Speaker
Description
Starting from the first unequivocal detection of very high energy (VHE) emission from the luminous gamma-ray burst (GRB) GRB 190114C by the MAGIC telescopes, four detections of VHE emission from GRBs by ground-based telescopes were reported as of today. Such new energetic components were missing for a long time and these observations have become a new probe to explore GRB physics. In order to deepen our understanding, more GRB observations by VHE instruments are crucial. GRB 201015A was detected by the Swift/BAT and the duration of its prompt emission was measured as 9.78 +- 3.47 seconds. We started fast follow-up observations of this GRB with the MAGIC telescopes about 30 seconds after its onset under good observational conditions. Subsequent optical observations measured the redshift of the host galaxy as 0.42 and found the associated type Ic-BL supernova. The total isotropic equivalent energy of the prompt emission is then estimated to be the order of 10^50 erg, which means this is a long GRB with a relatively low luminosity. In this sense, GRB 201015A may have similar properties to GRB 190829A whose VHE emission was detected by the H.E.S.S. telescopes. The accurate analysis of the MAGIC data confirms the strong hint of detection, implying a significant energy release in the TeV range, comparable with that of the prompt emission in the keV-MeV band. We report these results and theoretical interpretation of GRB 201015A emission.
Keywords
GRB; very high energy emission; MAGIC
| Subcategory | Experimental Results |
|---|---|
| Collaboration | MAGIC |
