Spectral Cross-Calibration of Fermi-GBM and INTEGRAL-ISGRI using Gamma-Ray Bursts

Details Spectral Cross-Calibration of Fermi-GBM and INTEGRAL-ISGRI using Gamma-Ray Bursts Spectral Cross-Calibration of Fermi-GBM and INTEGRAL-ISGRI using Gamma-Ray Bursts

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1358..397t&link_type=abstract

GAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 397-400 (2011).

Physics

Telemetry, Spectral Analysis, Telescopes, Data Acquisition, Telemetry: Remote Control, Remote Sensing, Radar, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, X- And Gamma-Ray Telescopes And Instrumentation, Data Acquisition: Hardware And Software

Scientific paper

We present an extended cross-calibration study between the Fermi Gamma-Ray Burst Monitor (GBM) and the INTEGRAL Soft Gamma-Ray Imager ISGRI. A previous sample contained 4 GRBs; GRB081226B; GRB090107B; GRB090625B and GRB090704. A long burst detected by both instruments, GRB090817, provides us with the opportunity to further test the agreement between the previous sample and the new data. GRB090817 contains significant telemetry gaps in the ISGRI data set and methods were devised to account for these gaps. The combined datasets from both instruments for GRB090817 were fit with 3 separate spectral models--a Power Law (PL), Cut-Off Power Law (COPL) and a Band model. The best fit joint spectral model is shown for the time averaged and time resolved joint spectral fits. As a measure of relative flux between the two instruments, a normalisation constant was calculated from the joint spectral fitting.

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