Imaging Large Scale Structure in the X-ray Sky

Details Imaging Large Scale Structure in the X-ray Sky Imaging Large Scale Structure in the X-ray Sky

2003-02-07

arxiv.org/abs/astro-ph/0302137v1

Astrophys.J. 585 (2003) L85-L88

Astronomy and Astrophysics

Astrophysics

To be published in ApJL v585

Scientific paper

10.1086/374372

We present the first results from a wide solid angle, moderately deep {\it Chandra} survey of the Lockman Hole North-West region. Our 9 ACIS-I fields cover an effective solid angle of 0.4 deg$^{2}$ and reach a depth of $3 \times 10^{-16}$ \ergpcmsqps in the 0.4--2 keV band and $3 \times 10^{-15}$ \ergpcmsqps in the 2--8 keV band. The best fit logN-logS for the entire field, the largest contiguous {\it Chandra} field yet observed, matches well onto that of the {\it Chandra} Deep Field North. We show that the full range of the `cosmic variance' previously seen in different {\it Chandra} fields is reproduced in this small region of the sky. Counts-in-cells analysis shows that the hard band sources are more strongly correlated than the soft band sources.

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