Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.1366y&link_type=abstract
American Astronomical Society, HEAD meeting #9, #13.66; Bulletin of the American Astronomical Society, Vol. 38, p.1290
Astronomy and Astrophysics
Astronomy
Scientific paper
We discuss the diversity of prompt gamma-ray burst (GRB) spectra from high to low energies, comparing optical observations to simultaneous gamma-ray emission. The ROTSE project is a network of unfiltered optical telescopes, capable of 6-8 sec responses to GRB triggers. As GRB events last from fractions of a second to minutes, ROTSE has yielded several observations contemporaneous with the GRB, with a half-dozen detections, and approximately 10 flux limits. These events show a wide variety of relations between gamma-ray and optical spectral and temporal properties. Using optical detections and limits from ROTSE as well as the literature, we constrain the broadband spectral shape during GRB events. With no single result for low-energy emission behavior, GRB models will need to account for diverse outcomes.
ROTSE-III has been supported by NASA grant NNG-04WC41G, NSF grant AST-0407061, the Australian Research Council, the University of New South Wales, the University of Texas, and the University of Michigan.
Aharonian Felix
Akerlof Carl
Ashley Mary
Barthelmy Scott
Gehrels Neil
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