Off-source Fluctuation Analysis of the Deep Chandra Observation on the Hubble Deep Field

Details Off-source Fluctuation Analysis of the Deep Chandra Observation on the Hubble Deep Field Off-source Fluctuation Analysis of the Deep Chandra Observation on the Hubble Deep Field

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.2603m&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #26.03; Bulletin of the American Astronomical Society, Vol. 32, p.1223

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the first results of the off-source spatial fluctuation analyses of the initial ~ 160 ks of Chandra GT observation on the Hubble Deep Field (HDF). The distributions of counts in cells in the source-excluded Chandra ACIS-I images in a few energy bands are compared with those expected from flux-distribution (Log N-Log S) models using simulations including non-uniformity of exposure over the field of view (FOV) and off-axis angle-dependent point-spread function (PSF). We also make a number of 'sensitivity checks' of the results on spatial variation of quantum efficiencies and non-cosmic backgrounds over the FOV. This "fluctuation analysis" can constrain the behavior of the Log N-Log S function down to an order of magnitude fainter than the source detection limit.

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