MTA Science Instrument Background Report: ACIS Nov 2009

Updated on: 2009-11-23 / DAY OF YEAR: 327 / DAY OF MISSION: 3778



This page shows scientific instrument background data based on Acis observations. A source region file is generated using get_srcregions and then the input event file is filtered using the regions in that file to remove the sources. Details on these tools can be using ahelp.

The plot above is data of the background photon count rates of the entire energy range of ccd6 from Sept 1999 to this week.

If you select a ccd from the table below, it brings up seven plots of that month. The top plot is for the entire energy range. Smaller plots are for super soft, soft, moderate, hard, very hard, and beyond 10 KeV.

Before computing SIB, most extended sources, such as clusters of galaxies, were removed manually to avoid confusion. All point sources were removed automatically by scripts. (NOTE: extended sources were currently removed only for 2003, and 2004.)

The fitted line for the entire period is 4th order polynomials, and it is extended to two years beyond the current time to show a possible SIB level in future. For all others, the fitted line is a linear, and for one year plots, the line is extended 6 months beyond the current date.

If you are interested in checking the scientific instrument background computed with Level 2 data set, please to go to level 2 SIB page.



Name Low (keV)Hight(KeV)Description
SSoft 0.00 0.50 Super soft photons
Soft 0.50 1.00 Soft photons
Med 1.00 3.00 Moderate energy photons
Hard 3.00 5.00 Hard Photons
Harder 5.00 10.00 Very Hard photons
Hardest10.00   Beyond 10 keV


Entire PeriodCCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Past One YearCCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Nov 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Oct 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Sep 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Aug 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Jul 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Jun 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
May 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Apr 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Mar 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Feb 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
Jan 2009CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2008CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2007CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2006CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2005CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2004CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2003CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2002CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2001CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9
2000CCD0 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 CCD8 CCD9