[37.02] Imaging Large Scale Structure in the X-ray Sky

HEAD 2003 Meeting
Session 37. Cosmic X-ray Background and Deep Surveys II
Oral, Tuesday, March 25, 2003, 9:00-10:00am

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[37.02] Imaging Large Scale Structure in the X-ray Sky

Y. Yang (UMCP), R.F. Mushotzky (NASA/GSFC), L.L. Cowie (U.Hawaii/IfA), A.J. Barger (U.Wisconsin, U.Hawaii/IfA), D.B. Sanders (U.Hawaii/IfA), A.T. Steffen (U.WIsconsin)

We present the first results from a wide solid angle, moderately deep Chandra survey of the Lockman Hole North West Region. Our 9 ACIS-I fields cover an effective solid angle of 0.4 deg² and reach a depth of 3 \times 10^-16 erg cm^-2 s^-1 in the 0.4--2 keV band and 3 \times 10^-15 erg cm^-2 s^-1 in the 2--8 kev band. The best fit logN-logS for the entire field, the largest contiguous Chandra field yet observed, matches well onto that of the Chandra Deep Field North. This indicates that over 90% of the 2--8 keV X-ray background is resolved into point sources. We show that the full range of the `cosmic variance' previously seen in different Chandra fields is reproduced in this small region of the sky. Analysis of the counts-in-cells shows that the hard band sources are more strongly correlated than the soft band sources.

The author(s) of this abstract have provided an email address for comments about the abstract: yyang@astro.umd.edu

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