Response Matrices


Response matrices for the 4 NFI instruments and for the 2 WFC in FITS OGIP format can be found on our anonymous ftp.

We provide on the same directory several .arf files, corresponding to the on axis effective area for different extraction region radii. The number following the "_" symbol indicates the radius size in arcmin.

This is the first official release of these matrices, which will be followed by updates in the next few months.

The directory contains the following files:

 
hpgspc_ott98.arf		HPGSPC effective area
hpgspc_sep97.rmf		HPGSPC redistribution matrix, 512 channels
lecs_130_124_8_sep97.arf	LECS arf files, 2,4,6,8 arcmin radius regions
lecs_130_126_8_sep97.arf	
lecs_130_128_2_sept97.arf
lecs_130_128_4_sep97.arf
lecs_130_128_6_sep97.arf
lecs_130_128_8_sep97.arf
lecs_sep97.rmf			LECS  redistribution matrix, 1024 channels
mecs1_2_sep97.arf		MECS1 arf files, 2,3,4,6,8 arcmin radius regions
mecs1_3_sep97.arf
mecs1_4_sep97.arf
mecs1_6_sep97.arf
mecs1_8_sep97.arf
mecs1_sep97.rmf			MECS1 redistribution matrix, 256 channels
mecs23_2_sep97.arf		MECS23 arf files, 2,3,4,6,8 arcmin radius regions
mecs23_3_sep97.arf
mecs23_4_sep97.arf
mecs23_6_sep97.arf
mecs23_8_sep97.arf
mecs2_2_sep97.arf		MECS2 arf files, 2,3,4,6,8 arcmin radius regions
mecs2_3_sep97.arf
mecs2_4_sep97.arf
mecs2_6_sep97.arf
mecs2_8_sep97.arf
mecs2_sep97.rmf
mecs3_2_sep97.arf		MECS3 arf files, 2,3,4,6,8 arcmin radius regions
mecs3_3_sep97.arf
mecs3_4_sep97.arf
mecs3_6_sep97.arf
mecs3_8_sep97.arf
mecs3_sep97.rmf
mecs_2_sep97.arf		MECS arf files, 2,3,4,6,8 arcmin radius regions
mecs_3_sep97.arf
mecs_4_sep97.arf
mecs_6_sep97.arf
mecs_8_sep97.arf
offaxis				MECS offaxis arf files
pds_256_sep97.rmf		PSD redistribution matrix, 256 channels, arf included
wfc1_iros_dec97.rmf		WFC1 redistribution matrix
wfc2_iros_dec97.rmf		WFC2 redistribution matrix	

Such matrixes yield less than 5% residuals on the Crab spectrum on the whole band of all NFIs. The figures below show the data/model ratio when a simple absorbed power-law model is applied to the Crab data:

Figure 1. - LECS (upper panel), HPGSPC (middle panel), PDS (lower panel)

Figure 2. - MECS1 (upper panel), MECS2 (middle panel), MECS3 (lower panel)

The relevant values of equivalent hydrogen column density and photon spectral index are the following:

DetectorN_H (10**22; cm-2;)Photon index
LECS0.352.087
MECS10.322.088
MECS20.312.102
MECS30.302.086
HPGSPC0.3 (fixed)2.054
PDS-2.038


Please send questions/problem reports to: helpdesk@sax.sdc.asi.it