The Atacama Cosmology Telescope: High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip

Erik D. Reese; Tony Mroczkowski; Felipe Menanteau; Matt Hilton; Jonathan Sievers; Paula Aguirre; John William Appel; Andrew J. Baker; J. Richard Bond; Sudeep Das; Mark J. Devlin; Simon R. Dicker; Rolando Dünner; Thomas Essinger-Hileman; Joseph W. Fowler; Amir Hajian; Mark Halpern; Matthew Hasselfield; J. Colin Hill; Adam D. Hincks; Kevin M. Huffenberger; John P. Hughes; Kent D. Irwin; Jeff Klein; Arthur Kosowsky; Yen Ting Lin; Tobias A. Marriage; Danica Marsden; Kavilan Moodley; Michael D. Niemack; Michael R. Nolta; Lyman A. Page; Lucas Parker; Bruce Partridge; Felipe Rojas; Neelima Sehgal; Cristóbal Sifón; David N. Spergel; Suzanne T. Staggs; Daniel S. Swetz; Eric R. Switzer; Robert Thornton; Hy Trac; Edward J. Wollack

doi:10.1088/0004-637X/751/1/12

The Atacama Cosmology Telescope: High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip

Erik D. Reese, Tony Mroczkowski, Felipe Menanteau, Matt Hilton, Jonathan Sievers, Paula Aguirre, John William Appel, Andrew J. Baker, J. Richard Bond, Sudeep Das, Mark J. Devlin, Simon R. Dicker, Rolando Dünner, Thomas Essinger-Hileman, Joseph W. Fowler, Amir Hajian, Mark Halpern, Matthew Hasselfield, J. Colin Hill, Adam D. HincksKevin M. Huffenberger, John P. Hughes, Kent D. Irwin, Jeff Klein, Arthur Kosowsky, Yen Ting Lin, Tobias A. Marriage, Danica Marsden, Kavilan Moodley, Michael D. Niemack, Michael R. Nolta, Lyman A. Page, Lucas Parker, Bruce Partridge, Felipe Rojas, Neelima Sehgal, Cristóbal Sifón, David N. Spergel, Suzanne T. Staggs, Daniel S. Swetz, Eric R. Switzer, Robert Thornton, Hy Trac, Edward J. Wollack

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Abstract

We present follow-up observations with the Sunyaev-Zel'dovich Array (SZA) of optically confirmed galaxy clusters found in the equatorial survey region of the Atacama Cosmology Telescope (ACT): ACT-CL J0022-0036, ACT-CL J2051+0057, and ACT-CL J2337+0016. ACT-CL J0022-0036 is a newly discovered, massive (≃ 10¹⁵ M), high-redshift (z = 0.81) cluster revealed by ACT through the Sunyaev-Zel'dovich effect (SZE). Deep, targeted observations with the SZA allow us to probe a broader range of cluster spatial scales, better disentangle cluster decrements from radio point-source emission, and derive more robust integrated SZE flux and mass estimates than we can with ACT data alone. For the two clusters we detect with the SZA we compute integrated SZE signal and derive masses from the SZA data only. ACT-CL J2337+0016, also known as A2631, has archival Chandra data that allow an additional X-ray-based mass estimate. Optical richness is also used to estimate cluster masses and shows good agreement with the SZE and X-ray-based estimates. Based on the point sources detected by the SZA in these three cluster fields and an extrapolation to ACT's frequency, we estimate that point sources could be contaminating the SZE decrement at the ≲ 20% level for some fraction of clusters.

Original language	English (US)
Article number	12
Journal	Astrophysical Journal
Volume	751
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/751/1/12
State	Published - May 20 2012

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

X-rays: galaxies: clusters
cosmic background radiation
cosmology: observations
galaxies: clusters: general
techniques: interferometric

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10.1088/0004-637X/751/1/12

Cite this

Reese, E. D., Mroczkowski, T., Menanteau, F., Hilton, M., Sievers, J., Aguirre, P., Appel, J. W., Baker, A. J., Bond, J. R., Das, S., Devlin, M. J., Dicker, S. R., Dünner, R., Essinger-Hileman, T., Fowler, J. W., Hajian, A., Halpern, M., Hasselfield, M., Hill, J. C., ... Wollack, E. J. (2012). The Atacama Cosmology Telescope: High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip. Astrophysical Journal, 751(1), Article 12. https://doi.org/10.1088/0004-637X/751/1/12

@article{ea4910e814954c8d91f5e1ddbaf606c0,

title = "The Atacama Cosmology Telescope: High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip",

abstract = "We present follow-up observations with the Sunyaev-Zel'dovich Array (SZA) of optically confirmed galaxy clusters found in the equatorial survey region of the Atacama Cosmology Telescope (ACT): ACT-CL J0022-0036, ACT-CL J2051+0057, and ACT-CL J2337+0016. ACT-CL J0022-0036 is a newly discovered, massive (≃ 1015 M), high-redshift (z = 0.81) cluster revealed by ACT through the Sunyaev-Zel'dovich effect (SZE). Deep, targeted observations with the SZA allow us to probe a broader range of cluster spatial scales, better disentangle cluster decrements from radio point-source emission, and derive more robust integrated SZE flux and mass estimates than we can with ACT data alone. For the two clusters we detect with the SZA we compute integrated SZE signal and derive masses from the SZA data only. ACT-CL J2337+0016, also known as A2631, has archival Chandra data that allow an additional X-ray-based mass estimate. Optical richness is also used to estimate cluster masses and shows good agreement with the SZE and X-ray-based estimates. Based on the point sources detected by the SZA in these three cluster fields and an extrapolation to ACT's frequency, we estimate that point sources could be contaminating the SZE decrement at the ≲ 20% level for some fraction of clusters.",

keywords = "X-rays: galaxies: clusters, cosmic background radiation, cosmology: observations, galaxies: clusters: general, techniques: interferometric",

author = "Reese, {Erik D.} and Tony Mroczkowski and Felipe Menanteau and Matt Hilton and Jonathan Sievers and Paula Aguirre and Appel, {John William} and Baker, {Andrew J.} and Bond, {J. Richard} and Sudeep Das and Devlin, {Mark J.} and Dicker, {Simon R.} and Rolando D{\"u}nner and Thomas Essinger-Hileman and Fowler, {Joseph W.} and Amir Hajian and Mark Halpern and Matthew Hasselfield and Hill, {J. Colin} and Hincks, {Adam D.} and Huffenberger, {Kevin M.} and Hughes, {John P.} and Irwin, {Kent D.} and Jeff Klein and Arthur Kosowsky and Lin, {Yen Ting} and Marriage, {Tobias A.} and Danica Marsden and Kavilan Moodley and Niemack, {Michael D.} and Nolta, {Michael R.} and Page, {Lyman A.} and Lucas Parker and Bruce Partridge and Felipe Rojas and Neelima Sehgal and Crist{\'o}bal Sif{\'o}n and Spergel, {David N.} and Staggs, {Suzanne T.} and Swetz, {Daniel S.} and Switzer, {Eric R.} and Robert Thornton and Hy Trac and Wollack, {Edward J.}",

year = "2012",

month = may,

day = "20",

doi = "10.1088/0004-637X/751/1/12",

language = "English (US)",

volume = "751",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

}

Reese, ED, Mroczkowski, T, Menanteau, F, Hilton, M, Sievers, J, Aguirre, P, Appel, JW, Baker, AJ, Bond, JR, Das, S, Devlin, MJ, Dicker, SR, Dünner, R, Essinger-Hileman, T, Fowler, JW, Hajian, A, Halpern, M, Hasselfield, M, Hill, JC, Hincks, AD, Huffenberger, KM, Hughes, JP, Irwin, KD, Klein, J, Kosowsky, A, Lin, YT, Marriage, TA, Marsden, D, Moodley, K, Niemack, MD, Nolta, MR, Page, LA, Parker, L, Partridge, B, Rojas, F, Sehgal, N, Sifón, C, Spergel, DN, Staggs, ST, Swetz, DS, Switzer, ER, Thornton, R, Trac, H & Wollack, EJ 2012, 'The Atacama Cosmology Telescope: High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip', Astrophysical Journal, vol. 751, no. 1, 12. https://doi.org/10.1088/0004-637X/751/1/12

TY - JOUR

T1 - The Atacama Cosmology Telescope

T2 - High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip

AU - Reese, Erik D.

AU - Mroczkowski, Tony

AU - Menanteau, Felipe

AU - Hilton, Matt

AU - Sievers, Jonathan

AU - Aguirre, Paula

AU - Appel, John William

AU - Baker, Andrew J.

AU - Bond, J. Richard

AU - Das, Sudeep

AU - Devlin, Mark J.

AU - Dicker, Simon R.

AU - Dünner, Rolando

AU - Essinger-Hileman, Thomas

AU - Fowler, Joseph W.

AU - Hajian, Amir

AU - Halpern, Mark

AU - Hasselfield, Matthew

AU - Hill, J. Colin

AU - Hincks, Adam D.

AU - Huffenberger, Kevin M.

AU - Hughes, John P.

AU - Irwin, Kent D.

AU - Klein, Jeff

AU - Kosowsky, Arthur

AU - Lin, Yen Ting

AU - Marriage, Tobias A.

AU - Marsden, Danica

AU - Moodley, Kavilan

AU - Niemack, Michael D.

AU - Nolta, Michael R.

AU - Page, Lyman A.

AU - Parker, Lucas

AU - Partridge, Bruce

AU - Rojas, Felipe

AU - Sehgal, Neelima

AU - Sifón, Cristóbal

AU - Spergel, David N.

AU - Staggs, Suzanne T.

AU - Swetz, Daniel S.

AU - Switzer, Eric R.

AU - Thornton, Robert

AU - Trac, Hy

AU - Wollack, Edward J.

PY - 2012/5/20

Y1 - 2012/5/20

N2 - We present follow-up observations with the Sunyaev-Zel'dovich Array (SZA) of optically confirmed galaxy clusters found in the equatorial survey region of the Atacama Cosmology Telescope (ACT): ACT-CL J0022-0036, ACT-CL J2051+0057, and ACT-CL J2337+0016. ACT-CL J0022-0036 is a newly discovered, massive (≃ 1015 M), high-redshift (z = 0.81) cluster revealed by ACT through the Sunyaev-Zel'dovich effect (SZE). Deep, targeted observations with the SZA allow us to probe a broader range of cluster spatial scales, better disentangle cluster decrements from radio point-source emission, and derive more robust integrated SZE flux and mass estimates than we can with ACT data alone. For the two clusters we detect with the SZA we compute integrated SZE signal and derive masses from the SZA data only. ACT-CL J2337+0016, also known as A2631, has archival Chandra data that allow an additional X-ray-based mass estimate. Optical richness is also used to estimate cluster masses and shows good agreement with the SZE and X-ray-based estimates. Based on the point sources detected by the SZA in these three cluster fields and an extrapolation to ACT's frequency, we estimate that point sources could be contaminating the SZE decrement at the ≲ 20% level for some fraction of clusters.

AB - We present follow-up observations with the Sunyaev-Zel'dovich Array (SZA) of optically confirmed galaxy clusters found in the equatorial survey region of the Atacama Cosmology Telescope (ACT): ACT-CL J0022-0036, ACT-CL J2051+0057, and ACT-CL J2337+0016. ACT-CL J0022-0036 is a newly discovered, massive (≃ 1015 M), high-redshift (z = 0.81) cluster revealed by ACT through the Sunyaev-Zel'dovich effect (SZE). Deep, targeted observations with the SZA allow us to probe a broader range of cluster spatial scales, better disentangle cluster decrements from radio point-source emission, and derive more robust integrated SZE flux and mass estimates than we can with ACT data alone. For the two clusters we detect with the SZA we compute integrated SZE signal and derive masses from the SZA data only. ACT-CL J2337+0016, also known as A2631, has archival Chandra data that allow an additional X-ray-based mass estimate. Optical richness is also used to estimate cluster masses and shows good agreement with the SZE and X-ray-based estimates. Based on the point sources detected by the SZA in these three cluster fields and an extrapolation to ACT's frequency, we estimate that point sources could be contaminating the SZE decrement at the ≲ 20% level for some fraction of clusters.

KW - X-rays: galaxies: clusters

KW - cosmic background radiation

KW - cosmology: observations

KW - galaxies: clusters: general

KW - techniques: interferometric

UR - http://www.scopus.com/inward/record.url?scp=84860733273&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860733273&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/751/1/12

DO - 10.1088/0004-637X/751/1/12

M3 - Article

AN - SCOPUS:84860733273

SN - 0004-637X

VL - 751

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 12

ER -

The Atacama Cosmology Telescope: High-resolution Sunyaev-Zel'dovich Array observations of ACT SZE-Selected clusters from the equatorial strip

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