HRC-I amp_sf correction and filtering comparison

Flat field images from the HRC-I laboratory calibration (June 1997) were reprocessed, making use of two routines for correcting the telemetered values of the crossed-grid charge detector amplifier scale factor (amp_sf). A detailed account of the need for this correction can be found in a memo by Mike Juda. The "fix 1" routine is based on an algorithm by Steve Murray, described in another memo by Mike Juda. The "fix 2" routine is based on Mike Juda's own algorithm. Status bit filters were then applied to the "fixed" event lists.

[ratio maps]

  No filtering Standard filter without H-test or Saturation test Standard filter with H-test and Saturation test Standard filter with Saturation test (no H-test) Standard filter with H-test (no Saturation test)
B K
183 eV


[75 - 150]
fix 1
fix2
C K
277 eV


[600 - 900]
fix 1
fix2
O K
525 eV


[600 - 900]
fix 1
fix2
Ni L
852 eV


[600 - 900]
fix 1
fix2
Al K
1487 eV


[600 - 900]
fix 1
fix2
Ag L
2984 eV


[600 - 900]
fix 1
fix2
Ti K
4511 eV


[600 - 900]
fix 1
fix2
Fe K
6404 eV


[600 - 900]
fix 1
fix2