Radio sources from A 31 GHz sky survey with the sunyaev-zel'dovich array

Stephen Muchovej; Erik Leitch; John E. Carlstrom; Thomas Culverhouse; Chris Greer; David Hawkins; Ryan Hennessy; Marshall Joy; James Lamb; Michael Loh; Daniel P. Marrone; Amber Miller; Tony Mroczkowski; Clem Pryke; Matthew Sharp; David Woody

doi:10.1088/0004-637X/716/1/521

Radio sources from A 31 GHz sky survey with the sunyaev-zel'dovich array

Stephen Muchovej, Erik Leitch, John E. Carlstrom, Thomas Culverhouse, Chris Greer, David Hawkins, Ryan Hennessy, Marshall Joy, James Lamb, Michael Loh, Daniel P. Marrone, Amber Miller, Tony Mroczkowski, Clem Pryke, Matthew Sharp, David Woody

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

We present the first sample of 31 GHz selected sources to flux levels of 1 mJy. From late 2005 to mid-2007, the Sunyaev-Zel'dovich Array observed 7.7 deg² of the sky at 31 GHz to a median rms of 0.18 mJy beam ^-1. We identify 209 sources at greater than 5σ significance in the 31 GHz maps, ranging in flux from 0.7mJy to 200 mJy. Archival NVSS data at 1.4 GHz and observations at 5 GHz with the Very Large Array are used to characterize the sources. We determine the maximum-likelihood integrated source count to be N(>S) = (27.2 ± 2.5)deg^-2 × (S _mJy)^{-1.18 ± 0.12} over the flux range 0.7-15 mJy. This result is significantly higher than predictions based on 1.4 GHz selected samples, a discrepancy which can be explained by a small shift in the spectral index distribution for faint 1.4 GHz sources. From comparison with previous measurements of sources within the central arcminute of massive clusters, we derive an overdensity of 6.8 4.4, relative to field sources.

Original language	English (US)
Pages (from-to)	521-529
Number of pages	9
Journal	Astrophysical Journal
Volume	716
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/716/1/521
State	Published - 2010

Keywords

Catalogs
Cosmic background radiation
Cosmology: observations
Radio continuum: general
Surveys
Techniques: interferometric

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Muchovej, S., Leitch, E., Carlstrom, J. E., Culverhouse, T., Greer, C., Hawkins, D., Hennessy, R., Joy, M., Lamb, J., Loh, M., Marrone, D. P., Miller, A., Mroczkowski, T., Pryke, C., Sharp, M., & Woody, D. (2010). Radio sources from A 31 GHz sky survey with the sunyaev-zel'dovich array. Astrophysical Journal, 716(1), 521-529. https://doi.org/10.1088/0004-637X/716/1/521

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abstract = "We present the first sample of 31 GHz selected sources to flux levels of 1 mJy. From late 2005 to mid-2007, the Sunyaev-Zel'dovich Array observed 7.7 deg2 of the sky at 31 GHz to a median rms of 0.18 mJy beam -1. We identify 209 sources at greater than 5σ significance in the 31 GHz maps, ranging in flux from 0.7mJy to 200 mJy. Archival NVSS data at 1.4 GHz and observations at 5 GHz with the Very Large Array are used to characterize the sources. We determine the maximum-likelihood integrated source count to be N(>S) = (27.2 ± 2.5)deg-2 × (S mJy)-1.18 ± 0.12 over the flux range 0.7-15 mJy. This result is significantly higher than predictions based on 1.4 GHz selected samples, a discrepancy which can be explained by a small shift in the spectral index distribution for faint 1.4 GHz sources. From comparison with previous measurements of sources within the central arcminute of massive clusters, we derive an overdensity of 6.8 4.4, relative to field sources.",

keywords = "Catalogs, Cosmic background radiation, Cosmology: observations, Radio continuum: general, Surveys, Techniques: interferometric",

author = "Stephen Muchovej and Erik Leitch and Carlstrom, {John E.} and Thomas Culverhouse and Chris Greer and David Hawkins and Ryan Hennessy and Marshall Joy and James Lamb and Michael Loh and Marrone, {Daniel P.} and Amber Miller and Tony Mroczkowski and Clem Pryke and Matthew Sharp and David Woody",

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T1 - Radio sources from A 31 GHz sky survey with the sunyaev-zel'dovich array

AU - Muchovej, Stephen

AU - Leitch, Erik

AU - Carlstrom, John E.

AU - Culverhouse, Thomas

AU - Greer, Chris

AU - Hawkins, David

AU - Hennessy, Ryan

AU - Joy, Marshall

AU - Lamb, James

AU - Loh, Michael

AU - Marrone, Daniel P.

AU - Miller, Amber

AU - Mroczkowski, Tony

AU - Pryke, Clem

AU - Sharp, Matthew

AU - Woody, David

PY - 2010

Y1 - 2010

N2 - We present the first sample of 31 GHz selected sources to flux levels of 1 mJy. From late 2005 to mid-2007, the Sunyaev-Zel'dovich Array observed 7.7 deg2 of the sky at 31 GHz to a median rms of 0.18 mJy beam -1. We identify 209 sources at greater than 5σ significance in the 31 GHz maps, ranging in flux from 0.7mJy to 200 mJy. Archival NVSS data at 1.4 GHz and observations at 5 GHz with the Very Large Array are used to characterize the sources. We determine the maximum-likelihood integrated source count to be N(>S) = (27.2 ± 2.5)deg-2 × (S mJy)-1.18 ± 0.12 over the flux range 0.7-15 mJy. This result is significantly higher than predictions based on 1.4 GHz selected samples, a discrepancy which can be explained by a small shift in the spectral index distribution for faint 1.4 GHz sources. From comparison with previous measurements of sources within the central arcminute of massive clusters, we derive an overdensity of 6.8 4.4, relative to field sources.

AB - We present the first sample of 31 GHz selected sources to flux levels of 1 mJy. From late 2005 to mid-2007, the Sunyaev-Zel'dovich Array observed 7.7 deg2 of the sky at 31 GHz to a median rms of 0.18 mJy beam -1. We identify 209 sources at greater than 5σ significance in the 31 GHz maps, ranging in flux from 0.7mJy to 200 mJy. Archival NVSS data at 1.4 GHz and observations at 5 GHz with the Very Large Array are used to characterize the sources. We determine the maximum-likelihood integrated source count to be N(>S) = (27.2 ± 2.5)deg-2 × (S mJy)-1.18 ± 0.12 over the flux range 0.7-15 mJy. This result is significantly higher than predictions based on 1.4 GHz selected samples, a discrepancy which can be explained by a small shift in the spectral index distribution for faint 1.4 GHz sources. From comparison with previous measurements of sources within the central arcminute of massive clusters, we derive an overdensity of 6.8 4.4, relative to field sources.

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Radio sources from A 31 GHz sky survey with the sunyaev-zel'dovich array

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