GCN Circular 30229
Subject
GRB 210610A: SAO RAS optical observations
Event
Date
2021-06-13T13:22:59Z (4 years ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
A. S. Moskvitin and O. A. Maslennikova (SAO RAS),
report on behalf of the GRB follow-up team.
We observed the field of the GRB 210610A (Page et al., GCN #30160)
with the SAO RAS 1-m telescope Zeiss-1000 + CCD-photometer in Rc band
on June 11 and 12.
We clearly detected the GRB OT (Page et al., GCN #30160;
Hosokawa et al., GCNs #30161, #30169; Xu et al., GCN #30162;
Kumar et al., GCN #30163; Zhu et al., GCN # 30164; Lipunov et al.,
GCN #30166; de Wet et al., GCN #30168; Horiuchi et al., GCN #30169;
Sun et al., GCN #30185; Watson et al., GCN #30191; Dutta et al.,
GCN #30200; Zheng et al., GCN #30203, Kann et al., GCN #30211;
Belkin et al., GCN #30214) in the stacked frame obtained
on June 11 and marginally detected the object in the stacked frame
obtained on June 12.
Date UT_start UT_end Exp., s T_mid-T0, d R mag
June, 11 20:12:02--21:08:03 8 x 300 1.23356 22.43 +/- 0.14
June, 12 19:46:09--21:08:36 12 x 300 2.22477 23.3 +/- 0.3
The preliminary photometry is based on magnitudes of the nearby
SDSS stars (transformed with the Lupton 2005 equations).
The OT magnitudes were not corrected for MW extinction.