GCN Circular 34421

S. Belkin (IKI), I. Nikolenko (INASAN), N. Pankov (HSE, IKI), A. Pozanenko (IKI)  report on behalf of GRB IKI FuN:

We observed the field of GRB 230812B (Fermi GBM Team, GCN 34386
Not found
 
 
; Scotton et al., GCN 34392
Not found
 
 
; Page et al. GCN 34394
Not found
 
 
; Kuin et al., GCN 34399
Not found
 
 
; Casentini et al., GCN 34402
Not found
 
 
) with  Zeiss-1000 telescope of Koshka observatory in R-filter. We  detected the afterglow (e.g. Lesage et al., GCN 34387
Not found
 
 
; Scotton et al., GCN 34392
Not found
 
 
; Page, GCN 34394
Not found
 
 
; Zheng & Filippenko, GCN 34395
Not found
 
 
; Lipunov et al., GCN 34396
Not found
 
 
; Salgundi et al., GCN 34397
Not found
 
 
; Ackley et al., GCN 34398
Not found
 
 
; Xiong et al., GCN 34401
Not found
 
 
; Casentini et al., GCN 34402
Not found
 
 
; Frederiks et al., GCN 34403
Not found
 
 
; Mao et al., GCN 34404
Not found
 
 
; Odeh et al., GCN 34405
Not found
 
 
; Moskvitin et al., GCN 34406
Not found
 
 
; Leonini et al., GCN 34408
Not found
 
 
; de Ugarte Postigo et al., GCNs 24409
Not found
 
 
, 34410
Not found
 
 
; Belkin et al., GCN 34412
Not found
 
 
) in a stacked image. Preliminary photometry of the object is following

Date       UT start   t-T0    Filter Exp.    OT    Err.  UL(3sigma) Telescope
                       (mid, days)    (s)

2023-08-13 18:07:14   0.99724  R    35*120 20.18 0.07    22.0 Zeiss-1000
 
The photometry is based on nearby SDSS stars used in (Moskvitin et al, GCN 34406
Not found
 
 
):
RA DEC R (Lupton transformations)
16:36:35.9365104 +47:52:54.574320 14.893 0.008
16:36:32.6835360 +47:53:44.537784 16.531 0.009
16:36:25.6055880 +47:53:20.456304 16.827 0.009
16:36:25.1691816 +47:52:20.931816 16.068 0.008
16:36:44.6580984 +47:50:56.806944 15.785 0.008
16:36:40.1374488 +47:54:02.128752 15.698 0.008