GRB 210610B: CrAO/ZTSH continued optical observations and light curve
Abstract
We observed the GRB 210610B (Page et al., GCN 30170) with ZTSH 2.6m telescope of CrAO observatory on June 10,11 (Rumyantsev et al., GCNs 30175, 30178; Pankov et al., GCN 30213) and June 12 - 14. The optical afterglow first reported by UVOT (Page et al., GCN 30170) is clearly detected in each epochs. Some preliminary photometry is following. Date UT start t-T0 Filter Exp. OT err UL(3 sigma) (mid, days) (s) 2021-06-12 20:54:55 2.0545 R 2*120 20.80 0.10 22.2 2021-06-12 22:41:00 2.1282 R 2*120 20.89 0.10 22.8 2021-06-14 20:40:19 4.0649 R 25*120 21.90 0.11 23.3 The photometry is based on calibrations stars reported in (Pankov et al., GCN 30213). Based on our observations in ZTSh on June 10-14, AbAO (Pankov et al., GCN 30243) and photometry reported in GCNs we report the light curve of the afterglow which can be found in http://grb.rssi.ru/GRB210610B/GRB210610B_LC.png After plateau phase lasting up to ~ 0.3 days in R-filter, the LC can be approximated by a single power law with index of -1.6.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2021
- Bibcode:
- 2021GCN.30245....1P