatings optimized for use between 125-165 GHz. Our design reduces average reflections to a few tenths of a percent for angles of incidence up to 30 deg. with low cross-polarization. We describe the design, tolerance, manufacture, and measurements of these coatings and present measurements of the optical properties of silicon at millimeter wavelengths at cryogenic and room temperatures. This coating and lens fabrication approach is applicable from centimeter to sub-millimeter wavelengths and can be used to fabricate coatings with greater than octave bandwidth.

Published
2013

32. The Atacama Cosmology Telescope: The Receiver and Instrumentation

Author

Swetz, D. S, Ade, P. A. R, Amiri, M, Appel, J. W, Burger, B, Devlin, M. J, Dicker, S. R, Doriese, W. B, Essinger-Hileman, T, Fisher, R. P, Fowler, J. W, Halpern, M, Hasselfield, M, Hilton, G. C, Hincks, A. D, Irwin, K. D, Jarosik, N, Kaul, M, Klein, J, Marsden, D, Thornton, R, Mauskopf, P, Niemack, M. D, Page, L. A, and Parker, L

Subjects
Astronomy
Abstract

The Atacama Cosmology Telescope was designed to measure small-scale anisotropies in the Cosmic Microwave Background and detect galaxy clusters through the Sunyaev-Zel'dovich effect. The instrument is located on Cerro Taco in the Atacama Desert, at an altitude of 5190 meters. A six-met.er off-axis Gregorian telescope feeds a new type of cryogenic receiver, the Millimeter Bolometer Array Camera. The receiver features three WOO-element arrays of transition-edge sensor bolometers for observations at 148 GHz, 218 GHz, and 277 GHz. Each detector array is fed by free space mm-wave optics. Each frequency band has a field of view of approximately 22' x 26'. The telescope was commissioned in 2007 and has completed its third year of operations. We discuss the major components of the telescope, camera, and related systems, and summarize the instrument performance.

Published
2010

35. Neutrino Physics from the Cosmic Microwave Background and Large Scale Structure

Author

Abazajian, K. N., Arnold, K., Austermann, J., Benson, B. A., Bischoff, C., Bock, J., Bond, J. R., Borrill, J., Calabrese, E., Carlstrom, J. E., Carvalho, C. S., Chang, C. L., Chiang, H. C., Church, S., Cooray, A., Crawford, T. M., Dawson, K. S., Das, S., Devlin, M. J., Dobbs, M., Dodelson, S., Doré, O., Dunkley, J., Errard, J., Fraisse, A., Gallicchio, J., Halverson, N. W., Hanany, S., Hildebrandt, S. R., Hincks, A., Hlozek, R., Holder, G., Holzapfel, W. L., Honscheid, K., Hu, W., Hubmayr, J., Irwin, K., Jones, W. C., Kamionkowski, M., Keating, B., Keisler, R., Knox, L., Komatsu, E., Kovac, J., Kuo, C.-L., Lawrence, C., Lee, A. T., Leitch, E., Linder, E., Lubin, P., McMahon, J., Miller, A., Newburgh, L., Niemack, M. D., Nguyen, H., Nguyen, H. T., Page, L., Pryke, C., Reichardt, C. L., Ruhl, J. E., Sehgal, N., Seljak, U., Sievers, J., Silverstein, E., Slosar, A., Smith, K. M., Spergel, D., Staggs, S. T., Stark, A., Stompor, R., Vieregg, A. G., Wang, G., Watson, S., Wollack, E. J., Wu, W. L. K., Yoon, K. W., Zahn, O., Department of Geological Sciences [BYU], Brigham Young University (BYU), Computing and Mathematical Sciences [Pasadena]], California Institute of Technology (CALTECH), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), State Key Lab of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University [Shanghai], AstroParticule et Cosmologie (APC (UMR_7164)), 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, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Office National des Forêts (ONF), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), BAE Systems, McGill University = Université McGill [Montréal, Canada], 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), Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES), University of Minnesota [Twin Cities], University of Minnesota System, Chengdu University of Technology (CDUT), National Institute of Standards and Technology [Gaithersburg] (NIST), Laboratoire de microbiologie, Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Raymond Poincaré [AP-HP], Institut de biologie et chimie des protéines [Lyon] (IBCP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Department of Physics [Kansas], Kansas State University, APC - Gravitation (APC-Gravitation), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-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)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), OPALA (Omnipresent and Pervasive Systems Laboratory), Universidade Estadual do Piaui, HISPEC, Graduate Institute of Electronics Engineering [Taipei] (GIEE), National Taiwan University [Taiwan] (NTU), University of Southern California (USC), Institute of Molecular and Cell Biology, Singapour, Department of Mathematics, Pedagogical University of Quynhon, Pedagogical University of Quynhon, Universitat Konstanz, University of Konstanz, Molecular Psychiatry Laboratory, University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System-Molecular and Behavioral Neuroscience Institute, Department of Engineering Science and Ocean Engineering, 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), McGill University, Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-AP-HP Hôpital Raymond Poincaré [Garches], Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Large scale structure, Astrophysics::Cosmology and Extragalactic Astrophysics, Atomic, Cosmic microwave background, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Particle and Plasma Physics, High Energy Physics - Phenomenology (hep-ph), Nuclear, Neutrinos, ComputingMilieux_MISCELLANEOUS, [PHYS]Physics [physics], Molecular, hep-ph, Astronomy and Astrophysics, Nuclear & Particles Physics, Cosmology, 3. Good health, High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], astro-ph.CO, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

This is a report on the status and prospects of the quantification of neutrino properties through the cosmological neutrino background for the Cosmic Frontier of the Division of Particles and Fields Community Summer Study long-term planning exercise. Experiments planned and underway are prepared to study the cosmological neutrino background in detail via its influence on distance-redshift relations and the growth of structure. The program for the next decade described in this document, including upcoming spectroscopic galaxy surveys eBOSS and DESI and a new Stage-IV CMB polarization experiment CMB-S4, will achieve sigma(sum m_nu) = 16 meV and sigma(N_eff) = 0.020. Such a mass measurement will produce a high significance detection of non-zero sum m_nu, whose lower bound derived from atmospheric and solar neutrino oscillation data is about 58 meV. If neutrinos have a minimal normal mass hierarchy, this measurement will definitively rule out the inverted neutrino mass hierarchy, shedding light on one of the most puzzling aspects of the Standard Model of particle physics --- the origin of mass. This precise a measurement of N_eff will allow for high sensitivity to any light and dark degrees of freedom produced in the big bang and a precision test of the standard cosmological model prediction that N_eff = 3.046., Comment: Report from the "Dark Energy and CMB" working group for the American Physical Society's Division of Particles and Fields long-term planning exercise ("Snowmass"); v3: references, discussion added; matching version accepted for publication in Astropart. Phys

Published
2013
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36. Inflation Physics from the Cosmic Microwave Background and Large Scale Structure

Author

Abazajian, K. N., Arnold, K., Austermann, J., Benson, B. A., Bischoff, C., Bock, J., Bond, J. R., Borrill, J., Buder, I., Burke, D. L., Calabrese, E., Carlstrom, J. E., Carvalho, C. S., Chang, C. L., Chiang, H. C., Church, S., Cooray, A., Crawford, T. M., Crill, B. P., Dawson, K. S., Das, S., Devlin, M. J., Dobbs, M., Dodelson, S., Doré, O., Dunkley, J., Feng, J. L., Fraisse, A., Gallicchio, J., Giddings, S. B., Green, D., Halverson, N. W., Hanany, S., Hanson, D., Hildebrandt, S. R., Hincks, A., Hlozek, R., Holder, G., Holzapfel, W. L., Honscheid, K., Horowitz, G., Hu, W., Hubmayr, J., Irwin, K., Jackson, M., Jones, W. C., Kallosh, R., Kamionkowski, M., Keating, B., Keisler, R., Kinney, W., Knox, L., Komatsu, E., Kovac, J., Kuo, C.-L., Kusaka, A., Lawrence, C., Lee, A. T., Leitch, E., Linde, A., Linder, E., Lubin, P., Maldacena, J., Martinec, E., Mcmahon, J., Miller, A., Mukhanov, V., Newburgh, L., Niemack, M. D., Nguyen, H., Nguyen, H. T., Page, L., Pryke, C., Reichardt, C. L., Ruhl, J. E., Sehgal, N., Seljak, U., Senatore, L., Sievers, J., Silverstein, E., Slosar, A., Smith, K. M., Spergel, D., Staggs, S. T., Stark, A., Stompor, R., Vieregg, A. G., Wang, G., Watson, S., Wollack, E. J., Wu, W. L. K., Yoon, K. W., Zahn, O., Zaldarriaga, M., OPALA (Omnipresent and Pervasive Systems Laboratory), Universidade Estadual do Piaui, HISPEC, Graduate Institute of Electronics Engineering [Taipei] (GIEE), National Taiwan University [Taiwan] (NTU), Department of Immunology, St Jude Children's Research Hospital, Laboratoire de physique des interfaces et des couches minces [Palaiseau] (LPICM), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Department of Earth and Environment, Boston University, Boston University [Boston] (BU), University of Southern California (USC), Institute of Molecular and Cell Biology, Singapour, Carnegie Institution for Science [Washington], School of Natural Sciences, Institute for Advanced Study, Princeton University, University of Chicago, Laboratoire des Propriétés Mécaniques et Thermodynamiques des Matériaux (LPMTM), Université Paris 13 (UP13)-Institut Galilée-Centre National de la Recherche Scientifique (CNRS), Department of Mathematics, Pedagogical University of Quynhon, Pedagogical University of Quynhon, Universitat Konstanz, University of Konstanz, 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), Molecular Psychiatry Laboratory, University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System-Molecular and Behavioral Neuroscience Institute, Department of Engineering Science and Ocean Engineering, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Centre National de la Recherche Scientifique (CNRS)-Institut Galilée-Université Paris 13 (UP13), 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), Carnegie Institution for Science, 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, and 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)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::Instrumentation and Methods for Astrophysics, Molecular, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, Nuclear & Particles Physics, Atomic, Inflation, Early Universe, Cosmology, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Particle and Plasma Physics, 13. Climate action, Cosmic Microwave Background, astro-ph.CO, Nuclear, Large-scale Structure, ComputingMilieux_MISCELLANEOUS, Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Fluctuations in the intensity and polarization of the cosmic microwave background (CMB) and the large-scale distribution of matter in the universe each contain clues about the nature of the earliest moments of time. The next generation of CMB and large-scale structure (LSS) experiments are poised to test the leading paradigm for these earliest moments---the theory of cosmic inflation---and to detect the imprints of the inflationary epoch, thereby dramatically increasing our understanding of fundamental physics and the early universe. A future CMB experiment with sufficient angular resolution and frequency coverage that surveys at least 1% of the sky to a depth of 1 uK-arcmin can deliver a constraint on the tensor-to-scalar ratio that will either result in a 5-sigma measurement of the energy scale of inflation or rule out all large-field inflation models, even in the presence of foregrounds and the gravitational lensing B-mode signal. LSS experiments, particularly spectroscopic surveys such as the Dark Energy Spectroscopic Instrument, will complement the CMB effort by improving current constraints on running of the spectral index by up to a factor of four, improving constraints on curvature by a factor of ten, and providing non-Gaussianity constraints that are competitive with the current CMB bounds., Report from the "Dark Energy and CMB" working group for the American Physical Society's Division of Particles and Fields long-term planning exercise ("Snowmass"). Current version matches what will appear in the Snowmass 2013 issue of Astroparticle Physics

Published
2013
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37. The Atacama B-Mode Search: CMB Polarimetry with Transition-Edge-Sensor Bolometers

Author

Essinger-Hileman, T., Appel, J. W., Beall, J. A., Cho, H. M., Fowler, J., Halpern, M., Hasselfield, M., Irwin, K. D., Marriage, T. A., Niemack, M. D., Page, L., Parker, L. P., Pufu, S., Staggs, S. T., Stryzak, O., Visnjic, C., Yoon, K. W., and Zhao, Y.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics::Instrumentation and Detectors, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Atacama B-mode Search (ABS) experiment is a 145 GHz polarimeter designed to measure the B-mode polarization of the Cosmic Microwave Background (CMB) at large angular scales. The ABS instrument will ship to the Atacama Desert of Chile fully tested and ready to observe in 2010. ABS will image large-angular-scale CMB polarization anisotropies onto a focal plane of 240 feedhorn-coupled, transition-edge sensor (TES) polarimeters, using a cryogenic crossed-Dragone design. The ABS detectors, which are fabricated at NIST, use orthomode transducers to couple orthogonal polarizations of incoming radiation onto separate TES bolometers. The incoming radiation is modulated by an ambient-temperature half-wave plate in front of the vacuum window at an aperture stop. Preliminary detector characterization indicates that the ABS detectors can achieve a sensitivity of 300 $\mu K \sqrt{s}$ in the field. This paper describes the ABS optical design and detector readout scheme, including feedhorn design and performance, magnetic shielding, focal plane architecture, and cryogenic electronics., Comment: 4 pages, 5 figures, Proceedings of the Thirteenth International Conference on Low-Temperature Detectors

Published
2010

38. Optomechanical design and performance of a compact three-frequency camera for the MBAC receiver on the Atacama Cosmology Telescope

Author

Thornton, R. J., Ade, P. A. R., Allen, C., Amiri, M., Appel, J., Battistelli, Elia Stefano, Burger, B., Chervenak, J., Devlin, M. J., Dicker, S. R., Doriese, W. B., ESSINGER HILEMAN, T., Fisher, R. P., Fowler, J. W., Halpern, M., Hargrave, P. C., Hasselfield, M., Hilton, G. C., Hincks, A. D., Irwin, K. D., Jarosik, N., Kaul, M., Klein, J., Lau, J. M., Limon, M., Marriage, T. A., Martocci, K., Mauskopf, P., Moseley, H., Niemack, M. D., Page, L., Parker, L. P., Reidel, J., Reintsema, C. D., Staggs, S. T., Stryzak, O. R., Swetz, D. S., Switzer, E. R., Tucker, C., Wollack, E. J., and Zhao, Y.

Subjects
millimeter camera, mechanical design, cryogenic, millimeter camera, CMB telescope, mechanical design, cryogenic, CMB telescope
Published
2008

39. On the redshift distribution and physical properties of ACT-selected DSFGs.

Author

Su, T., Marriage, T. A., Asboth, V., Baker, A. J., Bond, J. R., Crichton, D., Devlin, M. J., Dünner, R., Farrah, D., Frayer, D. T., Gralla, M. B., Hall, K., Halpern, M., Harris, A. I., Hilton, M., Hincks, A. D., Hughes, J. P., Niemack, M. D., Page, L. A., and Partridge, B.

Subjects
GALACTIC redshift, STELLAR evolution, COSMIC dust, GRAVITATIONAL lenses, STARBURSTS, BLACK body (Physics)
Abstract

We present multi-wavelength detections of nine candidate gravitationally lensed dusty starforming galaxies (DSFGs) selected at 218 GHz (1.4 mm) from the Atacama Cosmology Telescope (ACT) equatorial survey. Among the brightest ACT sources, these represent the subset of the total ACT sample lying in Herschel SPIRE fields, and all nine of the 218 GHz detections were found to have bright Herschel counterparts. By fitting their spectral energy distributions (SEDs) with a modified blackbody model with power-law temperature distribution, we find the sample has a median redshift of z = 4.1-1.0+1.1 (68 per cent confidence interval), as expected for 218 GHz selection, and an apparent total infrared luminosity of log10(μLIR/Lʘ) = 3.86-1.9+0.33, which suggests that they are either strongly lensed sources or unresolved collections of unlensed DSFGs. The effective apparent diameter of the sample is √μd = 4.2-1.0+1.7 kpc, further evidence of strong lensing or multiplicity, since the typical diameter of DSFGs is 1.0-2.5 kpc. We emphasize that the effective apparent diameter derives from SED modelling without the assumption of optically thin dust (as opposed to image morphology). We find that the sources have substantial optical depth (τ = 4.2-1.9+3.7) to dust around the peak in the modified blackbody spectrum (λobs ≤ 500 μm), a result that is robust to model choice. [ABSTRACT FROM AUTHOR]

Published
2017
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40. Measurements of Bolometer Uniformity for Feedhorn Coupled TES Polarimeters.

Author

Austermann, J. E., Niemack, M. D., Appel, J. W., Beall, J. A., Becker, D., Bennett, D. A., Benson, B. A., Bleem, L. E., Britton, J., Carlstrom, J. E., Chang, C. L., Cho, H. M., Crites, A. T., Essinger-Hileman, T., Everett, W., Halverson, N. W., Henning, J. W., Hilton, G. C., Irwin, K. D., and McMahon, J.

Subjects
*COSMIC background radiation, *ANISOTROPY, *DETECTORS, *SEMICONDUCTOR wafers, *THERMAL properties
Abstract

We are developing feedhorn-coupled TES polarimeters to measure the polarization anisotropies of the cosmic microwave background (CMB) radiation. These devices will be deployed in arrays of hundreds to thousands and will be measured using multiplexed SQUID readout electronics. Since multiplexed devices share common circuitry, a high degree of uniformity is required in the electrothermal properties of the TES bolometers and readout circuits in order to operate all channels simultaneously with high sensitivity. Our cryogenic test bed can probe dozens of devices simultaneously, thus providing useful detector statistics on relatively short time scales. We describe the TES bolometer design and present dark (no optical loading) measurements of the electrical and thermal properties and uniformity of prototype bolometers across two 3-inch diameter production wafers, including (standard deviation in parenthesis): TES transition temperature (∼1%), normal resistance (∼10%), thermal conductance (<=10%), time constant (∼20%), shunt resistance (<=5%), and noise properties. [ABSTRACT FROM AUTHOR]

Published
2009
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41. Progress Toward Corrugated Feed Horn Arrays in Silicon.

Author

Britton, J., Yoon, K. W., Beall, J. A., Becker, D., Cho, H. M., Hilton, G. C., Niemack, M. D., and Irwin, K. D.

Subjects
SEMICONDUCTOR wafers, COSMIC background radiation, PROPERTIES of matter, WAVEGUIDES
Abstract

We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single-mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold-coated stacks of micro-machined silicon wafers. As a first step, Au-coated Si waveguides with a circular, corrugated cross section were fabricated; their attenuation was measured to be less than 0.15 dB/cm from 80 to 110 GHz at room temperature. To ease the manufacture of horn arrays, electrolytic deposition of Au on degenerate Si without a metal seed layer was demonstrated. An apparatus for measuring the radiation pattern, optical efficiency, and spectral band-pass of prototype horns is described. Feed horn arrays made of silicon may find use in measurements of the polarization anisotropy of the cosmic microwave background radiation. [ABSTRACT FROM AUTHOR]

Published
2009
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42. The Atacama B-Mode Search: CMB Polarimetry with Transition-Edge-Sensor Bolometers.

Author

Essinger-Hileman, T., Appel, J. W., Beal, J. A., Cho, H. M., Fowler, J., Halpern, M., Hasselfield, M., Irwin, K. D., Marriage, T. A., Niemack, M. D., Page, L., Parker, L. P., Pufu, S., Staggs, S. T., Stryzak, O., Visnjic, C., Yoon, K. W., and Zhao, Y.

Subjects
POLARIMETRY, DETECTORS, ENGINEERING instruments, COSMIC background radiation, TRANSDUCERS
Abstract

The Atacama B-mode Search (ABS) experiment is a 145 GHz polarimeter designed to measure the B-mode polarization of the Cosmic Microwave Background (CMB) at large angular scales. The ABS instrument will ship to the Atacama Desert of Chile fully tested and ready to observe in 2010. ABS will image large-angular-scale CMB polarization anisotropies onto a focal plane of 240 feedhorn-coupled, transition-edge sensor (TES) polarimeters, using a cryogenic crossed-Dragone design. The ABS detectors, which are fabricated at NIST, use orthomode transducers to couple orthogonal polarizations of incoming radiation onto separate TES bolometers. The incoming radiation is modulated by an ambient-temperature half-wave plate in front of the vacuum window at an aperture stop. Preliminary detector characterization indicates that the ABS detectors can achieve a sensitivity of [formula] in the field. This paper describes the ABS optical design and detector readout scheme, including feedhorn design and performance, magnetic shielding, focal plane architecture, and cryogenic electronics. [ABSTRACT FROM AUTHOR]

Published
2009
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43. Al-Mn Transition Edge Sensors for Cosmic Microwave Background Polarimeters.

Author

Schmidt, D. R., Cho, H.-M., Hubmayr, J., Lowell, P., Niemack, M. D., O'Neil, G. C., Ullom, J. N., Yoon, K. W., Irwin, K. D., Holzapfel, W. L., Lueker, M., George, E. M., and Shirokoff, E.

Subjects
COSMIC background radiation, POLARISCOPE, ORTHOGONAL frequency division multiplexing, MANGANESE compounds, BANDWIDTHS, SUPERCONDUCTING quantum interference devices, TEMPERATURE measurements, OPTICAL detectors, THIN films
Abstract

Superconducting transition edge sensors (TES) require superconducting films with transition temperatures (Tc) and properties that can be tailored to the particular requirements of individual applications. We have been developing Al-Mn films with a tunable Tc. The addition of Mn to Al suppresses Tc, but does not significantly broaden the superconducting density of states of the Al. We can produce films with Tc from below 50 mK to 1.4 K through adjustment of the Mn concentration. Since this is a bulk effect, Tc is not as dependent on precise control of film thickness as in the standard bilayer approach for TESs. We have previously used Al-Mn to fabricate TES sensors for x-ray microcalorimeters targeted for read-out with time division SQUID multiplexing schemes. In this work, we explore the properties of Al-Mn in a regime well suited for frequency division multiplexing. We have also fabricated prototype Al-Mn cosmic microwave background polarimeters for the South Pole Telescope and will show initial measurements of these sensors. [ABSTRACT FROM AUTHOR]

Published
2011
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44. Code-division SQUID multiplexing.

Author

Niemack, M. D., Beyer, J., Cho, H. M., Doriese, W. B., Hilton, G. C., Irwin, K. D., Reintsema, C. D., Schmidt, D. R., Ullom, J. N., and Vale, L. R.

Subjects
*MULTIPLEXING, *SUPERCONDUCTORS, *QUANTUM interference, *DETECTORS, *CONTINUUM damage mechanics
Abstract

Multiplexed superconducting quantum interference device (SQUID) readout systems are critical for measuring large arrays of superconducting transition-edge sensors (TES). We demonstrate a code-division SQUID multiplexing (CDM) architecture that is modulated by Walsh codes. Measurements and simulations of a prototype multiplexer show that this modulation scheme is not degraded by SQUID-noise aliasing, suppresses parasitic pickup, and has low levels of crosstalk. These properties enable this architecture to scale to large TES arrays. Furthermore, CDM modulation suppresses the 1/f knee in the noise to below 20 mHz, suggesting the use of this circuit for low-frequency-noise mitigation in more general SQUID applications. [ABSTRACT FROM AUTHOR]

Published
2010
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45. Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and P l a n c k thermal Sunyaev-Zel’dovich effect observations. II. Modeling and constraints on halo pressure profiles

Author

Pandey, S., Gatti, M., Baxter, E., Hill, J. C., Fang, X., Doux, C., Giannini, G., Raveri, M., DeRose, J., Huang, H., Moser, E., Battaglia, N., Alarcon, A., Amon, A., Becker, M., Campos, A., Chang, C., Chen, R., Choi, A., Eckert, K., Elvin-Poole, J., Everett, S., Ferte, A., Harrison, I., Maccrann, N., Mccullough, J., Myles, J., Navarro Alsina, A., Prat, J., Rollins, R. P., Sanchez, C., Shin, T., Troxel, M., Tutusaus, I., Yin, B., Aguena, M., Allam, S., Andrade-Oliveira, F., Bernstein, G. M., Bertin, E., Bolliet, B., Bond, J. R., Brooks, D., Calabrese, E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cawthon, R., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Dunkley, J., Evrard, A. E., Ferraro, S., Ferrero, I., Flaugher, B., Fosalba, P., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Herner, K., Hincks, A. D., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hughes, J. P., Huterer, D., Jain, B., James, D. J., Jeltema, T., Krause, E., Kuehn, K., Lahav, O., Lima, M., Lokken, M., Madhavacheril, M. S., Maia, M. A. G., Mcmahon, J. J., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Moodley, K., Morgan, R., Nati, F., Niemack, M. D., Page, L., Palmese, A., Paz-Chinchón, F., Pieres, A., Plazas Malagón, A. A., Rodriguez-Monroy, M., Romer, A. K., Sanchez, E., Scarpine, V., Schaan, E., Serrano, S., Sevilla-Noarbe, I., Sheldon, E., Sherwin, B. D., Sifón, C., Smith, M., Soares-Santos, M., Spergel, D., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Varga, T. N., Weller, J., Wollack, E. J., and Xu, Z.

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47. Atacama Cosmology Telescope measurements of a large sample of candidates from the Massive and Distant Clusters of WISE Survey: Sunyaev-Zeldovich effect confirmation of MaDCoWS candidates using ACT

Author

Suzanne T. Staggs, Dongwon Han, Alessandro Schillaci, Kavilan Moodley, Charles Romero, Anthony H. Gonzalez, Simon Dicker, Maria Salatino, Zhilei Xu, Tanay Bhandarkar, Mark Brodwin, Neelima Sehgal, Alex Manduca, Federico Nati, Spencer A. Stanford, Eve M. Vavagiakis, Robert Thornton, Luca Di Mascolo, Jo Dunkley, Brian J. Koopman, Matt Hilton, Bruce Partridge, Mark J. Devlin, Steve K. Choi, Edward J. Wollack, Tony Mroczkowski, Michael D. Niemack, Kenda Knowles, Lyman A. Page, Stefania Amodeo, Nick Battaglia, Cristóbal Sifón, Amanda MacInnis, Kevin M. Huffenberger, Ningfeng Zhu, John P. Hughes, Ian Lowe, John Orlowski-Scherer, Orlowski-Scherer, J, Di Mascolo, L, Bhandarkar, T, Manduca, A, Mroczkowski, T, Amodeo, S, Battaglia, N, Brodwin, M, Choi, S, Devlin, M, Dicker, S, Dunkley, J, Gonzalez, A, Han, D, Hilton, M, Huffenberger, K, Hughes, J, Macinnis, A, Knowles, K, Koopman, B, Lowe, I, Moodley, K, Nati, F, Niemack, M, Page, L, Partridge, B, Romero, C, Salatino, M, Schillaci, A, Sehgal, N, Sifon, C, Staggs, S, Stanford, S, Thornton, R, Vavagiakis, E, Wollack, E, Xu, Z, Zhu, N, Orlowski-Scherer, J., Di Mascolo, L., Bhandarkar, T., Manduca, A., Mroczkowski, T., Amodeo, S., Battaglia, N., Brodwin, M., Choi, S. K., Devlin, M., Dicker, S., Dunkley, J., Gonzalez, A. H., Han, D., Hilton, M., Huffenberger, K., Hughes, J. P., Macinnis, A., Knowles, K., Koopman, B. J., Lowe, I., Moodley, K., Nati, F., Niemack, M. D., Page, L. A., Partridge, B., Romero, C., Salatino, M., Schillaci, A., Sehgal, N., Sifon, C., Staggs, S., Stanford, S. A., Thornton, R., Vavagiakis, E. M., Wollack, E. J., Xu, Z., and Zhu, N.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, FOS: Physical sciences, Context (language use), clusters: intracluster medium [Galaxies], Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, clusters: general [Galaxies], Cosmic background radiation, Radio continuum: galaxie, 01 natural sciences, Radio continuum: galaxies, galaxies [Submillimeter], Submillimeter: galaxie, Spitzer Space Telescope, Galaxies: clusters: general, Galaxies: clusters: intracluster medium, Submillimeter: galaxies, 0103 physical sciences, Galaxy formation and evolution, Cluster (physics), galaxie [Radio continuum], 010303 astronomy & astrophysics, Galaxy cluster, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Atacama Cosmology Telescope, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Galaxy clusters are an important tool for cosmology, and their detection and characterization are key goals for current and future surveys. Using data from the Wide-field Infrared Survey Explorer (WISE), the Massive and Distant Clusters of WISE Survey (MaDCoWS) located 2,839 significant galaxy overdensities at redshifts $0.7\lesssim z\lesssim 1.5$, which included extensive follow-up imaging from the Spitzer Space Telescope to determine cluster richnesses. Concurrently, the Atacama Cosmology Telescope (ACT) has produced large area mm-wave maps in three frequency bands along with a large catalog of Sunyaev-Zeldovich (SZ) selected clusters, as part of its Data Release 5 (DR5). Using the maps and cluster catalog from DR5, we explore the scaling between SZ mass and cluster richness. We use complementary radio survey data from the Very Large Array, submillimeter data from Herschel, and ACT 224~GHz data to assess the impact of contaminating sources on the SZ signals. We then use a hierarchical Bayesian model to fit the mass-richness scaling relation. We find that MaDCoWS clusters have submillimeter contamination which is consistent with a gray-body spectrum, while the ACT clusters are consistent with no submillimeter emission on average. We find the best fit ACT SZ mass vs. MaDCoWS richness scaling relation has a slope of $\kappa = 1.84^{+0.15}_{-0.14}$, where the slope is defined as $M\propto \lambda_{15}^{\kappa}$ where $\lambda_{15}$ is the richness. Additionally, we find that the approximate level of in-fill of the ACT and MaDCoWS cluster SZ signals to be at the percent level, Comment: 25 pages, 17 Figures; accepted for publication in A&A

Published
2021

48. Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy Clusters

Author

Eli S. Rykoff, Jo Dunkley, E. Bertin, Ofer Lahav, Nick Battaglia, M. Soares-Santos, Hironao Miyatake, Shannon M. Duff, R. D. Wilkinson, Adriaan J. Duivenvoorden, L. N. da Costa, Joel N. Ullom, Robert Morgan, D. L. Burke, Devin Crichton, Kavilan Moodley, Peter Doel, Alexandra Amon, Edward J. Wollack, N. C. Robertson, H. T. Diehl, Joseph E. Golec, Sunayana Bhargava, Samuel Hinton, Emmanuel Schaan, Enrique Gaztanaga, Megan Gralla, David N. Spergel, Johannes Hubmayr, Simon Dicker, David Bacon, S. Allam, Robert A. Gruendl, Simone Ferraro, C. Aros-Bunster, Felipe Menanteau, G. Gutierrez, Kevin M. Huffenberger, Daniel Thomas, Ramon Miquel, Michael D. Niemack, I. Ferrero, Mathew S. Madhavacheril, J. P. Dietrich, Niall MacCrann, Juan Garcia-Bellido, Tesla E. Jeltema, David J. James, Yanxi Zhang, A. K. Romer, Ben Hoyle, Hy Trac, Mark J. Devlin, Patricio A. Gallardo, J. Gschwend, A. A. Plazas, Brian J. Koopman, Rolando Dünner, Zhilei Xu, Simone Aiola, Behzad Ansarinejad, A. Choi, Jeff McMahon, Eduardo Rozo, Gary Bernstein, K. Honscheid, Michel Aguena, Tanay Bhandarkar, Dan Becker, C. Sifon, Neelima Sehgal, Bhuvnesh Jain, Laura Newburgh, Dongwon Han, F. Paz-Chinchón, J. R. Bond, Kyler Kuehn, Peter Melchior, M. Carrasco Kind, Eve M. Vavagiakis, Steve K. Choi, Suzanne T. Staggs, Paul Giles, R. L. C. Ogando, J. C. Hill, Federico Nati, M. E. C. Swanson, E. V. Denison, Kevin T. Crowley, Tony Mroczkowski, W. G. Hartley, Antonella Palmese, Martine Lokken, S. Kent, Alessandro Schillaci, Masamune Oguri, John P. Hughes, M. A. G. Maia, Maria Salatino, S. Amodeo, T. Shin, S. Adhikari, M. Hasselfield, M. Costanzi, S. I. Loubser, J. Van Lanen, B. Partridge, Sigurd Naess, Adam D. Hincks, J. A. Beall, B. Flaugher, S. M. Simon, Jason E. Austermann, S. P. Ho, John Orlowski-Scherer, M. Smith, Daniel Gruen, J. Martin, D. W. Gerdes, J. Annis, Kenda Knowles, David J. Brooks, Erminia Calabrese, Emilie R. Storer, Gene C. Hilton, Leila R. Vale, Salcedo Romero de Ávila, Phumlani Phakathi, Josh Frieman, Yen-Ting Lin, T. M. C. Abbott, Chun-Hao To, E. J. Sanchez, J. Carretero, E. Suchyta, Matt Hilton, Christopher J. Conselice, Tobias A. Marriage, Sebastian Grandis, A. Carnero Rosell, Agnès Ferté, Anton T. Jaelani, Marcos Lima, S. Everett, S. Serrano, Lyman A. Page, J. De Vicente, Atsushi J. Nishizawa, G. Tarle, UAM. Departamento de Física Teórica, Hilton, M, Sifon, C, Naess, S, Madhavacheril, M, Oguri, M, Rozo, E, Rykoff, E, Adhikari, S, Aguena, M, Aiola, S, Allam, S, Amodeo, S, Amon, A, Annis, J, Ansarinejad, B, Abbott, T, Aros-Bunster, C, Austermann, J, Avila, S, Bacon, D, Battaglia, N, Beall, J, Becker, D, Bernstein, G, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, J, Brooks, D, Burke, D, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, S, Choi, A, Conselice, C, Da Costa, L, Costanzi, M, Crichton, D, Crowley, K, Dunner, R, Denison, E, Devlin, M, Dicker, S, Diehl, H, Dietrich, J, Doel, P, Duff, S, Duivenvoorden, A, Dunkley, J, Everett, S, Ferraro, S, Ferte, A, Flaugher, B, Frieman, J, Ferrero, I, Gallardo, P, Garcia-Bellido, J, Gaztanaga, E, Giles, P, Golec, J, Gralla, M, Grandis, S, Gruen, D, Gerdes, D, Gruendl, R, Gschwend, J, Gutierrez, G, Han, D, Hartley, W, Hasselfield, M, Hill, J, Hilton, G, Hincks, A, Hinton, S, Ho, S, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, K, Hughes, J, Jaelani, A, Jain, B, James, D, Jeltema, T, Kent, S, Knowles, K, Koopman, B, Kuehn, K, Lahav, O, Lima, M, Lin, Y, Lokken, M, Loubser, S, Maccrann, N, Maia, M, Marriage, T, Martin, J, Mcmahon, J, Melchior, P, Menanteau, F, Miquel, R, Moodley, K, Morgan, R, Mroczkowski, T, Nati, F, Newburgh, L, Niemack, M, Nishizawa, A, Miyatake, H, Ogando, R, Orlowski-Scherer, J, Page, L, Palmese, A, Partridge, B, Paz-Chinchon, F, Phakathi, P, Plazas, A, Robertson, N, Romer, A, Carnero Rosell, A, Sanchez, E, Schaan, E, Schillaci, A, Sehgal, N, Serrano, S, Shin, T, Simon, S, Smith, M, Salatino, M, Soares-Santos, M, Spergel, D, Staggs, S, Storer, E, Suchyta, E, Swanson, M, Tarle, G, Thomas, D, To, C, Trac, H, Ullom, J, Vale, L, Van Lanen, J, Vavagiakis, E, De Vicente, J, Wilkinson, R, Wollack, E, Xu, Z, Zhan, Y, Hilton, M., Sifón, C., Naess, S., Madhavacheril, M., Oguri, M., Rozo, E., Rykoff, E., Abbott, T. M. C., Adhikari, S., Aguena, M., Aiola, S., Allam, S., Amodeo, S., Amon, A., Annis, J., Ansarinejad, B., Aros-Bunster, C., Austermann, J. E., Avila, S., Bacon, D., Battaglia, N., Beall, J. A., Becker, D. T., Bernstein, G. M., Bertin, E., Bhandarkar, T., Bhargava, S., Bond, J. R., Brooks, D., Burke, D. L., Calabrese, E., Carretero, J., Choi, S. K., Choi, A., Conselice, C., da Costa, L. N., Costanzi, M., Crichton, D., Crowley, K. T., Dünner, R., Denison, E. V., Devlin, M. J., Dicker, S. R., Diehl, H. T., Dietrich, J. P., Doel, P., Duff, S. M., Duivenvoorden, A. J., Dunkley, J., Everett, S., Ferraro, S., Ferrero, I., Ferté, A., Flaugher, B., Frieman, J., Gallardo, P. A., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giles, P., Golec, J. E., Gralla, M. B., Grandis, S., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Han, D., Hartley, W. G., Hasselfield, M., Hill, J. C., Hilton, G. C., Hincks, A. D., Hinton, S. R., S-P. P., Ho, Honscheid, K., Hoyle, B., Hubmayr, J., Huffenberger, K. M., Hughes, J. P., Jaelani, A. T., Jain, B., James, D. J., Jeltema, T., Kent, S., Carrasco Kind, M., Knowles, K., Koopman, B. J., Kuehn, K., Lahav, O., Lima, M., Lin, Y-T., Lokken, M., Loubser, S. I., Maccrann, N., Maia, M. A. G., Marriage, T. A., Martin, J., Mcmahon, J., Melchior, P., Menanteau, F., Miquel, R., Miyatake, H., Moodley, K., Morgan, R., Mroczkowski, T., Nati, F., Newburgh, L. B., Niemack, M. D., Nishizawa, A. J., Ogando, R. L. C., Orlowski-Scherer, J., Page, L. A., Palmese, A., Partridge, B., Paz-Chinchón, F., Phakathi, P., Plazas, A. A., Robertson, N. C., Romer, A. K., Carnero Rosell, A., Salatino, M., Sanchez, E., Schaan, E., Schillaci, A., Sehgal, N., Serrano, S., Shin, T., Simon, S. M., Smith, M., Soares-Santos, M., Spergel, D. N., Staggs, S. T., Storer, E. R., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Trac, H., Ullom, J. N., Vale, L. R., Van Lanen, J., Vavagiakis, E. M., De Vicente, J., Wilkinson, R. D., Wollack, E. J., Xu, Z., and Zhang, Y.

Subjects
Galaxy clusters, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmology, Large-scale structure of the universe, Astrophysics - Cosmology and Nongalactic Astrophysics, Intracluster medium, 0103 physical sciences, Cluster (physics), Sunyaev-Zeldovich Effect, 010303 astronomy & astrophysics, Cosmology, Galaxy clusters, Galaxy cluster, Astrophysics::Galaxy Astrophysics, AGLOMERADOS (GALÁXIA), Physics, 010308 nuclear & particles physics, Star formation, Física, Astronomy and Astrophysics, XMM-newton Telescope, Galaxies, Galaxy, Redshift, Space and Planetary Science, Atacama Cosmology Telescope
Abstract

Hilton, M., et al., We present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observations obtained from 2008 to 2018 and confirmed using deep, wide-area optical surveys. The clusters span the redshift range 0.04 < z < 1.91 (median z = 0.52). The catalog contains 222 z > 1 clusters, and a total of 868 systems are new discoveries. Assuming an SZ signal versus mass-scaling relation calibrated from X-ray observations, the sample has a 90% completeness mass limit of M > 3.8 × 10 M, evaluated at z = 0.5, for clusters detected at signal-to-noise ratio >5 in maps filtered at an angular scale of 2 4. The survey has a large overlap with deep optical weak-lensing surveys that are being used to calibrate the SZ signal mass-scaling relation, such as the Dark Energy Survey (4566 deg), the Hyper Suprime-Cam Subaru Strategic Program (469 deg), and the Kilo Degree Survey (825 deg). We highlight some noteworthy objects in the sample, including potentially projected systems, clusters with strong lensing features, clusters with active central galaxies or star formation, and systems of multiple clusters that may be physically associated. The cluster catalog will be a useful resource for future cosmological analyses and studying the evolution of the intracluster medium and galaxies in massive clusters over the past 10 Gyr., The DES Data Management System is supported by the NSF under Grant Nos. AST-1138766 and AST-1536171. The DES participants from Spanish institutions are partially supported by MICINN under grants ESP2017-89838, PGC2018-094773, PGC2018-102021, SEV-2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. Research leading to these results has received funding from the European Research Council under the European Unionʼs Seventh Framework Program (FP7/2007-2013) including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciência e Tecnologia (INCT) do e-Universo (CNPq grant 465376/2014-2).

Published
2021

49. Optical design of the atacama cosmology telescope and the millimeter bolometric array camera.

Author

Fowler JW, Niemack MD, Dicker SR, Aboobaker AM, Ade PA, Battistelli ES, Devlin MJ, Fisher RP, Halpern M, Hargrave PC, Hincks AD, Kaul M, Klein J, Lau JM, Limon M, Marriage TA, Mauskopf PD, Page L, Staggs ST, Swetz DS, Switzer ER, Thornton RJ, and Tucker CE

Abstract

The Atacama Cosmology Telescope is a 6 m telescope designed to map the cosmic microwave background simultaneously at 145, 215, and 280 GHz with arcminute resolution. Each frequency will have a 32 by 32 element focal plane array of transition edge sensor bolometers. The telescope and the cold reimaging optics are optimized for millimeter-wave observations with these sensitive detectors. The design of each is described.

Published
2007
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