Hrc S Background Maps

The background map is created as follows:

• Add up all HRC S 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 column is year, the second column is a dead time corrected yearly comulative background time. The third column is a stowed background map with event 1 data scaled so that details show up. The fourth column is the same data but unified scale for all years. The fifth and sixth columns are similar to those of the third and the fourth, but status bit corrected data. If you click on the year or one of the maps, it will take to the larger map of the map.

Year	Time (sec) Total Event Numbers	Evt1 (Peak Area)	Evt1 (Same Scale)	Lev2 (Peak Area)	Lev2 (Same Scale)
2000	5,703 1,168,593
2001	7,940 1,632,923
2002	7,208 1,504,125
2003	5,632 1,203,880
2004	4,644 1,175,115
2005	13,020 3,542,110
2006	6,961 2,347,363
2007	3,220 1,150,583
2008	9,215 3,427,345
2009	5,910 2,361,985
2010	10,083 3,760,622
2011	2,802 834,898
2012	5,693 1,565,378
2013	5,881 1,724,070
2014	12,360 2,821,763
2015	4,768 1,156,210
2016	8,637 3,383,489
2017	13,014 4,495,635
2018	9,919 3,429,965
2019	6,300 2,251,565
2020	7,273 2,620,250
2021	30,537 11,015,643
2022	842 0
Cumulative Maps
Total	187,562 58,573,510

If you have any questions about this page, please contact: swolk@cfa.harvard.edu.