IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
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IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
CTU - Czech Technical University in Prague
Seminars  > New Twists in Our Understanding of Gamma-Ray Bursts
New Twists in Our Understanding of Gamma-Ray Bursts

Date
19.5.2015 14:00
Speaker
Dr. Jochen Greiner Max-Planck-Institut für extraterrestrische Physik, München, Germany


Abstract

I will report on two new observational constraints on the gamma-ray burst (GRB) phenomenon. First, when investigating time-resolved gamma-ray spectra taken with the Fermi/GBM detector, we find that 90% of the spectra are significantly narrower than synchrotron emission, thus contradicting the leading explanation over the last 20 years. Second, we have found a supernova related to a particularly long-duration gamma-ray burst which is more luminous than can be explained by Nickel decay. This challenges our standard idea of black hole formation following a GRB.
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