ISGRI
ISGRI count rates for the Crab have been read from the
isgri_sky_res.fits files produced by OSA7 with the same settings as for the Galactic Bulge Observations light curves. The average count-rates are as follows: Band A (18-40 keV), 1 Crab = 206cps; Band B (40-100 keV), 1 Crab = 103 cps (averaged over all epochs and off-axis angles). There are variations in the ISGRI count rates with off-axis angles of ~ few % up to ~10 degrees from the pointing direction; ISGRI has shown a small systematic decline in count rate from the Crab of ~ 5% in the last 2 years.
ISGRI Data files: MJD, +/-, Flux (cps), +/-, off-axis (deg), ScW-ID
Crab_isgri_lc_18-40.dat
Crab_isgri_lc_40-100.dat
JEM-X 1
JEM-X 1 count rates for the Crab have been read from the jmx1_sky_ima.fits files produced by OSA7 with the same settings as for the Galactic Bulge Observations light curves. Fluxes are read from teh images using mosaic_spec. The average count-rates, at less than 4 degrees off-axis are as follows: Band A (3-10 keV), 1 Crab = 88 cps; Band B (10-25 keV), 1 Crab = 32 cps. Outside of 4 degrees off-axis the response falls off sharply and uncertainty on the flux increases.
JEMX-1 Data files: MJD, +/-, Flux (cps), +/-, off-axis (deg), ScW-ID
Crab_jmx_lc_3-10.dat
Crab_jmx_lc_10-25.dat
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