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Ready for O4 II: GRANDMA Observations of Swift GRBs during eight-weeks of Spring 2022
I. Tosta e Melo, J. -G. Ducoin, Z. Vidadi +106
We present a campaign designed to train the GRANDMA network and its infrastructure to follow up on transient alerts and detect their early afterglows. In preparation for O4 II camp…
Multi-wavelength study of the luminous GRB 210619B observed with Fermi and ASIM
M. D. Caballero-García, Rahul Gupta, S. B. Pandey +28
We report on detailed multi-wavelength observations and analysis of the very bright and long GRB 210619B, detected by the Atmosphere-Space Interactions Monitor (ASIM) installed on…
A Peculiarly Short-duration Gamma-Ray Burst from Massive Star Core Collapse
B. -B. Zhang, Z. -K. Liu, Z. -K. Peng +17
Gamma-ray bursts (GRBs) have been phenomenologically classified into long and short populations based on the observed bimodal distribution of duration. Multi-wavelength and multi-m…
The Afterglow of GRB 130427A from 1 to 10^16 GHz
D. A. Perley, S. B. Cenko, A. Corsi +31
We present multiwavelength observations of the afterglow of GRB 130427A, the brightest (in total fluence) gamma-ray burst of the past 29 years. Optical spectroscopy from Gemini-Nor…
Origin of the X-rays and Possible GeV-TeV Emission from the Western Hot Spot Of Pictor A
Jin Zhang, J. M. Bai, Liang Chen +1
Pictor A is a nearby Fanaroff-Riley class II (FR II) radio galaxy with a bright hot spot, the western hot spot. Observation of high polarization in the optical emission of the hot…