GCN Circular 31398
Subject
GRB 220101A: Continued Mondy optical observations
Event
Date
2022-01-07T12:25:31Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), A. Pozanenko (IKI), E. Klunko (ISTP), Belkin (IKI, HSE)
report on behalf of GRB IKI FuN:
We observed Swift GRB 220101A (Tohuvavohu, et al., GCN 31347) also
detected by Fermi/LAT (Arimoto et al. 2022, GCN 31350), AGILE (Ursi et
al. 2022, GCN 31354), and Fermi/GBM (Lesage et al. 2022, GCN 31360) with
AZT-33IK telescope of Sayan observatory (Mondy) starting on 2022-01-06
(UT) 13:57:13. We detected the afterglow (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., GCNs 31383, 31389;
Dimple et al., GCN 31384; Romanov, GCN 31387; Caballero-Garcia, GCN
31388; Belkin et al, GCN 31390; Gupta et al, GCN 31394; D'Avanzo et al,
GCN 31395) in a stacked image.
Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2022-01-06 13:57:13 5.38683 R 30*120 22.17 0.18 23.0
The photometry is based on the nearby SDSS-DR12 stars
RA DEC R(Lupton)
00:05:20.64408 +31:45:46.0728 18.562
00:05:34.81464 +31:45:50.5224 15.734
00:05:32.53944 +31:44:51.9396 15.369
00:05:36.69864 +31:44:42.4176 14.677