Imaging Large Scale Structure in the X-ray Sky

Abstract

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.

To be published in ApJL v585

References in corpus (1)

• The CYDER Survey: First Results

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