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Evidence of Energy Injection in the Short and Distant GRB 250221A in a High Density Environment
Camila Angulo-Valdez, Rosa L. Becerra, Ramandeep Gill +29
We present the photometric and spectroscopic analysis of the short-duration GRB 250221A ( s), using a data set from the optical facilities COLIBRÍ, the Harlingt…
GRB220831A: a hostless, intermediate Gamma-ray burst with an unusual optical afterglow
James Freeburn, Brendan O'Connor, Jeff Cooke +20
GRB220831A is a gamma-ray burst (GRB) with a duration and spectral peak energy that places it at the interface between the distribution of long-soft and short-hard GRBs. In thi…
A Fast-cadenced Search for Gamma-Ray Burst Orphan Afterglows with the Deeper, Wider, Faster Programme
James Freeburn, Jeff Cooke, Anais Möller +11
The relativistic outflows that produce Long GRBs (LGRBs) can be described by a structured jet model where prompt -ray emission is restricted to a narrow region in the jet's core…
The Gravity Collective: A Comprehensive Analysis of the Electromagnetic Search for the Binary Neutron Star Merger GW190425
D. A. Coulter, C. D. Kilpatrick, D. O. Jones +34
We present an ultraviolet-to-infrared search for the electromagnetic (EM) counterpart to GW190425, the second-ever binary neutron star (BNS) merger discovered by the LIGO-Virgo-KAG…
Target of Opportunity Observations of Gravitational Wave Events with Vera C. Rubin Observatory
Igor Andreoni, Raffaella Margutti, Om Sharan Salafia +52
The discovery of the electromagnetic counterpart to the binary neutron star merger GW170817 has opened the era of gravitational-wave multi-messenger astronomy. Rapid identification…
WFIRST: Enhancing Transient Science and Multi-Messenger Astronomy
Ryan J. Foley, Joshua S. Bloom, S. Bradley Cenko +31
Astrophysical transients have been observed for millennia and have shaped our most basic assumptions about the Universe. In the last century, systematic searches have grown from de…