The VLA-COSMOS 3 GHz Large Project: Continuum data and source catalog release

被引：269

作者：

Smolcic, V. ^{[1
]}

Novak, M. ^{[1
,2
]}

Bondi, M. ^{[3
]}

Ciliegi, P.

Mooley, K. P. ^{[4
]}

Schinnerer, E. ^{[5
]}

Zamorani, G. ^{[3
]}

Navarrete, F. ^{[6
]}

Bourke, S. ^{[4
]}

Karim, A. ^{[6
]}

Vardoulaki, E. ^{[6
]}

Leslie, S. ^{[5
]}

Delhaize, J. ^{[1
]}

Carilli, C. L. ^{[7
]}

Myers, S. T. ^{[7
]}

Baran, N. ^{[1
]}

Delvecchio, I. ^{[1
]}

Miettinen, O. ^{[1
]}

Banfield, J. ^{[8
,9
]}

Balokovic, M. ^{[4
]}

Bertoldi, F. ^{[6
]}

Capak, P. ^{[10
]}

Frail, D. A. ^{[7
]}

Hallinan, G. ^{[4
]}

Hao, H. ^{[11
]}

Ruiz, N. Herrera ^{[12
]}

Horesh, A. ^{[13
]}

Ilbert, O. ^{[14
]}

Intema, H. ^{[7
]}

Jelic, V. ^{[15
,16
,17
]}

Kloeckner, H. -R. ^{[18
,19
]}

Krpan, J. ^{[1
]}

Kulkarni, S. R.

McCracken, H. ^{[20
,21
]}

Laigle, C. ^{[20
,21
]}

Middleberg, E. ^{[12
]}

Murphy, E. J. ^{[22
]}

Sargent, M. ^{[23
]}

Scoville, N. Z. ^{[4
]}

Sheth, K. ^{[4
,22
]}

机构：

[1] Univ Zagreb, Dept Phys, Bijenicka Cestab 32, Zagreb 10002, Croatia

[2] Ist Radioastron Bologna INAF, Via P Gobetti 101, I-40129 Bologna, Italy

[3] INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy

[4] CALTECH, MC 249-17,1200 East Calif Blvd, Pasadena, CA 91125 USA

[5] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[6] Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany

[7] Natl Radio Astron Observ, POB 0, Socorro, NM 87801 USA

[8] CSIRO, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia

[9] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[10] Spitzer Sci Ctr, 314-6 Caltech, Pasadena, CA 91125 USA

[11] Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA

[12] Ruhr Univ Bochum, Astron Inst, Univ Str 150, D-44801 Bochum, Germany

[13] Weizmann Inst Sci, Benoziyo Ctr Astrophys, IL-76100 Rehovot, Israel

[14] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[15] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands

[16] ASTRON Netherlands Inst Radio Astron, POB 2, NL-7990 AA Dwingeloo, Netherlands

[17] Rudjer Boskovic Inst, Bijenicka Cesta 54, Zagreb 10000, Croatia

[18] Univ Oxford, Subdept Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[19] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[20] Univ Paris 06, Sorbonne Univ, UPMC, 98Bis Bd Arago, F-75014 Paris, France

[21] CNRS, IAP, UMR 7095, 98Bis Bd Arago, F-75014 Paris, France

[22] Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[23] Univ Sussex, Dept Phys & Astron, Ctr Astron, Brighton BN1 9QH, E Sussex, England

来源：

ASTRONOMY & ASTROPHYSICS | 2017年 / 602卷

关键词：

catalogs; cosmology: observations; radio continuum: galaxies; STAR-FORMATION HISTORY; AZTEC MILLIMETER SURVEY; ACTIVE GALACTIC NUCLEI; RADIO SPECTRAL INDEX; PHOENIX DEEP SURVEY; LEGACY SURVEY; 20; CM; GMRT OBSERVATIONS; ASTRONOMICAL DATA; IMAGING SURVEY;

D O I：

10.1051/0004-6361/201628704

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the VLA-COSMOS 3 GHz Large Project based on 384 h of observations with the Karl G. Jansky Very Large Array (VLA) at 3 GHz (10 cm) toward the two square degree Cosmic Evolution Survey (COSMOS) field. The final mosaic reaches a median rms of 2.3 degrees Jy beam 1 over the two square degrees at an angular resolution of 0.75 ''. To fully account for the spectral shape and resolution variations across the broad (2 GHz) band, we image all data with a multiscale, multifrequency synthesis algorithm. We present a catalog of 10 830 radio sources down to 5 degrees, out of which 67 are combined from multiple components. Comparing the positions of our 3 GHz sources with those from the Very Long Baseline Array (VLBA)-COSMOS survey, we estimate that the astrometry is accurate to 0 : 01 0 0 at the bright end (signal-to-noise ratio, S = N3 GHz > 20). Survival analysis on our data combined with the VLA-COSMOS 1.4 GHz Joint Project catalog yields an expected median radio spectral index of alpha = 0 : 7. We compute completeness corrections via Monte Carlo simulations to derive the corrected 3 GHz source counts. Our counts are in agreement with previously derived 3 GHz counts based on single-pointing (0 : 087 square degrees) VLA data. In summary, the VLA-COSMOS 3 GHz Large Project simultaneously provides the largest and deepest radio continuum survey at high (0.75 '') angular resolution to date, bridging the gap between last-generation and next-generation surveys.

引用

页数：19

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