HRC I Background Maps

The background map is created as follows:

• Add up all HRC I event 1 fits files for a given year.
• Create an image file with bin size of 256x256 pixels.
• Compute the background time of the year (including dead time correction) normalized to the background count rate per sec per pixel.

The table blow shows an overview of stowed background changes over years. The fist row is year, the second row is a dead time corrected yearly comulative background time. The third row is a stowed background map with event 1 data scaled so that details show up. The fourth row is the same data but unified scale for all years. The fifth and sixth rows are similar to those of the third and the fourth, but status bit corrected data. If you click one of the maps, it will take to the larger map of the map.

Year	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012
Total Time (sec)	94,286	67,123	70,536	36,323	41,427	42,410	31,951	45,217	37,121	32,430	16,477	31,653	13,032
Evt 1
Evt 1 (Same Scale)
Lev 2
Lev 2 (Same Scale)

The color scale of the left side panel is different from a year to a year so that the structure of stowed background can be seen clearly. The color scale of the right side panel is same from one year to the next so that the changes in the count rates can be seen clearly.

Year 2000 image file evt1 file
Year 2001 image file evt1 file
Year 2002 image file evt1 file
Year 2003 image file evt1 file
Year 2004 image file evt1 file
Year 2005 image file evt1 file
Year 2006 image file evt1 file
Year 2007 image file evt1 file
Year 2008 image file evt1 file
Year 2009 image file evt1 file
Year 2010 image file evt1 file
Year 2011 image file evt1 file
Year 2012 image file evt1 file

The next panels show background maps and distribution plots with status bit corrections.

Year 2000
Year 2001
Year 2002
Year 2003
Year 2004
Year 2005
Year 2006
Year 2007
Year 2008
Year 2009
Year 2010
Year 2011
Year 2012