GCN Circular 31389
Subject
GRB 220101A: 3rd LCO Optical Observation
Date
2022-01-05T00:16:11Z (3 years ago)
From
Robert Strausbaugh at U. of the Virgin Islands <robert.strausbaugh@uvi.edu>
R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (College of Marin) report on behalf of a larger collaboration:
We observed Swift GRB 220101A (Tohuvavohu, et al., GCN 31347) for a third time with the LCO 1-m Sinistro instrument at the Teide Observatory, Tenerife site, on January 4, from 21:35 to 22:02 UT (corresponding to 88.43 to 88.88 hours from the GRB trigger time) with the Bessel R and I filters.
We performed a series of 2x500s exposures in R and I bands. We still detect the source at the UVOT detection coordinates and other optical observations (Tohuvavohu et al., GCN 31347; Kuin & Tohuvavohu, GCN 31351; Fu et al., GCN 31353; Hentunen et al., GCN 31356;
Perley et al., GCN 31357; de Ugarte Postigo et al., GCN 31358; Fynbo et al., GCN 31359; Vinko et al., GCN 31361; Tomasella et al., GCN 31363; Mao et al., GCN 31364; Noschese et al., GCN 31366; Mao et al., GCN 31368; Guelbenzu, et al., GCN 31370; Strausbaugh et al., GCN 31371, D'Avanzo et al., GCN 31373; Strausbaugh et al., GCN 31383; Dimple et al., GCN 31384; Romanov, GCN 31387; Caballero-Garcia, GCN 31388) in both bands. The following magnitudes are calculated using the USNO-B.1 catalog as reference:
R=21.31+/-0.18
I=20.43+/-0.12
These magnitudes are not corrected for galactic extinction.
R.S. is funded by NSF AST grant #1831682