About Chandra Archive Proposer Instruments & Calibration Newsletters Data Analysis HelpDesk Calibration Database NASA Archives & Centers Chandra Science Links


Filtered Background Map for the HRC-I

Count Rate
(After HV Change)

The color scale indicates the range of count rates for the average background derived from all 21 pointings in this instrumental configuration. After applying the H-test filter, the raw data were first blocked 8x8 and then, after averaging, smoothed using a Gaussian with a sigma of 40 blocked pixels. The color scale was selected so as to maximize the contrast of any features within the image. This data can also be seen as a percentage difference from the mean and as a 3-D projection on an absolute scale. Or you can see all six plots at once

Comments to cxccal@cfa.harvard.edu




Last modified: 09/25/12



The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory.
60 Garden Street, Cambridge, MA 02138 USA.    Email: cxcweb@head.cfa.harvard.edu
Smithsonian Institution, Copyright © 1998-2004. All rights reserved.