GRB 200716C: CrAO, Terskol, Assy-Turgen optical observations
Abstract
We observed GRB 200716C (Fermi GBM team, GCN 28123; Ukwatta et al GCN 28124; Torii et al., GCN 28139; Xue et al., GCN 28145; Frederiks et al., GCN 28147) with ZTSH 2.6m telescope of CrAO observatory, Zeiss-2000 of Terskol observatory, and AZT-20 telescope of Assy-Turgen observatory. The optical afterglow (Ukwatta et al., GCN 28124; Lipunov et al., GCN 28125; Hu et al., GCN 28126; Kumar et al., GCN 28138; Gokuldass et al., GCN 28146; Jelinek et al., GCN 28149) and possible host galaxy (D'Avanzo et al., GCN 28132) is detected in a stacked image. Preliminary photometry of the (afterglow + possible host galaxy) is following Date UT start t-T0 Filter Exp. OT Err. UL Telescope (mid, days) (s) 2020-07-17 19:17:52 0.84735 R 29*60 19.04 0.03 22.0 ZTSh 2020-07-17 19:50:49 0.87023 R 30*60 19.21 0.03 21.9 ZTSh 2020-07-18 18:33:32 1.83323 R 24*120 19.21 0.06 22.1 Zeiss-2000 2020-07-18 19:25:19 1.85253 R 17*60 19.21 0.06 22.1 ZTSh 2020-07-19 17:15:50 2.78066 r' 52*60 19.31 0.03 22.4 AZT-20 The photometry is based for R-calibration on the star USNO-B1.0_id R 1196-0207871 16.18 and nearby SDSS stars for r' calibration SDSS-DR12_id r J130423.13+294053.3 15.970 J130352.15+293733.9 16.592 J130416.16+293906.8 16.914 The above photometry besides of the first observation is consistent with a brightness of possible host in USNO-B1.0 (R2=19.23) and in SDSS DR12 (r'= 19.301 +/- 0.026). We may conclude that we detected afterglow only in the first observation on 0.84735 days after trigger at R=19.04 +/- 0.03.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2020
- Bibcode:
- 2020GCN.28151....1P