Correlative Analysis of GRBs detected by Swift and Suzaku-WAM

Journal Article · Thu May 22 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2943426· OSTI ID:21137180

Krimm, Hans ^[1]; Yamaoka, Kazutaka; Sugita, Satoshi ^[2]; Ohno, Masanori ^[3]; Tashiro, Makoto; Onda, Kaori ^[4]; Sato, Goro ^[5]; Sakamoto, Takanori ^[1]

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1. CRESST, NASA Goddard Space Flight Center (United States)
2. Aoyama Gakuin University (Japan)
3. Hiroshima University (Japan)
4. Saitama University (Japan)
5. NASA Goddard Space Flight Center (United States)

Since most gamma-ray bursts (GRBs) have a peak energy (Epeak) above the energy range (15-150 keV) of the Burst Alert Telescope (BAT) on Swift, a full understanding of the prompt emission from Swift GRBs requires spectral fits over as broad an energy range as possible. This can be done for bursts which are simultaneously detected by Swift BAT and the Suzaku Wide-band All-Sky Monitor (WAM), which covers the energy range from 50-5000 keV. Since the launch of Suzaku in July 2005, there have been 33 gamma-ray bursts (GRBs) which have triggered both Swift and WAM. A joint BAT-WAM team has cross-calibrated the two instruments using GRBs, and we are now able to perform joint fits on these bursts to determine spectral parameters including Epeak. The results of broad spectral fits allows us to understand the distribution of Epeak for Swift bursts and to calibrate Epeak estimators when Epeak is within the BAT energy range. For those bursts with spectroscopic redshifts, we can calculate the isotropic energy and study various correlations between Epeak and other global burst parameters. Here we present preliminary results of joint Swift/BAT-Suzaku/WAM spectral fits.

• OSTI ID: 21137180
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1000; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATIONS
COSMIC GAMMA BURSTS
COSMIC GAMMA SOURCES
COSMIC PHOTONS
DISTRIBUTION
GAMMA ASTRONOMY
GAMMA DETECTION
KEV RANGE
RED SHIFT