The XMM-Newton wide-field survey in the COSMOS field. I. Survey description

作者：Hasinger G^*; Cappelluti N; Brunner H; Brusa M; Comastri A; Elvis M; Finoguenov A; Fiore F; Franceschini A; Gilli R; Griffiths R E; Lehmann I; Mainieri V; Matt G; Matute I; Miyaji T; Molendi S; Paltani S; Sanders D B; Scoville N; Tresse L; Urry C M; Vettolani P; Zamorani G

来源：Astrophysical Journal, The - Supplement Series, 2007, 172(1): 29-37.

DOI：10.1086/516576

• cosmology : observations
• large-scale structure of universe
• dark matter
• galaxies : formation
• galaxies : evolution
• X-rays : galaxies

We present the first set of XMM-Newton EPIC observations in the 2 deg(2) COSMOS field. The strength of the COSMOS project is the unprecedented combination of a large solid angle and sensitivity over the whole multiwavelength spectrum. The XMM-Newton observations are very efficient in localizing and identifying active galactic nuclei ( AGNs) and clusters, as well as groups of galaxies. One of the primary goals of the XMM-Newton Cosmos survey is to study the coevolution of active galactic nuclei as a function of their environment in the cosmic web. Here we present the log of observations, images, and a summary of first research highlights for the first pass of 25 XMM-Newton pointings across the field. In the existing data set we have detected 1416 new X-ray sources in the 0.5-2, 2-4.5, and 4.5- 10 keV bands to an equivalent 0.5-2 keV flux limit of 7x 10(-16) erg cm(-2) s(-1). The number of sources is expected to grow to almost 2000 in the final coverage of the survey. From an X- ray color-color analysis we identify a population of heavily obscured, partially leaky or reflecting absorbers, most of which are likely to be nearby, Compton-thick AGNs.

• 出版日期2007-9