GRB Prompt X-ray Emission

Abstract

Abstract. I present the observational properties of the prompt emission of supernova associated GRBs (SN-GRBs) focusing on temporal and spectral characteristics. I compare the properties of SN-GRBs with typical long GRBs to see whether there is a distinct difference or not. Furthermore, I present our attempt to search for hard X-ray emission prior to the discovery date from optically identified type Ibc supernovae using Swift BAT survey data.

An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy

“…No source was seen in the UVOT observations, but a bright point source was found with the XRT (7). Unlike any previously observed long-GRBs (which typically decline substantially on a time scale of minutes), Sw 1644+57 remained bright and highly variable for a prolonged period and went on to retrigger the BAT on three further occasions over the next 48 hours (8). Reexamination of previous g-ray observations of this region showed that the source appears to have been present a few days before the initial trigger but not at earlier times (9).…”