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THE CHANDRA COSMOS ...
THE CHANDRA COSMOS LEGACY SURVEY : OPTICAL/IR IDENTIFICATIONS
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- Marchesi, S. (author)
- University of Bologna,Harvard–Smithsonian Center for Astrophysics,Yale University
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- Civano, F. (author)
- Harvard–Smithsonian Center for Astrophysics,Yale University
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- Elvis, M. (author)
- Harvard–Smithsonian Center for Astrophysics
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- Salvato, M. (author)
- Max Planck Institute for Extraterrestrial Physics
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- Brusa, M. (author)
- INAF Osservatorio Astronomico di Bologna,University of Bologna
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- Comastri, A. (author)
- INAF Osservatorio Astronomico di Bologna
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- Gilli, R. (author)
- INAF Osservatorio Astronomico di Bologna
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- Hasinger, G. (author)
- University of Hawai'i at Hilo
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- Lanzuisi, G. (author)
- INAF Osservatorio Astronomico di Bologna,University of Bologna
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- Miyaji, T. (author)
- National Autonomous University of Mexico,University of California, San Diego
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- Treister, E. (author)
- University of Concepción
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- Urry, C. M. (author)
- Yale University
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- Vignali, C. (author)
- University of Bologna,INAF Osservatorio Astronomico di Bologna
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- Zamorani, G. (author)
- INAF Osservatorio Astronomico di Bologna
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- Allevato, V. (author)
- University of Helsinki
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- Cappelluti, N. (author)
- INAF Osservatorio Astronomico di Bologna
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- Cardamone, C. (author)
- Boston University
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- Finoguenov, A. (author)
- University of Helsinki
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- Griffiths, R. E. (author)
- University of Hawai'i at Hilo
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- Karim, A. (author)
- University of Bonn
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- Laigle, C. (author)
- Paris-Sorbonne University
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- Lamassa, S. M. (author)
- Yale University
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- Jahnke, K. (author)
- Max Planck Institute for Astronomy
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- Ranalli, P. (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Schawinski, K. (author)
- ETH Zürich
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- Schinnerer, E. (author)
- National Radio Astronomy Observatory Socorro,Max Planck Institute for Astronomy
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- Silverman, J. D. (author)
- University of Tokyo
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- Smolcic, V. (author)
- University of Zagreb
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- Suh, H. (author)
- University of Hawai'i at Hilo,Harvard–Smithsonian Center for Astrophysics
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- Trakhtenbrot, B. (author)
- ETH Zürich
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(creator_code:org_t)
- 2016
- 2016
- English.
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In: Astrophysical Journal. - 0004-637X. ; 817:1
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.3...
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Abstract
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- We present the catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6 Ms Chandra program on the 2.2 deg2 of the COSMOS field, combination of 56 new overlapping observations obtained in Cycle 14 with the previous C-COSMOS survey. In this Paper we report the i, K, and 3.6 μm identifications of the 2273 X-ray point sources detected in the new Cycle 14 observations. We use the likelihood ratio technique to derive the association of optical/infrared (IR) counterparts for 97% of the X-ray sources. We also update the information for the 1743 sources detected in C-COSMOS, using new K and 3.6 μm information not available when the C-COSMOS analysis was performed. The final catalog contains 4016 X-ray sources, 97% of which have an optical/IR counterpart and a photometric redshift, while ≃54% of the sources have a spectroscopic redshift. The full catalog, including spectroscopic and photometric redshifts and optical and X-ray properties described here in detail, is available online. We study several X-ray to optical (X/O) properties: with our large statistics we put better constraints on the X/O flux ratio locus, finding a shift toward faint optical magnitudes in both soft and hard X-ray band. We confirm the existence of a correlation between X/O and the the 2-10 keV luminosity for Type 2 sources. We extend to low luminosities the analysis of the correlation between the fraction of obscured AGNs and the hard band luminosity, finding a different behavior between the optically and X-ray classified obscured fraction.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- catalogs
- cosmology: observations
- galaxies: active
- galaxies: evolution
- surveys
- X-rays: general
Publication and Content Type
- for (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Marchesi, S.
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Civano, F.
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Elvis, M.
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Salvato, M.
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Brusa, M.
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Comastri, A.
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Gilli, R.
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Hasinger, G.
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Lanzuisi, G.
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Miyaji, T.
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Treister, E.
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Urry, C. M.
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Vignali, C.
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Zamorani, G.
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Allevato, V.
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Cappelluti, N.
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Cardamone, C.
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Finoguenov, A.
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Griffiths, R. E.
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Karim, A.
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Laigle, C.
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Lamassa, S. M.
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Jahnke, K.
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Ranalli, P.
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Schawinski, K.
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Schinnerer, E.
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Silverman, J. D.
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Smolcic, V.
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Suh, H.
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Trakhtenbrot, B.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Lund University