Time resolved spectroscopy of GRB 030501 using INTEGRAL

Details Time resolved spectroscopy of GRB 030501 using INTEGRAL Time resolved spectroscopy of GRB 030501 using INTEGRAL

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...411l.327b&link_type=abstract

Astronomy and Astrophysics, v.411, p.L327-L330 (2003)

Astronomy and Astrophysics

Astrophysics

9

Gamma Rays: Bursts, Gamma Rays: Observations

Scientific paper

The gamma-ray instruments on-board INTEGRAL offer an unique opportunity to perform time resolved analysis on GRBs. The imager IBIS allows accurate positioning of GRBs and broad band spectral analysis, while SPI provides high resolution spectroscopy. GRB 030501 was discovered by the INTEGRAL Burst Alert System in the ISGRI field of view. Although the burst was fairly weak (fluence F20-200 keV =~ 3.5 x 10-6 erg cm-2) it was possible to perform time resolved spectroscopy with a resolution of a few seconds. The GRB shows a spectrum in the 20-400 keV range which is consistent with a spectral index Gamma = -1.8. No emission line or spectral break was detectable in the spectrum. Although the flux seems to be correlated with the hardness of the GRB spectrum, there is no clear soft to hard evolution seen over the duration of the burst. The INTEGRAL data have been compared with results from the Ulysses and RHESSI experiments.
Based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic and Poland, and with the participation of Russia and the USA.

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