GCN Circular 31356
Subject
GRB 220101A: THO optical observations
Date
2022-01-01T21:29:30Z (2 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen, Markku Nissinen and Esa Heikkinen (Taurus Hill
Observatory, Varkaus, Finland) report:
We have detected GRB 220101A optical afterglow at Taurus Hill
Observatory (A95) using Meade 16" ACF 0.40-m/f8.0 telescope
and ASI2600MM Pro CMOS camera. We used Chroma Bessell
photometric VRI filters. The observations were started at 2022-01-01
14:40 (UT).
The optical afterglow was detected at the position RA 00:05:24.8
and DEC +31:46:09.7.
The following magnitudes were obtained from the observations using
USNO-B1.0 1217-1802 (V=15.29, R=14.70, I=14.74) as a comparison star:
Tmid(h)+T0 Filter Exp. time Mag Mag. Err.
9.733 V 300s >18.7
9.994 I 300s 17.91 0.08
10.168 R 300s 19.26 0.13
10.661 I 3x300s 18.08 0.10
10.835 R 3x300s 19.16 0.13
URL-link to our image:
https://www.kassiopeia.net/wp-content/uploads/2022/01/grb220101a_I2_nega_web.jpg
