
*****************************************************************************************

HRC-I Background Files -- Current as of CalDB 4.7.7

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FILENAME			  Cal Validity Start Date	EXPOSURE (s)

hrciD2000-01-01bkgrndN0002.fits	  2000-01-01T00:00:00		94286.0
hrciD2001-01-01bkgrndN0002.fits	  2001-01-01T00:00:00		67123.0
hrciD2002-01-01bkgrndN0002.fits	  2002-01-01T00:00:00		70536.0
hrciD2003-01-01bkgrndN0002.fits	  2003-01-01T00:00:00		42566.0
hrciD2004-01-01bkgrndN0002.fits	  2004-01-01T00:00:00		41427.0
hrciD2005-01-01bkgrndN0002.fits	  2005-01-01T00:00:00		42410.0
hrciD2006-01-01bkgrndN0002.fits	  2006-01-01T00:00:00		31951.0
hrciD2007-01-01bkgrndN0002.fits	  2007-01-01T00:00:00		41021.0
hrciD2008-01-01bkgrndN0002.fits	  2008-01-01T00:00:00		37121.0
hrciD2009-01-01bkgrndN0002.fits	  2009-01-01T00:00:00		32430.0
hrciD2010-01-01bkgrndN0002.fits	  2010-01-01T00:00:00		16477.0
hrciD2011-01-01bkgrndN0002.fits	  2011-01-01T00:00:00		31653.0
hrciD2012-01-01bkgrndN0002.fits	  2012-01-01T00:00:00		17411.0
hrciD2013-01-01bkgrndN0002.fits	  2013-01-01T00:00:00		44456.0
hrciD2014-01-01bkgrndN0002.fits	  2014-01-01T00:00:00		28782.0
hrciD2015-01-01bkgrndN0003.fits	  2015-01-01T00:00:00		14356.0
hrciD2016-01-01bkgrndN0001.fits	  2016-01-01T00:00:00		16942.0
hrciD2017-01-01bkgrndN0001.fits	  2017-01-01T00:00:00		18545.0


Previous versions of the files, no longer being circulated:

FILENAME			  Cal Validity Start Date	EXPOSURE (s)

Retired in CalDB 4.7.7:
hrciD2015-01-01bkgrndN0002.fits	  2015-01-01T00:00:00		10528.0

Retired in CalDB 4.7.0:
hrciD1999-12-06bkgrndN0001.fits	  1999-12-06T00:00:00		94286.0
hrciD2001-01-01bkgrndN0001.fits	  2001-01-01T00:00:00		67123.0
hrciD2002-01-01bkgrndN0001.fits	  2002-01-01T00:00:00		70536.0
hrciD2003-01-01bkgrndN0001.fits	  2003-01-01T00:00:00		42566.0
hrciD2004-01-01bkgrndN0001.fits	  2004-01-01T00:00:00		41427.0
hrciD2005-01-01bkgrndN0001.fits	  2005-01-01T00:00:00		42410.0
hrciD2006-01-01bkgrndN0001.fits	  2006-01-01T00:00:00		31951.0
hrciD2007-01-01bkgrndN0001.fits	  2007-01-01T00:00:00		41021.0
hrciD2008-01-01bkgrndN0001.fits	  2008-01-01T00:00:00		37121.0
hrciD2009-01-01bkgrndN0001.fits	  2009-01-01T00:00:00		32430.0

Files to be added approximately annually. Event lists are compiled
from HRC-I stowed background compilations, which include mostly Cosmic
Ray particle events.
