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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 158-171 |
| Number of pages | 14 |
| Journal | Astrophysical Journal, Supplement Series |
| Volume | 184 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2009 |
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Keywords
- Catalogs
- Cosmology: observations
- Galaxies: evolution
- Quasars: general
- Surveys
- X-rays: general
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
The Chandra COSMOS Survey. I. overview and point source catalog. / Elvis, Martin; Civano, Francesca; Vignali, Cristian; Puccetti, Simonetta; Fiore, Fabrizio; Cappelluti, Nico; Aldcroft, T. L.; Fruscione, Antonella; Zamorani, G.; Comastri, Andrea; Brusa, Marcella; Gilli, Roberto; Miyaji, Takamitsu; Damiani, Francesco; Koekemoer, Anton M.; Finoguenov, Alexis; Brunner, Hermann; Urry, C. M.; Silverman, John; Mainieri, Vincenzo; Hasinger, Guenther; Griffiths, Richard; Carollo, Marcella; Hao, Heng; Guzzo, Luigi; Blain, Andrew; Calzetti, Daniela; Carilli, C.; Capak, Peter; Ettori, Stefano; Fabbiano, Giuseppina; Impey, Christopher D; Lilly, Simon; Mobasher, Bahram; Rich, Michael; Salvato, Mara; Sanders, D. B.; Schinnerer, Eva; Scoville, N.; Shopbell, Patrick; Taylor, James E.; Taniguchi, Yoshiaki; Volonteri, Marta.
In: Astrophysical Journal, Supplement Series, Vol. 184, No. 1, 2009, p. 158-171.Research output: Contribution to journal › Article
}
TY - JOUR
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, Christopher D
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
UR - http://www.scopus.com/inward/record.url?scp=70549105591&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70549105591&partnerID=8YFLogxK
U2 - 10.1088/0067-0049/184/1/158
DO - 10.1088/0067-0049/184/1/158
M3 - Article
AN - SCOPUS:70549105591
VL - 184
SP - 158
EP - 171
JO - Astrophysical Journal, Supplement Series
JF - Astrophysical Journal, Supplement Series
SN - 0067-0049
IS - 1
ER -