The Chandra COSMOS Survey. I. overview and point source catalog

Martin Elvis; Francesca Civano; Cristian Vignali; Simonetta Puccetti; Fabrizio Fiore; Nico Cappelluti; T. L. Aldcroft; Antonella Fruscione; G. Zamorani; Andrea Comastri; Marcella Brusa; Roberto Gilli; Takamitsu Miyaji; Francesco Damiani; Anton M. Koekemoer; Alexis Finoguenov; Hermann Brunner; C. M. Urry; John Silverman; Vincenzo Mainieri; Guenther Hasinger; Richard Griffiths; Marcella Carollo; Heng Hao; Luigi Guzzo; Andrew Blain; Daniela Calzetti; C. Carilli; Peter Capak; Stefano Ettori; Giuseppina Fabbiano; Chris Impey; Simon Lilly; Bahram Mobasher; Michael Rich; Mara Salvato; D. B. Sanders; Eva Schinnerer; N. Scoville; Patrick Shopbell; James E. Taylor; Yoshiaki Taniguchi; Marta Volonteri

doi:10.1088/0067-0049/184/1/158

The Chandra COSMOS Survey. I. overview and point source catalog

Martin Elvis, Francesca Civano, Cristian Vignali, Simonetta Puccetti, Fabrizio Fiore, Nico Cappelluti, T. L. Aldcroft, Antonella Fruscione, G. Zamorani, Andrea Comastri, Marcella Brusa, Roberto Gilli, Takamitsu Miyaji, Francesco Damiani, Anton M. Koekemoer, Alexis Finoguenov, Hermann Brunner, C. M. Urry, John Silverman, Vincenzo MainieriGuenther Hasinger, Richard Griffiths, Marcella Carollo, Heng Hao, Luigi Guzzo, Andrew Blain, Daniela Calzetti, C. Carilli, Peter Capak, Stefano Ettori, Giuseppina Fabbiano, Chris Impey, Simon Lilly, Bahram Mobasher, Michael Rich, Mara Salvato, D. B. Sanders, Eva Schinnerer, N. Scoville, Patrick Shopbell, James E. Taylor, Yoshiaki Taniguchi, Marta Volonteri

Astronomy

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

393 Scopus citations

Abstract

The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.5 deg² of the COSMOS field (centered at 10^h, +02^o) with an effective exposure of ∼160 ks, and an outer 0.4 deg² area with an effective exposure of ∼80 ks. The limiting source detection depths are 1.9 × 10^-16 erg cm ^-2 s^-1 in the soft (0.5-2 keV) band, 7.3 × 10 ^-16 erg cm^-2 s^-1 in the hard (2-10 keV) band, and 5.7 × 10^-16 erg cm^-2 s^-1 in the full (0.5-10 keV) band. Here we describe the strategy, design, and execution of the C-COSMOS survey, and present the catalog of 1761 point sources detected at a probability of being spurious of <2 × 10^-5 (1655 in the full, 1340 in the soft, and 1017 in the hard bands). By using a grid of 36 heavily (∼50%) overlapping pointing positions with the ACIS-I imager, a remarkably uniform (12%) exposure across the inner 0.5 deg² field was obtained, leading to a sharply defined lower flux limit. The widely different point-spread functions obtained in each exposure at each point in the field required a novel source detection method, because of the overlapping tiling strategy, which is described in a companion paper. This method produced reliable sources down to a 7-12 counts, as verified by the resulting logN-logS curve, with subarcsecond positions, enabling optical and infrared identifications of virtually all sources, as reported in a second companion paper. The full catalog is described here in detail and is available online.

Original language	English (US)
Pages (from-to)	158-171
Number of pages	14
Journal	Astrophysical Journal, Supplement Series
Volume	184
Issue number	1
DOIs	https://doi.org/10.1088/0067-0049/184/1/158
State	Published - 2009

Keywords

Catalogs
Cosmology: observations
Galaxies: evolution
Quasars: general
Surveys
X-rays: general

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1088/0067-0049/184/1/158

Cite this

Elvis, M., Civano, F., Vignali, C., Puccetti, S., Fiore, F., Cappelluti, N., Aldcroft, T. L., Fruscione, A., Zamorani, G., Comastri, A., Brusa, M., Gilli, R., Miyaji, T., Damiani, F., Koekemoer, A. M., Finoguenov, A., Brunner, H., Urry, C. M., Silverman, J., ... Volonteri, M. (2009). The Chandra COSMOS Survey. I. overview and point source catalog. Astrophysical Journal, Supplement Series, 184(1), 158-171. https://doi.org/10.1088/0067-0049/184/1/158

Elvis, M, Civano, F, Vignali, C, Puccetti, S, Fiore, F, Cappelluti, N, Aldcroft, TL, Fruscione, A, Zamorani, G, Comastri, A, Brusa, M, Gilli, R, Miyaji, T, Damiani, F, Koekemoer, AM, Finoguenov, A, Brunner, H, Urry, CM, Silverman, J, Mainieri, V, Hasinger, G, Griffiths, R, Carollo, M, Hao, H, Guzzo, L, Blain, A, Calzetti, D, Carilli, C, Capak, P, Ettori, S, Fabbiano, G, Impey, C, Lilly, S, Mobasher, B, Rich, M, Salvato, M, Sanders, DB, Schinnerer, E, Scoville, N, Shopbell, P, Taylor, JE, Taniguchi, Y & Volonteri, M 2009, 'The Chandra COSMOS Survey. I. overview and point source catalog', Astrophysical Journal, Supplement Series, vol. 184, no. 1, pp. 158-171. https://doi.org/10.1088/0067-0049/184/1/158

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abstract = "The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.5 deg2 of the COSMOS field (centered at 10h, +02o) with an effective exposure of ∼160 ks, and an outer 0.4 deg2 area with an effective exposure of ∼80 ks. The limiting source detection depths are 1.9 × 10-16 erg cm -2 s-1 in the soft (0.5-2 keV) band, 7.3 × 10 -16 erg cm-2 s-1 in the hard (2-10 keV) band, and 5.7 × 10-16 erg cm-2 s-1 in the full (0.5-10 keV) band. Here we describe the strategy, design, and execution of the C-COSMOS survey, and present the catalog of 1761 point sources detected at a probability of being spurious of <2 × 10-5 (1655 in the full, 1340 in the soft, and 1017 in the hard bands). By using a grid of 36 heavily (∼50%) overlapping pointing positions with the ACIS-I imager, a remarkably uniform (12%) exposure across the inner 0.5 deg2 field was obtained, leading to a sharply defined lower flux limit. The widely different point-spread functions obtained in each exposure at each point in the field required a novel source detection method, because of the overlapping tiling strategy, which is described in a companion paper. This method produced reliable sources down to a 7-12 counts, as verified by the resulting logN-logS curve, with subarcsecond positions, enabling optical and infrared identifications of virtually all sources, as reported in a second companion paper. The full catalog is described here in detail and is available online.",

keywords = "Catalogs, Cosmology: observations, Galaxies: evolution, Quasars: general, Surveys, X-rays: general",

author = "Martin Elvis and Francesca Civano and Cristian Vignali and Simonetta Puccetti and Fabrizio Fiore and Nico Cappelluti and Aldcroft, {T. L.} and Antonella Fruscione and G. Zamorani and Andrea Comastri and Marcella Brusa and Roberto Gilli and Takamitsu Miyaji and Francesco Damiani and Koekemoer, {Anton M.} and Alexis Finoguenov and Hermann Brunner and Urry, {C. M.} and John Silverman and Vincenzo Mainieri and Guenther Hasinger and Richard Griffiths and Marcella Carollo and Heng Hao and Luigi Guzzo and Andrew Blain and Daniela Calzetti and C. Carilli and Peter Capak and Stefano Ettori and Giuseppina Fabbiano and Chris Impey and Simon Lilly and Bahram Mobasher and Michael Rich and Mara Salvato and Sanders, {D. B.} and Eva Schinnerer and N. Scoville and Patrick Shopbell and Taylor, {James E.} and Yoshiaki Taniguchi and Marta Volonteri",

year = "2009",

doi = "10.1088/0067-0049/184/1/158",

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pages = "158--171",

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T1 - The Chandra COSMOS Survey. I. overview and point source catalog

AU - Elvis, Martin

AU - Civano, Francesca

AU - Vignali, Cristian

AU - Puccetti, Simonetta

AU - Fiore, Fabrizio

AU - Cappelluti, Nico

AU - Aldcroft, T. L.

AU - Fruscione, Antonella

AU - Zamorani, G.

AU - Comastri, Andrea

AU - Brusa, Marcella

AU - Gilli, Roberto

AU - Miyaji, Takamitsu

AU - Damiani, Francesco

AU - Koekemoer, Anton M.

AU - Finoguenov, Alexis

AU - Brunner, Hermann

AU - Urry, C. M.

AU - Silverman, John

AU - Mainieri, Vincenzo

AU - Hasinger, Guenther

AU - Griffiths, Richard

AU - Carollo, Marcella

AU - Hao, Heng

AU - Guzzo, Luigi

AU - Blain, Andrew

AU - Calzetti, Daniela

AU - Carilli, C.

AU - Capak, Peter

AU - Ettori, Stefano

AU - Fabbiano, Giuseppina

AU - Impey, Chris

AU - Lilly, Simon

AU - Mobasher, Bahram

AU - Rich, Michael

AU - Salvato, Mara

AU - Sanders, D. B.

AU - Schinnerer, Eva

AU - Scoville, N.

AU - Shopbell, Patrick

AU - Taylor, James E.

AU - Taniguchi, Yoshiaki

AU - Volonteri, Marta

PY - 2009

Y1 - 2009

N2 - The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.5 deg2 of the COSMOS field (centered at 10h, +02o) with an effective exposure of ∼160 ks, and an outer 0.4 deg2 area with an effective exposure of ∼80 ks. The limiting source detection depths are 1.9 × 10-16 erg cm -2 s-1 in the soft (0.5-2 keV) band, 7.3 × 10 -16 erg cm-2 s-1 in the hard (2-10 keV) band, and 5.7 × 10-16 erg cm-2 s-1 in the full (0.5-10 keV) band. Here we describe the strategy, design, and execution of the C-COSMOS survey, and present the catalog of 1761 point sources detected at a probability of being spurious of <2 × 10-5 (1655 in the full, 1340 in the soft, and 1017 in the hard bands). By using a grid of 36 heavily (∼50%) overlapping pointing positions with the ACIS-I imager, a remarkably uniform (12%) exposure across the inner 0.5 deg2 field was obtained, leading to a sharply defined lower flux limit. The widely different point-spread functions obtained in each exposure at each point in the field required a novel source detection method, because of the overlapping tiling strategy, which is described in a companion paper. This method produced reliable sources down to a 7-12 counts, as verified by the resulting logN-logS curve, with subarcsecond positions, enabling optical and infrared identifications of virtually all sources, as reported in a second companion paper. The full catalog is described here in detail and is available online.

AB - The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.5 deg2 of the COSMOS field (centered at 10h, +02o) with an effective exposure of ∼160 ks, and an outer 0.4 deg2 area with an effective exposure of ∼80 ks. The limiting source detection depths are 1.9 × 10-16 erg cm -2 s-1 in the soft (0.5-2 keV) band, 7.3 × 10 -16 erg cm-2 s-1 in the hard (2-10 keV) band, and 5.7 × 10-16 erg cm-2 s-1 in the full (0.5-10 keV) band. Here we describe the strategy, design, and execution of the C-COSMOS survey, and present the catalog of 1761 point sources detected at a probability of being spurious of <2 × 10-5 (1655 in the full, 1340 in the soft, and 1017 in the hard bands). By using a grid of 36 heavily (∼50%) overlapping pointing positions with the ACIS-I imager, a remarkably uniform (12%) exposure across the inner 0.5 deg2 field was obtained, leading to a sharply defined lower flux limit. The widely different point-spread functions obtained in each exposure at each point in the field required a novel source detection method, because of the overlapping tiling strategy, which is described in a companion paper. This method produced reliable sources down to a 7-12 counts, as verified by the resulting logN-logS curve, with subarcsecond positions, enabling optical and infrared identifications of virtually all sources, as reported in a second companion paper. The full catalog is described here in detail and is available online.

KW - Catalogs

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Quasars: general

KW - Surveys

KW - X-rays: general

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JO - Astrophysical Journal, Supplement Series

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The Chandra COSMOS Survey. I. overview and point source catalog

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The Chandra COSMOS Survey. I. overview and point source catalog

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