QE/Gain ratio maps

HRC-I XRCF QE/Gain ratio maps

B K

183 eV

O K

525 eV

Al K

1487 eV

Ti K

4511 eV

HRC-I Flight QE/Gain ratio maps

B K 183 eV	C K 277 eV	O K 525 eV	Ni L 852 eV
Al K 1487 eV	Ag L 2984 eV	Ti K 4511 eV	Fe K 6404 eV

QE-Gain scatter plots

Scatter plots of the QE and Gain of each image/gain cell of SAC flat fields (blocking factor of 128), from within the CsI coated region (XRCF images were truncated to exclude the vignetted area). Due to the large number of data points (11772 for Flight, 8175 for XRCF), only 1/15 of the points are plotted, selected randomly. The QE values have been normalized, such that the mean of the central 12% of each flat field image is scaled to unity. Scaling factors were determined by eye, so that the curves for all energies are continuous.

B	red	scale factor = 1
O	green	scale factor = 1.2
Al	blue	scale factor = 1.4
Ti	black	scale factor = 1.5

B	red	scale factor = 1
C	yellow	scale factor = 1.05
O	green	scale factor = 1.15
Al	cyan	scale factor = 1.2
Ag	blue	scale factor = 1.25
Fe	magenta	scale factor = 1.27
Ti	black	scale factor = 1.3