GRB 201020B: continued Mondy optical observations
Abstract
We continued observations of the GRB 201020B (Fermi GBM team, GCN 28702; Malacaria et al., GCN 28710; Arimoto et al., GCN 28716; Ursi et al., GCN 28714; Ridnaia et al., GCN 28723) with AZT-33IK telescope of Sayan observatory (Mondy) on Oct. 22, 23. The optical afterglow (Lipunov et al., GCN 28718; Xu et al., GCN 28719; Belkin et al., GCN 28725; Breeveld & Lien, GCN 28743; Vinko et al., GCN 28750; Kumar et al., GCN 28753) with redshift of z= 0.804 (Kann et al., GCN 28765) is detected in our stacked images in R-filter. Preliminary photometry of the optical transient in a combined image is following Date UT start t-T0 Filter Exp. OT Err. UL(3sigma) (mid, days) (s) 2020-10-22 17:35:31 2.02195 R 60*60 20.40 0.05 23.0 2020-10-23 14:33:52 2.89719 R 32*120 20.99 0.26 21.1 The photometry is based on the nearby USNO-B1.0 stars USNO-B1.0_id R2 1670-0037414 16.74 1670-0037586 16.16
- Publication:
-
GRB Coordinates Network
- Pub Date:
- October 2020
- Bibcode:
- 2020GCN.28768....1B