Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17108k&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present preliminary results from a Chandra mini-survey of the Lockman Hole (LH) region of the sky. This LH mini-survey consists of 21 separate ACIS-I observations each of ~ 5000 seconds. The observations are centered on the ROSAT Ultra Deep Survey and are arranged in a mosaic with a total field of view of ~ 1.35 deg^2. This unique set of observations allows us to calculate source statistics over a relatively wide, contiguous field of view with good angular resolution and uniform coverage. Our observations reach a flux of ~ 5 × 10-15 ergs cm-2 s-1 in the 0.5-2 keV band and ~ 2 × 10-14 ergs cm-2 s-1 in the 2-10 keV band. Our full-band sample has 402 sources of which 340 are detected in the soft band and 114 are detected in the hard band. In addition to the point sources, three extended sources are also detected; two of which have been identified as clusters. We calculate the number versus flux relationships (N(S) and N(>S)) for our source sample. In addition, we calculate the two point correlation of the point sources using MARX based Monte Carlo techniques. A cumulative spectrum of the point sources is obtained. Our techniques and results are compared to previous observations of the LH and to other deep observations. Funding for this research was provided by NASA contract NAS8-38248.
Kenter Almus
Meehan Gary
Murray Stephen S.
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