Abstract Details

Name: Kuntal Misra
Affiliation: ARIES Nainital
Conference ID: ASI2020_179
Title : The low frequency afterglow of the MAGIC burst GRB 190114C
Authors and Co-Authors : Kuntal Misra, L. Resmi et al. on behalf of a larger collaboration
Abstract Type : Oral
Abstract Category : Extragalactic Astronomy
Abstract : GRB 190114C at a redshift of z=0.425 is the first long Gamma Ray Burst (GRB) with Very High Energy (VHE) detection by the MAGIC telescope. We present our observing campaign at low frequency with ALMA, ATCA and GMRT from ~ 1 days to ~140 days after the burst. Long term low frequency observations reveal the complex nature of the afterglow, which does not conform to the predictions of the standard afterglow model. We find that the microphysical parameters of the external forward shock, representing the share of shock created energy in the non-thermal electron population and magnetic field, are evolving with time.