TITLE:   GCN CIRCULAR
NUMBER:  38383
SUBJECT: GRB 241128A: Mondy optical observations
DATE:    24/11/29 16:03:19 GMT
FROM:    XXXX at IKI <alex@cgrsmx.iki.rssi.ru>

N. Pankov (HSE, IKI),  A. Pozanenko (IKI), E. Klunko (ISTP),  A. Volnova (IKI) report on behalf of GRB IKI FuN:

We observed  the field of GRB 241128A (Brivio et al., GCN 38367; Page, GCN 38368)  with AZT-33IK telescope of Mondy observatory  in  R-filter on 2024-11-29 starting (UT) 10:48:37. We detect the afterglow (Hu et al., GCN 38371; Izzo and Malesani, GCN 38372;  Gompertz et al., GCN 38373; Akl  et al., GCN 38382). 

Preliminary photometry  of the afterglow is the following

Date       UT start  t-T0     Exp.   Filter OT     Err.  UL(3sigma)
                   (mid, days)  (s)
2024-11-29 10:48:37  0.79796  15x120 R      19.80  0.10  22.9

The photometry is based on nearby USNO-B1.0 R2 stars. 

