HEASA 2021

Session

Transients

13 Sept 2021, 14:15

Conveners

Transients

• Markus Boettcher (North-West University)

81. The transient high-energy sky seen with H.E.S.S.

Fabian Schüssler (CEA)

13/09/2021, 14:15

Transients

Invited talk

The last years have brought about unprecedented breakthroughs and discoveries in high-energy astro- physics. Most of them are related to transient phenomena and involve an increasing number of cosmic messengers ranging now from radiation across the full electromagnetic spectrum, to high-energy neutrino and gravitational waves. Due to their high sensitivity and increasingly optimized response...

82. On the origin of very-high-energy gamma-rays from gamma-ray bursts

Xiang-Yu Wang (Nanjing University)

13/09/2021, 14:45

Transients

Invited talk

Recently, very high-energy (VHE) photons above 100 GeV were detected from several GRBs (including GRB 190114C, GRB 180720B and GRB 190829A) by IACTs during the afterglow phase. We discuss the origin of VHE emission of GRBs and its implications. We propose that the available broadband data of these GRBs can be modelled with the synchrotron plus synchrotron self-Compton (SSC) emission of the...

83. Results from the SALT e-ROSITA transient followup programme

David A.H. Buckley (SAAO)

13/09/2021, 15:15

Transients

Contributed talk

From mid-2020, the SALT Large Science Program on transients has been following up on some X-ray transients discovered during the eROSITA all-sky survey. These include changing-look AGN, TDEs, Be X-ray and compact white dwarf binaries. I will review the results to date, including the discovery of two new examples of Quasi- Periodic Eruptions (QPEs) in non-active galaxies, the first time such...