GCN Circular 37990
Subject
EP241021a: Swift-UVOT detection
Date
2024-10-30T23:11:48Z (a month ago)
From
noelklin@umbc.edu
Via
Web form
N. Klingler (UMBC & NASA-GSFC), S. R. Oates (Lancaster Univ.), and R. Eyles-Ferris (Univ. of Leicester) report on behalf of the Swift-UVOT team:
Swift has performed a follow-up observation of EP 241021a, following the optical re-brightening reported by Quirola-Vasquez et al. (GCN 37930).
Swift-UVOT observed the source in the U-band for 4.3 ks, between 2024-10-29 09:32:55 UTC and 2024-10-29 17:19:10 UTC, which corresponds to t0 + 8.18 days and t0 + 8.51 days, respectively. A source is detected at the position of the optical transient (01:55:23.41 +05:56:18.01; Fu et al.; GCN 37840) with (AB) magnitude U = 21.83 +/- 0.23, and a detection significance of 5.2 sigma. No correction has been made for the expected extinction corresponding to E(B-V) of 0.052.
This circular is an official product of the Swift-UVOT team.