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GCN Circular 32863

GRB 221024A: Mondy optical observations
2022-10-27T12:17:13Z (2 years ago)
Alexei Pozanenko at IKI, Moscow <>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), N. Pankov (HSE) report on behalf of IKI-GRB-FuN:
We observed the field of GRB 221024A (Swift: Brivio et al., GCN 32827; Fermi: J. Wood et al. GCN 32835 ) with AZT-33IK telescope of Mondy observatory  starting on Oct. 26 (UT) 21:03:08. In the stacked image we detected the optical counterpart (Strobl et al., GCN 32838, Swain et al., GCN 32841, Andrade et al., GCN 32859) in coordinates (J2000) 11:18:57.58,  +33:02:32.1 with uncertainities of 0.14 arcsec in both coordinates. The position of the optical counterpart is 2.3" apart from the center and within of the enhanced XRT position (Osborne et al., GCN 32839). Preliminary photometry of the field is following.
Date       UT start t-T0 Filter Exp. OT Err. UL(3sigma)
                    (mid, days) (s)
2022-10-26 21:03:08 2.35534 R 29*120 21.0 0.1 22.5
Photometry is based on the USNO-B2.0 nearby stars.
11:18:51.3907200 +32:59:13.401600 16.52
11:19:04.3800000 +32:58:07.082400 17.00
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