ROSAT HRI Detector Maps available in the OGIP CALDB

["Ian M George, Code 668, NASA/GSFC, USA (Usque ad mortem bibendum)" <GEORGE@lheavx.gsfc.nasa.gov>]

    ROSAT HRI Detector Maps available in the OGIP CALDB
    ***************************************************

Two new files are available in the OGIP CALDB in
	caldb/data/rosat/hri/cpf/detmaps/

These are briefly described in the README file within the directory
(appended below). Further details on when & how these files should 
be used will be distributed to users by (NASA/GSFC) ROSAT GOF.

Ian M George
NASA/GSFC, HEASARC

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	ROSAT HRI Detector Maps 
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This directory contains two files: be.fits & de_corr.fits

be.fits: The Bright Earth Detector Map for the ROSAT HRI
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  This dataset was created using bright-Earth data from the SASS files
by Steve Snowden (ROSAT GOF at NASA/GSFC) on 1995 Apr 12. Data were 
selected when the Count rate was greater than 8 counts/s and the zenith
angle was greater than 115 degrees.  This detector map is for the 
vignetted component of HRI data, i.e. it should be used to cast effective 
exposure. 

de_corr.fits: The Dark Earth Detector Map for the ROSAT HRI
-----------------------------------------------------------
  This dataset was created using dark-Earth data from the SASS files
by Steve Snowden (ROSAT GOF at NASA/GSFC) on 1995 Apr 12. Data were selected
when the Count rate was greater than 8 counts/s and the zenith angle was
greater than 115 degrees.  This detector map is for the unvignetted component
of HRI data, i.e., it should be used to cast the particle background.  The raw
map was corrected for residual vignetted X-rays

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