GRB 081029: A Step Towards Understanding Multiple Afterglow Components

Details GRB 081029: A Step Towards Understanding Multiple Afterglow Components GRB 081029: A Step Towards Understanding Multiple Afterglow Components

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21710804h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #108.04; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present an analysis of the unusual optical light curve of the gamma-ray burst GRB 081029 at a redshift of z = 3.8479. We combine X-ray and optical observations from Swift with optical and infrared data from REM to obtain a detailed data set extending from ≈ 0.1 ks to ≈ 100 ks after the BAT trigger, and from 10 keV to 1600 nm. The X-ray afterglow showed a shallow initial decay followed by a rapid decay after about 18 ks. The optical afterglow, however, shows an uncharacteristic rise at about 5 ks that has no corresponding feature in the X-ray light curve. The data are not consistent with a single-component jet. It is possible that there are multiple physical components contributing to the afterglow of GRB 081029.

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