Author: "Koopman BJ" / Publication Type: Electronic Resources - Searchworks@Jio Institute Digital Library Search Results

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29 results on '"Koopman BJ"'

1. The Simons Observatory: Cryogenic half wave plate rotation mechanism for the small aperture telescopes

Author: Yamada, K, Yamada, K, Bixler, B, Sakurai, Y, Ashton, PC, Sugiyama, J, Arnold, K, Begin, J, Corbett, L, Day-Weiss, S, Galitzki, N, Hill, CA, Johnson, BR, Jost, B, Kusaka, A, Koopman, BJ, Lashner, J, Lee, AT, Mangu, A, Nishino, H, Page, LA, Randall, MJ, Sasaki, D, Song, X, Spisak, J, Tsan, T, Wang, Y, Williams, PA, Yamada, K, Yamada, K, Bixler, B, Sakurai, Y, Ashton, PC, Sugiyama, J, Arnold, K, Begin, J, Corbett, L, Day-Weiss, S, Galitzki, N, Hill, CA, Johnson, BR, Jost, B, Kusaka, A, Koopman, BJ, Lashner, J, Lee, AT, Mangu, A, Nishino, H, Page, LA, Randall, MJ, Sasaki, D, Song, X, Spisak, J, Tsan, T, Wang, Y, and Williams, PA
Published: 2024

2. The atacama cosmology telescope: A catalog of >4000 Sunyaev–Zel’dovich galaxy clusters

Author: Hilton, M, Hilton, M, Sifón, 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, TMC, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Da Costa, LN, Costanzi, M, Crichton, D, Crowley, KT, Dünner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferté, A, Flaugher, B, Frieman, J, Ferrero, I, Gallardo, PA, García-Bellido, J, Gaztanaga, E, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gerdes, DW, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, SPP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, YT, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, Melchior, P, Hilton, M, Hilton, M, Sifón, 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, TMC, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Da Costa, LN, Costanzi, M, Crichton, D, Crowley, KT, Dünner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferté, A, Flaugher, B, Frieman, J, Ferrero, I, Gallardo, PA, García-Bellido, J, Gaztanaga, E, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gerdes, DW, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, SPP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, YT, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, and Melchior, P
Abstract: 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 deg2 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 M500c > 3.8 × 1014 Me, 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 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2). 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.
Published: 2021

3. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

Author: Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z
Abstract: We present a detection of the pairwise kinematic Sunyaev-Zeldovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and Planck CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained using three ACT CMB maps: co-added 150 and 98 GHz maps, combining observations from 2008-2018 (ACT DR5), which overlap with SDSS DR15 over 3,700 sq. deg., and a component-separated map using night-time only observations from 2014-2015 (ACT DR4), overlapping with SDSS DR15 over 2,089 sq. deg. Comparisons of the results from these three maps provide consistency checks in relation to potential frequency-dependent foreground contamination. A total of 343,647 galaxies are used as tracers to identify and locate galaxy groups and clusters from which the kSZ signal is extracted using aperture photometry. We consider the impact of various aperture photometry assumptions and covariance estimation methods on the signal extraction. Theoretical predictions of the pairwise velocities are used to obtain best-fit, mass-averaged, optical depth estimates for each of five luminosity-selected tracer samples. A comparison of the kSZ-derived optical depth measurements obtained here to those derived from the thermal SZ effect for the same sample is presented in a companion paper.
Published: 2021

4. The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

Author: Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, Xu, Z, Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, and Xu, Z
Abstract: We present arcminute-resolution intensity and polarization maps of the Galactic center made with the Atacama Cosmology Telescope. The maps cover a 32 deg2 field at 98, 150, and 224 GHz with |l| ≤ 4 , |b| ≤ 2 . We combine these data with Planck observations at similar frequencies to create coadded maps with increased sensitivity at large angular scales. With the coadded maps, we are able to resolve many known features of the Central Molecular Zone (CMZ) in both total intensity and polarization. We map the orientation of the plane-of-sky component of the Galactic magnetic field inferred from the polarization angle in the CMZ, finding significant changes in morphology in the three frequency bands as the underlying dominant emission mechanism changes from synchrotron to dust emission. Selected Galactic center sources, including Sgr A∗, the Brick molecular cloud (G0.253+0.016), the Mouse pulsar wind nebula (G359.23-0.82), and the Tornado supernova remnant candidate (G357.7-0.1), are examined in detail. These data illustrate the potential for leveraging ground-based cosmic microwave background polarization experiments for Galactic science.
Published: 2021

5. The Atacama Cosmology Telescope: A Search for Planet 9

Author: Naess, S, Naess, S, Aiola, S, Battaglia, N, Bond, RJ, Calabrese, E, Choi, SK, Cothard, NF, Halpern, M, Hill, JC, Koopman, BJ, Devlin, M, McMahon, J, Dicker, S, Duivenvoorden, AJ, Dunkley, J, Fanfani, V, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Hasselfield, M, Hincks, AD, Huffenberger, K, Kosowsky, AB, Louis, T, Macinnis, A, Madhavacheril, MS, Nati, F, Niemack, MD, Page, L, Salatino, M, Schaan, E, Orlowski-Scherer, J, Schillaci, A, Schmitt, B, Sehgal, N, Sifón, C, Staggs, S, Engelen, AV, Wollack, EJ, Naess, S, Naess, S, Aiola, S, Battaglia, N, Bond, RJ, Calabrese, E, Choi, SK, Cothard, NF, Halpern, M, Hill, JC, Koopman, BJ, Devlin, M, McMahon, J, Dicker, S, Duivenvoorden, AJ, Dunkley, J, Fanfani, V, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Hasselfield, M, Hincks, AD, Huffenberger, K, Kosowsky, AB, Louis, T, Macinnis, A, Madhavacheril, MS, Nati, F, Niemack, MD, Page, L, Salatino, M, Schaan, E, Orlowski-Scherer, J, Schillaci, A, Schmitt, B, Sehgal, N, Sifón, C, Staggs, S, Engelen, AV, and Wollack, EJ
Abstract: We use Atacama Cosmology Telescope (ACT) observations at 98 GHz (2015–2019), 150 GHz (2013–2019), and 229 GHz (2017–2019) to perform a blind shift-and-stack search for Planet 9. The search explores distances from 300 au to 2000 au and velocities up to 6.′3 per year, depending on the distance (r). For a 5 Earth-mass Planet 9 the detection limit varies from 325 au to 625 au, depending on the sky location. For a 10 Earth-mass planet the corresponding range is 425 au to 775 au. The predicted aphelion and most likely location of the planet corresponds to the shallower end of these ranges. The search covers the whole 18,000 square degrees of the ACT survey. No significant detections are found, which is used to place limits on the millimeter-wave flux density of Planet 9 over much of its orbit. Overall we eliminate roughly 17% and 9% of the parameter space for a 5 and 10 Earth-mass Planet 9, respectively. These bounds approach those of a recent INPOP19a ephemeris-based analysis, but do not exceed it. We also provide a list of the 10 strongest candidates from the search for possible follow-up. More generally, we exclude (at 95% confidence) the presence of an unknown solar system object within our survey area brighter than 4–12 mJy (depending on position) at 150 GHz with current distance 300 au < r < 600 au and heliocentric angular velocity , corresponding to low-to-moderate eccentricities. These limits worsen gradually beyond 600 au, reaching 5–15 mJy by 1500 au.
Published: 2021

6. The mass and galaxy distribution around SZ-selected clusters

Author: Shin, T, Shin, T, Jain, B, Adhikari, S, Baxter, EJ, Chang, C, Pandey, S, Salcedo, A, Weinberg, DH, Amsellem, A, Battaglia, N, Belyakov, M, Dacunha, T, Goldstein, S, Kravtsov, AV, Varga, TN, Abbott, TMC, Aguena, M, Alarcon, A, Allam, S, Amon, A, Andrade-Oliveira, F, Annis, J, Bacon, D, Bechtol, K, Becker, MR, Bernstein, GM, Bertin, E, Bocquet, S, Bond, JR, Brooks, D, Buckley-Geer, E, Burke, DL, Campos, A, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Chen, R, Choi, A, Costanzi, M, da Costa, LN, DeRose, J, Desai, S, de Vicente, J, Devlin, MJ, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Doux, C, Drlica-Wagner, A, Eckert, K, Elvin-Poole, J, Everett, S, Ferraro, S, Ferrero, I, Ferté, A, Flaugher, B, Frieman, J, Gallardo, PA, Gatti, M, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gutierrez, G, Harrison, I, Hartley, WG, Hill, JC, Hilton, M, Hinton, SR, Hollowood, DL, Hughes, JP, James, DJ, Jarvis, M, Jeltema, T, Koopman, BJ, Krause, E, Kuehn, K, Kuropatkin, N, Lahav, O, Lima, M, Lokken, M, MacCrann, N, Madhavacheril, MS, Maia, MAG, McCullough, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Mohr, JJ, Moodley, K, Morgan, R, Myles, J, Nati, F, Navarro-Alsina, A, Niemack, MD, Ogando, RLC, Page, LA, Palmese, A, Shin, T, Shin, T, Jain, B, Adhikari, S, Baxter, EJ, Chang, C, Pandey, S, Salcedo, A, Weinberg, DH, Amsellem, A, Battaglia, N, Belyakov, M, Dacunha, T, Goldstein, S, Kravtsov, AV, Varga, TN, Abbott, TMC, Aguena, M, Alarcon, A, Allam, S, Amon, A, Andrade-Oliveira, F, Annis, J, Bacon, D, Bechtol, K, Becker, MR, Bernstein, GM, Bertin, E, Bocquet, S, Bond, JR, Brooks, D, Buckley-Geer, E, Burke, DL, Campos, A, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Chen, R, Choi, A, Costanzi, M, da Costa, LN, DeRose, J, Desai, S, de Vicente, J, Devlin, MJ, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Doux, C, Drlica-Wagner, A, Eckert, K, Elvin-Poole, J, Everett, S, Ferraro, S, Ferrero, I, Ferté, A, Flaugher, B, Frieman, J, Gallardo, PA, Gatti, M, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gutierrez, G, Harrison, I, Hartley, WG, Hill, JC, Hilton, M, Hinton, SR, Hollowood, DL, Hughes, JP, James, DJ, Jarvis, M, Jeltema, T, Koopman, BJ, Krause, E, Kuehn, K, Kuropatkin, N, Lahav, O, Lima, M, Lokken, M, MacCrann, N, Madhavacheril, MS, Maia, MAG, McCullough, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Mohr, JJ, Moodley, K, Morgan, R, Myles, J, Nati, F, Navarro-Alsina, A, Niemack, MD, Ogando, RLC, Page, LA, and Palmese, A
Abstract: We present measurements of the radial profiles of the mass and galaxy number density around Sunyaev–Zel’dovich (SZ)-selected clusters using both weak lensing and galaxy counts. The clusters are selected from the Atacama Cosmology Telescope Data Release 5 and the galaxies from the Dark Energy Survey Year 3 data set. With signal-to-noise ratio of 62 (45) for galaxy (weak lensing) profiles over scales of about 0.2–20 h-1 Mpc, these are the highest precision measurements for SZ-selected clusters to date. Because SZ selection closely approximates mass selection, these measurements enable several tests of theoretical models of the mass and light distribution around clusters. Our main findings are: (1) The splashback feature is detected at a consistent location in both the mass and galaxy profiles and its location is consistent with predictions of cold dark matter N-body simulations. (2) The full mass profile is also consistent with the simulations. (3) The shapes of the galaxy and lensing profiles are remarkably similar for our sample over the entire range of scales, from well inside the cluster halo to the quasilinear regime. We measure the dependence of the profile shapes on the galaxy sample, redshift, and cluster mass. We extend the Diemer & Kravtsov model for the cluster profiles to the linear regime using perturbation theory and show that it provides a good match to the measured profiles. We also compare the measured profiles to predictions of the standard halo model and simulations that include hydrodynamics. Applications of these results to cluster mass estimation, cosmology, and astrophysics are discussed.
Published: 2021

7. The atacama cosmology telescope: Summary of dr4 and dr5 data products and data access

Author: Mallaby-Kay, M, Mallaby-Kay, M, Atkins, Z, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Bond, JR, Calabrese, E, Chesmore, GE, Choi, SK, Crowley, KT, Darwish, O, Denison, EV, Devlin, MJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Ferraro, S, Fichman, K, Gallardo, PA, Golec, JE, Guan, Y, Han, D, Hasselfield, M, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Louis, T, MacInnis, A, Madhavacheril, MS, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, LB, Nibarger, JP, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Schillaci, A, Sehgal, N, Sherwin, BD, Sifón, C, Simon, S, Staggs, ST, Storer, ER, Ullom, JN, Van Engelen, A, Van Lanen, J, Vale, LR, Wollack, EJ, Xu, Z, Mallaby-Kay, M, Mallaby-Kay, M, Atkins, Z, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Bond, JR, Calabrese, E, Chesmore, GE, Choi, SK, Crowley, KT, Darwish, O, Denison, EV, Devlin, MJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Ferraro, S, Fichman, K, Gallardo, PA, Golec, JE, Guan, Y, Han, D, Hasselfield, M, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Louis, T, MacInnis, A, Madhavacheril, MS, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, LB, Nibarger, JP, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Schillaci, A, Sehgal, N, Sherwin, BD, Sifón, C, Simon, S, Staggs, ST, Storer, ER, Ullom, JN, Van Engelen, A, Van Lanen, J, Vale, LR, Wollack, EJ, and Xu, Z
Abstract: Two recent large data releases for the Atacama Cosmology Telescope (ACT), called DR4 and DR5, are available for public access. These data include temperature and polarization maps that cover nearly half the sky at arcminute resolution in three frequency bands; lensing maps and component-separated maps covering ~2100 deg2 of sky; derived power spectra and cosmological likelihoods; a catalog of over 4000 galaxy clusters; and supporting ancillary products including beam functions and masks. The data and products are described in a suite of ACT papers; here we provide a summary. In order to facilitate ease of access to these data, we present a set of Jupyter IPython notebooks developed to introduce users to DR4, DR5, and the tools needed to analyze these data. The data products (excluding simulations) and the set of notebooks are publicly available on the NASA Legacy Archive for Microwave Background Data Analysis; simulation products are available on the National Energy Research Scientific Computing Center.
Published: 2021

8. The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

Author: Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z
Abstract: We present measurements of the average thermal Sunyaev Zel’dovich (tSZ) effect from optically selected galaxy groups and clusters at high signal-to-noise (up to ) and estimate their baryon content within a radius aperture. Sources from the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey DR15 catalog overlap with 3,700 sq deg of sky observed by the Atacama Cosmology Telescope (ACT) from 2008 to 2018 at 150 and 98 GHz (ACT DR5), and 2,089 sq deg of internal linear combination component-separated maps combining ACT and Planck data (ACT DR4). The corresponding optical depths , which depend on the baryon content of the halos, are estimated using results from cosmological hydrodynamic simulations assuming an active galactic nuclei feedback radiative cooling model. We estimate the mean mass of the halos in multiple luminosity bins, and compare the tSZ-based estimates to theoretical predictions of the baryon content for a Navarro-Frenk-White profile. We do the same for estimates extracted from fits to pairwise baryon momentum measurements of the kinematic Sunyaev-Zel’dovich effect (kSZ) for the same dataset obtained in a companion paper. We find that the estimates from the tSZ measurements in this work and the kSZ measurements in the companion paper agree within for two out of the three disjoint luminosity bins studied, while they differ by in the highest luminosity bin. The optical depth estimates account for one-third to all of the theoretically predicted baryon content in the halos across luminosity bins. Potential systematic uncertainties are discussed. The tSZ and kSZ measurements provide a step toward empirical Compton- relationships to provide new tests of cluster formation and evolution models.
Published: 2021

9. The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev-Zel'dovich Galaxy Clusters

Author: Hilton, M, Sifon, C, Naess, S, Madhavacheril, M, Oguri, M, Rozo, E, Rykoff, E, Abbott, TMC, Adhikari, S, Aguena, M, Aiola, S, Allam, S, Amodeo, S, Amon, A, Annis, J, Ansarinejad, B, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Costa, LND, Costanzi, M, Crichton, D, Crowley, KT, Dunner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferrero, I, Ferte, A, Flaugher, B, Frieman, J, Gallardo, PA, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, S-PP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, Y-T, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Miyatake, H, Moodley, K, Morgan, R, Mroczkowski, T, Nati, F, Newburgh, LB, Niemack, MD, Nishizawa, AJ, Ogando, RLC, Orlowski-Scherer, J, Page, LA, Palmese, A, Partridge, B, Paz-Chinchon, F, Phakathi, P, Plazas, AA, Robertson, NC, Romer, AK, Rosell, AC, Salatino, M, Sanchez, E, Schaan, E, Schillaci, A, Sehgal, N, Serrano, S, Shin, T, Simon, SM, Smith, M, Soares-Santos, M, Spergel, DN, Staggs, ST, Storer, ER, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, To, C, Trac, H, Ullom, JN, Vale, LR, Lanen, JV, Vavagiakis, EM, Vicente, JD, Wilkinson, RD, Wollack, EJ, Xu, Z, Zhang, Y, Hilton, M, Sifon, C, Naess, S, Madhavacheril, M, Oguri, M, Rozo, E, Rykoff, E, Abbott, TMC, Adhikari, S, Aguena, M, Aiola, S, Allam, S, Amodeo, S, Amon, A, Annis, J, Ansarinejad, B, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Costa, LND, Costanzi, M, Crichton, D, Crowley, KT, Dunner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferrero, I, Ferte, A, Flaugher, B, Frieman, J, Gallardo, PA, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, S-PP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, Y-T, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Miyatake, H, Moodley, K, Morgan, R, Mroczkowski, T, Nati, F, Newburgh, LB, Niemack, MD, Nishizawa, AJ, Ogando, RLC, Orlowski-Scherer, J, Page, LA, Palmese, A, Partridge, B, Paz-Chinchon, F, Phakathi, P, Plazas, AA, Robertson, NC, Romer, AK, Rosell, AC, Salatino, M, Sanchez, E, Schaan, E, Schillaci, A, Sehgal, N, Serrano, S, Shin, T, Simon, SM, Smith, M, Soares-Santos, M, Spergel, DN, Staggs, ST, Storer, ER, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, To, C, Trac, H, Ullom, JN, Vale, LR, Lanen, JV, Vavagiakis, EM, Vicente, JD, Wilkinson, RD, Wollack, EJ, Xu, Z, and Zhang, Y
Abstract: 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 deg2 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 500c > 3.8 × 1014 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 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2). 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.
Published: 2021

10. The mass and galaxy distribution around SZ-selected clusters

Author: Shin, T, Shin, T, Jain, B, Adhikari, S, Baxter, EJ, Chang, C, Pandey, S, Salcedo, A, Weinberg, DH, Amsellem, A, Battaglia, N, Belyakov, M, Dacunha, T, Goldstein, S, Kravtsov, AV, Varga, TN, Abbott, TMC, Aguena, M, Alarcon, A, Allam, S, Amon, A, Andrade-Oliveira, F, Annis, J, Bacon, D, Bechtol, K, Becker, MR, Bernstein, GM, Bertin, E, Bocquet, S, Bond, JR, Brooks, D, Buckley-Geer, E, Burke, DL, Campos, A, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Chen, R, Choi, A, Costanzi, M, da Costa, LN, DeRose, J, Desai, S, de Vicente, J, Devlin, MJ, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Doux, C, Drlica-Wagner, A, Eckert, K, Elvin-Poole, J, Everett, S, Ferraro, S, Ferrero, I, Ferté, A, Flaugher, B, Frieman, J, Gallardo, PA, Gatti, M, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gutierrez, G, Harrison, I, Hartley, WG, Hill, JC, Hilton, M, Hinton, SR, Hollowood, DL, Hughes, JP, James, DJ, Jarvis, M, Jeltema, T, Koopman, BJ, Krause, E, Kuehn, K, Kuropatkin, N, Lahav, O, Lima, M, Lokken, M, MacCrann, N, Madhavacheril, MS, Maia, MAG, McCullough, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Mohr, JJ, Moodley, K, Morgan, R, Myles, J, Nati, F, Navarro-Alsina, A, Niemack, MD, Ogando, RLC, Page, LA, Palmese, A, Shin, T, Shin, T, Jain, B, Adhikari, S, Baxter, EJ, Chang, C, Pandey, S, Salcedo, A, Weinberg, DH, Amsellem, A, Battaglia, N, Belyakov, M, Dacunha, T, Goldstein, S, Kravtsov, AV, Varga, TN, Abbott, TMC, Aguena, M, Alarcon, A, Allam, S, Amon, A, Andrade-Oliveira, F, Annis, J, Bacon, D, Bechtol, K, Becker, MR, Bernstein, GM, Bertin, E, Bocquet, S, Bond, JR, Brooks, D, Buckley-Geer, E, Burke, DL, Campos, A, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Chen, R, Choi, A, Costanzi, M, da Costa, LN, DeRose, J, Desai, S, de Vicente, J, Devlin, MJ, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Doux, C, Drlica-Wagner, A, Eckert, K, Elvin-Poole, J, Everett, S, Ferraro, S, Ferrero, I, Ferté, A, Flaugher, B, Frieman, J, Gallardo, PA, Gatti, M, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gutierrez, G, Harrison, I, Hartley, WG, Hill, JC, Hilton, M, Hinton, SR, Hollowood, DL, Hughes, JP, James, DJ, Jarvis, M, Jeltema, T, Koopman, BJ, Krause, E, Kuehn, K, Kuropatkin, N, Lahav, O, Lima, M, Lokken, M, MacCrann, N, Madhavacheril, MS, Maia, MAG, McCullough, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Mohr, JJ, Moodley, K, Morgan, R, Myles, J, Nati, F, Navarro-Alsina, A, Niemack, MD, Ogando, RLC, Page, LA, and Palmese, A
Abstract: We present measurements of the radial profiles of the mass and galaxy number density around Sunyaev–Zel’dovich (SZ)-selected clusters using both weak lensing and galaxy counts. The clusters are selected from the Atacama Cosmology Telescope Data Release 5 and the galaxies from the Dark Energy Survey Year 3 data set. With signal-to-noise ratio of 62 (45) for galaxy (weak lensing) profiles over scales of about 0.2–20 h-1 Mpc, these are the highest precision measurements for SZ-selected clusters to date. Because SZ selection closely approximates mass selection, these measurements enable several tests of theoretical models of the mass and light distribution around clusters. Our main findings are: (1) The splashback feature is detected at a consistent location in both the mass and galaxy profiles and its location is consistent with predictions of cold dark matter N-body simulations. (2) The full mass profile is also consistent with the simulations. (3) The shapes of the galaxy and lensing profiles are remarkably similar for our sample over the entire range of scales, from well inside the cluster halo to the quasilinear regime. We measure the dependence of the profile shapes on the galaxy sample, redshift, and cluster mass. We extend the Diemer & Kravtsov model for the cluster profiles to the linear regime using perturbation theory and show that it provides a good match to the measured profiles. We also compare the measured profiles to predictions of the standard halo model and simulations that include hydrodynamics. Applications of these results to cluster mass estimation, cosmology, and astrophysics are discussed.
Published: 2021

11. The atacama cosmology telescope: A catalog of >4000 Sunyaev–Zel’dovich galaxy clusters

Author: Hilton, M, Hilton, M, Sifón, 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, TMC, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Da Costa, LN, Costanzi, M, Crichton, D, Crowley, KT, Dünner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferté, A, Flaugher, B, Frieman, J, Ferrero, I, Gallardo, PA, García-Bellido, J, Gaztanaga, E, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gerdes, DW, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, SPP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, YT, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, Melchior, P, Hilton, M, Hilton, M, Sifón, 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, TMC, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Da Costa, LN, Costanzi, M, Crichton, D, Crowley, KT, Dünner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferté, A, Flaugher, B, Frieman, J, Ferrero, I, Gallardo, PA, García-Bellido, J, Gaztanaga, E, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gerdes, DW, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, SPP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, YT, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, and Melchior, P
Abstract: 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 deg2 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 M500c > 3.8 × 1014 Me, 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 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2). 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.
Published: 2021

12. The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

Author: Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, Xu, Z, Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, and Xu, Z
Abstract: We present arcminute-resolution intensity and polarization maps of the Galactic center made with the Atacama Cosmology Telescope. The maps cover a 32 deg2 field at 98, 150, and 224 GHz with |l| ≤ 4 , |b| ≤ 2 . We combine these data with Planck observations at similar frequencies to create coadded maps with increased sensitivity at large angular scales. With the coadded maps, we are able to resolve many known features of the Central Molecular Zone (CMZ) in both total intensity and polarization. We map the orientation of the plane-of-sky component of the Galactic magnetic field inferred from the polarization angle in the CMZ, finding significant changes in morphology in the three frequency bands as the underlying dominant emission mechanism changes from synchrotron to dust emission. Selected Galactic center sources, including Sgr A∗, the Brick molecular cloud (G0.253+0.016), the Mouse pulsar wind nebula (G359.23-0.82), and the Tornado supernova remnant candidate (G357.7-0.1), are examined in detail. These data illustrate the potential for leveraging ground-based cosmic microwave background polarization experiments for Galactic science.
Published: 2021

13. The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

Author: Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z
Abstract: We present measurements of the average thermal Sunyaev Zel’dovich (tSZ) effect from optically selected galaxy groups and clusters at high signal-to-noise (up to ) and estimate their baryon content within a radius aperture. Sources from the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey DR15 catalog overlap with 3,700 sq deg of sky observed by the Atacama Cosmology Telescope (ACT) from 2008 to 2018 at 150 and 98 GHz (ACT DR5), and 2,089 sq deg of internal linear combination component-separated maps combining ACT and Planck data (ACT DR4). The corresponding optical depths , which depend on the baryon content of the halos, are estimated using results from cosmological hydrodynamic simulations assuming an active galactic nuclei feedback radiative cooling model. We estimate the mean mass of the halos in multiple luminosity bins, and compare the tSZ-based estimates to theoretical predictions of the baryon content for a Navarro-Frenk-White profile. We do the same for estimates extracted from fits to pairwise baryon momentum measurements of the kinematic Sunyaev-Zel’dovich effect (kSZ) for the same dataset obtained in a companion paper. We find that the estimates from the tSZ measurements in this work and the kSZ measurements in the companion paper agree within for two out of the three disjoint luminosity bins studied, while they differ by in the highest luminosity bin. The optical depth estimates account for one-third to all of the theoretically predicted baryon content in the halos across luminosity bins. Potential systematic uncertainties are discussed. The tSZ and kSZ measurements provide a step toward empirical Compton- relationships to provide new tests of cluster formation and evolution models.
Published: 2021

14. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

Author: Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z
Abstract: We present a detection of the pairwise kinematic Sunyaev-Zeldovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and Planck CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained using three ACT CMB maps: co-added 150 and 98 GHz maps, combining observations from 2008-2018 (ACT DR5), which overlap with SDSS DR15 over 3,700 sq. deg., and a component-separated map using night-time only observations from 2014-2015 (ACT DR4), overlapping with SDSS DR15 over 2,089 sq. deg. Comparisons of the results from these three maps provide consistency checks in relation to potential frequency-dependent foreground contamination. A total of 343,647 galaxies are used as tracers to identify and locate galaxy groups and clusters from which the kSZ signal is extracted using aperture photometry. We consider the impact of various aperture photometry assumptions and covariance estimation methods on the signal extraction. Theoretical predictions of the pairwise velocities are used to obtain best-fit, mass-averaged, optical depth estimates for each of five luminosity-selected tracer samples. A comparison of the kSZ-derived optical depth measurements obtained here to those derived from the thermal SZ effect for the same sample is presented in a companion paper.
Published: 2021

15. The atacama cosmology telescope: Summary of dr4 and dr5 data products and data access

Author: Mallaby-Kay, M, Mallaby-Kay, M, Atkins, Z, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Bond, JR, Calabrese, E, Chesmore, GE, Choi, SK, Crowley, KT, Darwish, O, Denison, EV, Devlin, MJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Ferraro, S, Fichman, K, Gallardo, PA, Golec, JE, Guan, Y, Han, D, Hasselfield, M, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Louis, T, MacInnis, A, Madhavacheril, MS, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, LB, Nibarger, JP, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Schillaci, A, Sehgal, N, Sherwin, BD, Sifón, C, Simon, S, Staggs, ST, Storer, ER, Ullom, JN, Van Engelen, A, Van Lanen, J, Vale, LR, Wollack, EJ, Xu, Z, Mallaby-Kay, M, Mallaby-Kay, M, Atkins, Z, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Bond, JR, Calabrese, E, Chesmore, GE, Choi, SK, Crowley, KT, Darwish, O, Denison, EV, Devlin, MJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Ferraro, S, Fichman, K, Gallardo, PA, Golec, JE, Guan, Y, Han, D, Hasselfield, M, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Louis, T, MacInnis, A, Madhavacheril, MS, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, LB, Nibarger, JP, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Schillaci, A, Sehgal, N, Sherwin, BD, Sifón, C, Simon, S, Staggs, ST, Storer, ER, Ullom, JN, Van Engelen, A, Van Lanen, J, Vale, LR, Wollack, EJ, and Xu, Z
Abstract: Two recent large data releases for the Atacama Cosmology Telescope (ACT), called DR4 and DR5, are available for public access. These data include temperature and polarization maps that cover nearly half the sky at arcminute resolution in three frequency bands; lensing maps and component-separated maps covering ~2100 deg2 of sky; derived power spectra and cosmological likelihoods; a catalog of over 4000 galaxy clusters; and supporting ancillary products including beam functions and masks. The data and products are described in a suite of ACT papers; here we provide a summary. In order to facilitate ease of access to these data, we present a set of Jupyter IPython notebooks developed to introduce users to DR4, DR5, and the tools needed to analyze these data. The data products (excluding simulations) and the set of notebooks are publicly available on the NASA Legacy Archive for Microwave Background Data Analysis; simulation products are available on the National Energy Research Scientific Computing Center.
Published: 2021

16. The Atacama Cosmology Telescope: A Search for Planet 9

Author: Naess, S, Naess, S, Aiola, S, Battaglia, N, Bond, RJ, Calabrese, E, Choi, SK, Cothard, NF, Halpern, M, Hill, JC, Koopman, BJ, Devlin, M, McMahon, J, Dicker, S, Duivenvoorden, AJ, Dunkley, J, Fanfani, V, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Hasselfield, M, Hincks, AD, Huffenberger, K, Kosowsky, AB, Louis, T, Macinnis, A, Madhavacheril, MS, Nati, F, Niemack, MD, Page, L, Salatino, M, Schaan, E, Orlowski-Scherer, J, Schillaci, A, Schmitt, B, Sehgal, N, Sifón, C, Staggs, S, Engelen, AV, Wollack, EJ, Naess, S, Naess, S, Aiola, S, Battaglia, N, Bond, RJ, Calabrese, E, Choi, SK, Cothard, NF, Halpern, M, Hill, JC, Koopman, BJ, Devlin, M, McMahon, J, Dicker, S, Duivenvoorden, AJ, Dunkley, J, Fanfani, V, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Hasselfield, M, Hincks, AD, Huffenberger, K, Kosowsky, AB, Louis, T, Macinnis, A, Madhavacheril, MS, Nati, F, Niemack, MD, Page, L, Salatino, M, Schaan, E, Orlowski-Scherer, J, Schillaci, A, Schmitt, B, Sehgal, N, Sifón, C, Staggs, S, Engelen, AV, and Wollack, EJ
Abstract: We use Atacama Cosmology Telescope (ACT) observations at 98 GHz (2015–2019), 150 GHz (2013–2019), and 229 GHz (2017–2019) to perform a blind shift-and-stack search for Planet 9. The search explores distances from 300 au to 2000 au and velocities up to 6.′3 per year, depending on the distance (r). For a 5 Earth-mass Planet 9 the detection limit varies from 325 au to 625 au, depending on the sky location. For a 10 Earth-mass planet the corresponding range is 425 au to 775 au. The predicted aphelion and most likely location of the planet corresponds to the shallower end of these ranges. The search covers the whole 18,000 square degrees of the ACT survey. No significant detections are found, which is used to place limits on the millimeter-wave flux density of Planet 9 over much of its orbit. Overall we eliminate roughly 17% and 9% of the parameter space for a 5 and 10 Earth-mass Planet 9, respectively. These bounds approach those of a recent INPOP19a ephemeris-based analysis, but do not exceed it. We also provide a list of the 10 strongest candidates from the search for possible follow-up. More generally, we exclude (at 95% confidence) the presence of an unknown solar system object within our survey area brighter than 4–12 mJy (depending on position) at 150 GHz with current distance 300 au < r < 600 au and heliocentric angular velocity , corresponding to low-to-moderate eccentricities. These limits worsen gradually beyond 600 au, reaching 5–15 mJy by 1500 au.
Published: 2021

17. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

Author: Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z
Abstract: Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in ground-based CMB experiments. Using this method, we combine multifrequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first wide-area (≈2100 sq. deg.), arcminute-resolution component-separated maps of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure profiles of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper are available on LAMBDA.
Published: 2020

18. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Author: Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z
Abstract: We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of zñ = 1.08. There are currently no representative optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of 4.2s. We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro–Frenk–White (NFW) density profiles, we infer a mean mass of M500cñ = (1.7 + 0.4) ´ 1014 M*. We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable universe, beyond the capabilities of optical weak lensing measurements.
Published: 2020

19. The Simons Observatory: Overview of data acquisition, control, monitoring, and computer infrastructure

Author: Koopman, BJ, Lashner, J, Saunders, LJ, Hasselfield, M, Bhandarkar, T, Bhimani, S, Choi, SK, Duell, CJ, Galitzki, N, Harrington, K, Hincks, AD, Ho, S-PP, Newburgh, L, Reichardt, CL, Seibert, J, Spisak, J, Westbrook, B, Xu, Z, Zhu, N, Koopman, BJ, Lashner, J, Saunders, LJ, Hasselfield, M, Bhandarkar, T, Bhimani, S, Choi, SK, Duell, CJ, Galitzki, N, Harrington, K, Hincks, AD, Ho, S-PP, Newburgh, L, Reichardt, CL, Seibert, J, Spisak, J, Westbrook, B, Xu, Z, and Zhu, N
Abstract: The Simons Observatory (SO) is an upcoming polarized cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope that will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 transition-edge sensor (TES) bolometers in six spectral bands centered between 27 and 280 GHz to achieve the sensitivity necessary to measure or constrain numerous cosmological parameters, including the tensor-to-scalar ratio, effective number of relativistic species, and sum of the neutrino masses. The SO scientific goals require coordination and control of the hardware distributed among the four telescopes on site. To meet this need, we have designed and built an open-sourced platform for distributed system management, called the Observatory Control System (ocs). This control system interfaces with all subsystems including the telescope control units, the microwave multiplexing readout electronics, and the cryogenic thermometry. We have also developed a system for live monitoring of housekeeping data and alerting, both of which are critical for remote observation. We take advantage of existing open source projects, such as crossbar for RPC and PubSub, twisted for asynchronous events, grafana for online remote monitoring, and docker for containerization. We provide an overview of the SO software and computer infrastructure, including the integration of SO-developed code with open source resources and lessons learned while testing at SO labs developing hardware systems as we prepare for deployment.
Published: 2020

20. The Simons Observatory: Overview of data acquisition, control, monitoring, and computer infrastructure

Author: Guzman, JC, Ibsen, J, Koopman, BJ, Lashner, J, Saunders, LJ, Hasselfield, M, Bhandarkar, T, Bhimani, S, Choi, SK, Duell, CJ, Galitzki, N, Harrington, K, Hincks, AD, Ho, SPP, Newburgh, L, Reichardt, CL, Seibert, J, Spisak, J, Westbrook, B, Xu, Z, Zhu, N, Guzman, JC, Ibsen, J, Koopman, BJ, Lashner, J, Saunders, LJ, Hasselfield, M, Bhandarkar, T, Bhimani, S, Choi, SK, Duell, CJ, Galitzki, N, Harrington, K, Hincks, AD, Ho, SPP, Newburgh, L, Reichardt, CL, Seibert, J, Spisak, J, Westbrook, B, Xu, Z, and Zhu, N
Abstract: The Simons Observatory (SO) will be a cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope, which will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 transition-edge sensor (TES) bolometers in six spectral bands centered between 27 and 280 GHz in order to achieve the sensitivity necessary to measure or constrain numerous cosmological quantities, as outlined in The Simons Observatory Collaboration et al. (2019). To achieve these goals we have built an open-sourced platform, called OCS (Observatory Control System), which orchestrates distributed hardware systems. We provide an overview of the SO software and computer infrastructure.
Published: 2020

21. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Author: Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z
Abstract: We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of zñ = 1.08. There are currently no representative optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of 4.2s. We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro–Frenk–White (NFW) density profiles, we infer a mean mass of M500cñ = (1.7 + 0.4) ´ 1014 M*. We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable universe, beyond the capabilities of optical weak lensing measurements.
Published: 2020

22. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

Author: Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z
Abstract: Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in ground-based CMB experiments. Using this method, we combine multifrequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first wide-area (≈2100 sq. deg.), arcminute-resolution component-separated maps of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure profiles of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper are available on LAMBDA.
Published: 2020

23. Advanced ACTPol TES Device Parameters and Noise Performance in Fielded Arrays

Author: Crowley, K, Austermann, J, Choi, S, Duff, S, Gallardo, P, Ho, S, Hubmayr, J, Koopman, B, Nati, F, Niemack, M, Salatino, M, Simon, S, Staggs, S, Stevens, J, Ullom, J, Vavagiakis, E, Wollack, E, Crowley, KT, Austermann, JE, Choi, SK, Duff, SM, Gallardo, PA, Ho, SPP, Koopman, BJ, Niemack, MD, Simon, SM, Staggs, ST, Stevens, JR, Ullom, JN, Vavagiakis, EM, Wollack, EJ, Crowley, K, Austermann, J, Choi, S, Duff, S, Gallardo, P, Ho, S, Hubmayr, J, Koopman, B, Nati, F, Niemack, M, Salatino, M, Simon, S, Staggs, S, Stevens, J, Ullom, J, Vavagiakis, E, Wollack, E, Crowley, KT, Austermann, JE, Choi, SK, Duff, SM, Gallardo, PA, Ho, SPP, Koopman, BJ, Niemack, MD, Simon, SM, Staggs, ST, Stevens, JR, Ullom, JN, Vavagiakis, EM, and Wollack, EJ
Abstract: The Advanced ACTPol (AdvACT) upgrade to the Atacama Cosmology Telescope (ACT) features arrays of aluminum manganese transition-edge sensors (TESes) optimized for ground-based observations of the cosmic microwave background (CMB). Array testing shows highly responsive detectors with anticipated in-band noise performance under optical loading. We report on TES parameters measured with impedance data taken on a subset of TESes. We then compare modeled noise spectral densities to measurements. We find excess noise at frequencies around 100 Hz, nearly outside of the signal band of CMB measurements. In addition, we describe full-array noise measurements in the laboratory and in the field for two new AdvACT mid-frequency arrays, sensitive at bands centered on 90 and 150 GHz, and data for the high-frequency array (150/230 GHz) as deployed.
Published: 2018

24. Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

Author: Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, Wollack, EJ, Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, and Wollack, EJ
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

25. Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

Author: Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, Wollack, EJ, Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, and Wollack, EJ
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

26. Far sidelobe effects from panel gaps of the Atacama Cosmology Telescope

Author: Fluxá, R, Pedro, A, Dünner, R, Maurin, L, Choi, S, Devlin, M, Gallardo, P, Ho, S, Koopman, B, Louis, T, Mcmahon, J, Nati, F, Niemack, M, Newburgh, L, Page, L, Salatino, M, Schillaci, A, Schmitt, B, Simon, S, Staggs, S, Wollack, E, Choi, SK, Devlin, MJ, Gallardo, PA, Ho, SP, Koopman, BJ, McMahon, JJ, Niemack, MD, Page, LA, Schmitt, BL, Simon, SM, Staggs, ST, Wollack, EJ, Fluxá, R, Pedro, A, Dünner, R, Maurin, L, Choi, S, Devlin, M, Gallardo, P, Ho, S, Koopman, B, Louis, T, Mcmahon, J, Nati, F, Niemack, M, Newburgh, L, Page, L, Salatino, M, Schillaci, A, Schmitt, B, Simon, S, Staggs, S, Wollack, E, Choi, SK, Devlin, MJ, Gallardo, PA, Ho, SP, Koopman, BJ, McMahon, JJ, Niemack, MD, Page, LA, Schmitt, BL, Simon, SM, Staggs, ST, and Wollack, EJ
Abstract: The Atacama Cosmology Telescope is a 6 meter diameter CMB telescope located at 5200 meters in the Chilean desert. ACT has made arc-minute scale maps of the sky at 90 and 150 GHz which have led to precise measurements of the fine angular power spectrum of the CMB fluctuations in temperature and polarization. One of the goals of ACT is to search for the B-mode polarization signal from primordial gravity waves, and thus extending ACT's data analysis to larger angular scales. This goal introduces new challenges in the control of systematic effects, including better understanding of far sidelobe effects that might enter the power spectrum at degree angular scales. Here we study the effects of the gaps between panels of the ACT primary and secondary reflectors in the worst case scenario in which the gaps remain open. We produced numerical simulations of the optics using GRASP up to 8 degrees away from the main beam and simulated timestreams for observations with this beam using real pointing information from ACT data. Maps from these simulated timestreams showed leakage from the sidelobes, indicating that this effect must be taken into consideration at large angular scales.
Published: 2016

27. Assembly and integration process of the first high density detector array for the Atacama Cosmology Telescope

Author: Li, Y, Choi, S, Ho, S, Crowley, K, Salatino, M, Simon, S, Staggs, S, Nati, F, Ward, J, Schmitt, B, Henderson, S, Koopman, B, Gallardo, P, Vavagiakis, E, Niemack, M, Mcmahon, J, Duff, S, Schillaci, A, Hubmayr, J, Hilton, G, Beall, J, Wollack, E, Ho, SP, Crowley, KT, Simon, SM, Staggs, ST, Schmitt, BL, Koopman, BJ, Gallardo, PA, Vavagiakis, EM, Niemack, MD, McMahon, J, Duff, SM, Hilton, GC, Beall, JA, Wollack, EJ, Li, Y, Choi, S, Ho, S, Crowley, K, Salatino, M, Simon, S, Staggs, S, Nati, F, Ward, J, Schmitt, B, Henderson, S, Koopman, B, Gallardo, P, Vavagiakis, E, Niemack, M, Mcmahon, J, Duff, S, Schillaci, A, Hubmayr, J, Hilton, G, Beall, J, Wollack, E, Ho, SP, Crowley, KT, Simon, SM, Staggs, ST, Schmitt, BL, Koopman, BJ, Gallardo, PA, Vavagiakis, EM, Niemack, MD, McMahon, J, Duff, SM, Hilton, GC, Beall, JA, and Wollack, EJ
Abstract: The Advanced ACTPol (AdvACT) upgrade on the Atacama Cosmology Telescope (ACT) consists of multichroic Transition Edge Sensor (TES) detector arrays to measure the Cosmic Microwave Background (CMB) polarization anisotropies in multiple frequency bands. The first AdvACT detector array, sensitive to both 150 and 230 GHz, is fabricated on a 150 mm diameter wafer and read out with a completely different scheme compared to ACTPol. Approximately 2000 TES bolometers are packed into the wafer leading to both a much denser detector density and readout circuitry. The demonstration of the assembly and integration of the AdvACT arrays is important for the next generation CMB experiments, which will continue to increase the pixel number and density. We present the detailed assembly process of the first AdvACT detector array.
Published: 2016

28. Survey strategy optimization for the Atacama Cosmology Telescope

Author: De Bernardis, F, Stevens, J, Hasselfield, M, Alonso, D, Bond, J, Calabrese, E, Choi, S, Crowley, K, Devlin, M, Dunkley, J, Gallardo, P, Henderson, S, Hilton, M, Hlozek, R, Ho, S, Huffenberger, K, Koopman, B, Kosowsky, A, Louis, T, Madhavacheril, M, Mcmahon, J, Næss, S, Nati, F, Newburgh, L, Niemack, M, Page, L, Salatino, M, Schillaci, A, Schmitt, B, Sehgal, N, Sievers, J, Simon, S, Spergel, D, Staggs, S, Van Engelen, A, Vavagiakis, E, Wollack, E, Stevens, JR, Bond, JR, Choi, SK, Crowley, K T, Gallardo, PA, Henderson, SW, Ho, SP, Koopman, BJ, Madhavacheril, M S, McMahon, J, Niemack, MD, Page, LA, Schmitt, BL, Sievers, JL, Simon, SM, Spergel, DN, Staggs, ST, Vavagiakis, E M, Wollack, EJ, De Bernardis, F, Stevens, J, Hasselfield, M, Alonso, D, Bond, J, Calabrese, E, Choi, S, Crowley, K, Devlin, M, Dunkley, J, Gallardo, P, Henderson, S, Hilton, M, Hlozek, R, Ho, S, Huffenberger, K, Koopman, B, Kosowsky, A, Louis, T, Madhavacheril, M, Mcmahon, J, Næss, S, Nati, F, Newburgh, L, Niemack, M, Page, L, Salatino, M, Schillaci, A, Schmitt, B, Sehgal, N, Sievers, J, Simon, S, Spergel, D, Staggs, S, Van Engelen, A, Vavagiakis, E, Wollack, E, Stevens, JR, Bond, JR, Choi, SK, Crowley, K T, Gallardo, PA, Henderson, SW, Ho, SP, Koopman, BJ, Madhavacheril, M S, McMahon, J, Niemack, MD, Page, LA, Schmitt, BL, Sievers, JL, Simon, SM, Spergel, DN, Staggs, ST, Vavagiakis, E M, and Wollack, EJ
Abstract: In recent years there have been significant improvements in the sensitivity and the angular resolution of the instruments dedicated to the observation of the Cosmic Microwave Background (CMB). ACTPol is the first polarization receiver for the Atacama Cosmology Telescope (ACT) and is observing the CMB sky with arcmin resolution over ∼2000 sq. deg. Its upgrade, Advanced ACTPol (AdvACT), will observe the CMB in five frequency bands and over a larger area of the sky. We describe the optimization and implementation of the ACTPol and AdvACT surveys. The selection of the observed fields is driven mainly by the science goals, that is, small angular scale CMB measurements, B-mode measurements and cross-correlation studies. For the ACTPol survey we have observed patches of the southern galactic sky with low galactic foreground emissions which were also chosen to maximize the overlap with several galaxy surveys to allow unique cross-correlation studies. A wider field in the northern galactic cap ensured significant additional overlap with the BOSS spectroscopic survey. The exact shapes and footprints of the fields were optimized to achieve uniform coverage and to obtain cross-linked maps by observing the fields with different scan directions. We have maximized the efficiency of the survey by implementing a close to 24 hour observing strategy, switching between daytime and nighttime observing plans and minimizing the telescope idle time. We describe the challenges represented by the survey optimization for the significantly wider area observed by AdvACT, which will observe roughly half of the low-foreground sky. The survey strategies described here may prove useful for planning future ground-based CMB surveys, such as the Simons Observatory and CMB Stage IV surveys.
Published: 2016

29. Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

Author: Henderson, S, Stevens, J, Amiri, M, Austermann, J, Beall, J, Chaudhuri, S, Cho, H, Choi, S, Cothard, N, Crowley, K, Duff, S, Fitzgerald, C, Gallardo, P, Halpern, M, Hasselfield, M, Hilton, G, Ho, S, Hubmayr, J, Irwin, K, Koopman, B, Li, D, Li, Y, Mcmahon, J, Nati, F, Niemack, M, Reintsema, C, Salatino, M, Schillaci, A, Schmitt, B, Simon, S, Staggs, S, Vavagiakis, E, Ward, J, Henderson, SW, Stevens, JR, Beall, JA, Cho, HM, Choi, SK, Cothard, NF, Crowley, KT, Duff, SM, Fitzgerald, CP, Gallardo, PA, Ho, SP, Irwin, KD, Koopman, BJ, McMahon, J, Reintsema, CD, Schmitt, BL, Simon, SM, Staggs, ST, Vavagiakis, EM, Ward, JT, Henderson, S, Stevens, J, Amiri, M, Austermann, J, Beall, J, Chaudhuri, S, Cho, H, Choi, S, Cothard, N, Crowley, K, Duff, S, Fitzgerald, C, Gallardo, P, Halpern, M, Hasselfield, M, Hilton, G, Ho, S, Hubmayr, J, Irwin, K, Koopman, B, Li, D, Li, Y, Mcmahon, J, Nati, F, Niemack, M, Reintsema, C, Salatino, M, Schillaci, A, Schmitt, B, Simon, S, Staggs, S, Vavagiakis, E, Ward, J, Henderson, SW, Stevens, JR, Beall, JA, Cho, HM, Choi, SK, Cothard, NF, Crowley, KT, Duff, SM, Fitzgerald, CP, Gallardo, PA, Ho, SP, Irwin, KD, Koopman, BJ, McMahon, J, Reintsema, CD, Schmitt, BL, Simon, SM, Staggs, ST, Vavagiakis, EM, and Ward, JT
Abstract: Advanced ACTPol is an instrument upgrade for the six-meter Atacama Cosmology Telescope (ACT) designed to measure the cosmic microwave background (CMB) temperature and polarization with arcminute-scale angular resolution. To achieve its science goals, Advanced ACTPol utilizes a larger readout multiplexing factor than any previous CMB experiment to measure detector arrays with approximately two thousand transition-edge sensor (TES) bolometers in each 150 mm detector wafer. We present the implementation and testing of the Advanced ACTPol time-division multiplexing readout architecture with a 64-row multiplexing factor. This includes testing of individual multichroic detector pixels and superconducting quantum interference device (SQUID) multiplexing chips as well as testing and optimizing of the integrated readout electronics. In particular, we describe the new automated multiplexing SQUID tuning procedure developed to select and optimize the thousands of SQUID parameters required to readout each Advanced ACTPol array. The multichroic detector pixels in each array use separate channels for each polarization and each of the two frequencies, such that four TESes must be read out per pixel. Challenges addressed include doubling the number of detectors per multiplexed readout channel compared to ACTPol and optimizing the Nyquist inductance to minimize detector and SQUID noise aliasing.
Published: 2016

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29 results on '"Koopman BJ"'

1. The Simons Observatory: Cryogenic half wave plate rotation mechanism for the small aperture telescopes

2. The atacama cosmology telescope: A catalog of >4000 Sunyaev–Zel’dovich galaxy clusters

3. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

4. The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

5. The Atacama Cosmology Telescope: A Search for Planet 9

6. The mass and galaxy distribution around SZ-selected clusters

7. The atacama cosmology telescope: Summary of dr4 and dr5 data products and data access

8. The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

9. The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev-Zel'dovich Galaxy Clusters

10. The mass and galaxy distribution around SZ-selected clusters

11. The atacama cosmology telescope: A catalog of >4000 Sunyaev–Zel’dovich galaxy clusters

12. The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

13. The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

14. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

15. The atacama cosmology telescope: Summary of dr4 and dr5 data products and data access

16. The Atacama Cosmology Telescope: A Search for Planet 9

17. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

18. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

19. The Simons Observatory: Overview of data acquisition, control, monitoring, and computer infrastructure

20. The Simons Observatory: Overview of data acquisition, control, monitoring, and computer infrastructure

21. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

22. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

23. Advanced ACTPol TES Device Parameters and Noise Performance in Fielded Arrays

24. Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

25. Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

26. Far sidelobe effects from panel gaps of the Atacama Cosmology Telescope

27. Assembly and integration process of the first high density detector array for the Atacama Cosmology Telescope

28. Survey strategy optimization for the Atacama Cosmology Telescope

29. Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

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29 results on '"Koopman BJ"'

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