The Global Fit Approach to Time-Resolved Spectroscopy of GRBs

Details The Global Fit Approach to Time-Resolved Spectroscopy of GRBs The Global Fit Approach to Time-Resolved Spectroscopy of GRBs

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sngh.conf..235c&link_type=abstract

SCIENCE WITH THE NEW GENERATION OF HIGH ENERGY GAMMA-RAY EXPERIMENTS The Variable Gamma-Ray Sources: Their Identifications and C

Astronomy and Astrophysics

Astrophysics

Gamma-Rays, Spectroscopy, Optimization, Grb

Scientific paper

We describe a general method for time resolved gamma-ray spectroscopy of astrophysical transients - the Global Fit Analysis. Instead of parameterizing individual spectra and analyzing spectral evolution of a transient in terms of numerous individual spectral fit parameters we define a spectral evolution model with a set of constant global parameters and just a few (N=1-2) time dependent variables.
In case of GRBs, Global fits explain spectral variability in terms of single variable component with much simpler properties than normally assumed for GRB emission, being are statistically as good as traditional bin-to-bin fits.

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