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The X-ray and Radio Loud Fast Blue Optical Transient AT2020mrf: Implications for an Emerging Class of Engine-Driven Massive Star Explosions
Yuhan Yao, Anna Y. Q. Ho, Pavel Medvedev +9
We present AT2020mrf (SRGe J154754.2443907), an extra-galactic () fast blue optical transient (FBOT) with a rise time of days and a peak luminosit…
Science with the Ultraviolet Explorer (UVEX)
S. R. Kulkarni, Fiona A. Harrison, Brian W. Grefenstette +53
UVEX is a proposed medium class Explorer mission designed to provide crucial missing capabilities that will address objectives central to a broad range of modern astrophysics. The…
The Type Icn SN 2021csp: Implications for the Origins of the Fastest Supernovae and the Fates of Wolf-Rayet Stars
Daniel A. Perley, Jesper Sollerman, Steve Schulze +31
We present observations of SN 2021csp, the second example of a newly-identified type of supernova (Type Icn) hallmarked by strong, narrow, P Cygni carbon features at early times. T…
Luminous Millimeter, Radio, and X-ray Emission from ZTF20acigmel (AT2020xnd)
Anna Y. Q. Ho, Ben Margalit, Michael Bremer +7
Observations of the extragalactic () transient AT2018cow established a new class of energetic explosions shocking a dense medium, which produce luminous emission at milli…
A comprehensive search for the radio counterpart of GW190814 with the Australian Square Kilometre Array Pathfinder
D. Dobie, A. Stewart, K. Hotokezaka +13
We present results from a search for the radio counterpart to the possible neutron star-black hole merger GW190814 with the Australian Square Kilometre Array Pathfinder. We have ca…
AT2018lqh and the nature of the emerging population of day-scale duration optical transients
E. O. Ofek, S. M. Adams, E. Waxman +18
We report on the discovery of AT2018lqh (ZTF18abfzgpl) -- a rapidly-evolving extra-galactic transient in a star-forming host at 242 Mpc. The transient g-band light curve's duration…