GCN Circular 34077
Subject
ATLAS23msn/ZTF23aaoohpy/AT2023lcr: Zeiss-1000 of Koshka observatory optical observations
Event
Date
2023-06-24T19:39:55Z (2 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI, HSE), I. Sokolov (KIAM), I. Nikolenko (INASAN), A. Pozanenko (IKI), N. Pankov (HSE) report on behalf of GRB IKI FuN:
We observed the field of ATLAS23msn/ZTF23aaoohpy/AT2023lcr (Swain et al., GCN 34022) with Zeiss-1000 telescope of Koshka observatory in R-filter on 2023-06-20 and 2023-06-23. We detect the optical counterpart (Gompertz et al., GCN34023; Kumar et al., GCN34025; Adami et al., GCN 34030; Perley et al, GCN 34031; Jiang et al., GCN 34040; Perley et al., GCN 34041; Fulton et al., 34042; Chen et al., GCN 34043; Belkin et al., GCN 34047; Breeveld, GCN 34049; Leonini et al., GCN 34052; Moskvitin et al., GCN 34060) on 2023-06-20 and obtained an upper limit on 2023-06-23. Preliminary photometry of a stacked images is following
Date UT start MJD Exp. Filter OT Err. UL(3sigma)
(mid exposure) (s)
2023-06-20 19:14:22 60115.83567130 49*120 R 21.31 0.18 22.2
2023-06-23 18:43:28 60118.80657407 38*120 R n/d n/d 21.7
The photometry is based on nearby SDSS-DR12 stars.
SDSS-DR12
RA DEC R(Lupton transformations)
16:31:20.4491016 +26:24:03.644928 18.124
16:31:41.2384008 +26:20:23.267580 17.545
16:31:32.6899656 +26:20:16.058832 18.238
16:31:31.3849992 +26:19:27.712488 18.804