The HELLAS2XMM survey: I. The X-ray data and the Log(N)-Log(S)

Details The HELLAS2XMM survey: I. The X-ray data and the Log(N)-Log(S) The HELLAS2XMM survey: I. The X-ray data and the Log(N)-Log(S)

2001-08-31

arxiv.org/abs/astro-ph/0108514v1

Astronomy and Astrophysics

Astrophysics

9 pages, 3 figures included, LaTeX emulateapj5.sty, accepted for publication by the Astrophysical Journal

Scientific paper

10.1086/324261

We present the first results from an XMM-Newton serendipitous medium-deep survey, which covers nearly three square degrees. We detect a total of 1022, 495 and 100 sources, down to minimum fluxes of about 5.9 x 10^-16, 2.8 x 10^-15 and 6.2 x 10^-15 erg cm^-2 s^-1, in the 0.5-2, 2-10 and 4.5-10 keV band, respectively. In the soft band this is one of the largest samples available to date and surely the largest in the 2-10 keV band at our limiting X-ray flux. The measured Log(N)-Log(S) are found to be in good agreement with previous determinations. In the 0.5-2 keV band we detect a break at fluxes around 5 x 10^-15 erg cm^-2 s^-1. In the harder bands, we fill in the gap at intermediate fluxes between deeper Chandra and XMM-Newton observations and shallower BeppoSAX and ASCA surveys.

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