GRB 220117A: Terskol and AbAO optical upper limits
Abstract
We observed the field of GRB 220117A (Melandri et al., GCN 31466) also detected by Fermi GBM Sub-Threshold (Veres, GCN 31487), and Konus-Wind (Frederiks et al. GCN 31511) with Zeiss-2000, Zeiss-600 and K-800 telescopes of Terskol observatory and with AS-32 telescope of Abastumani observatory. Within the enhanced XRT Swift-XRT error circle (Beardmore et al., GCN 31472) we did not find any optical source. In particular we do not find the afterglow reported by Nanshan/NEXT (Fu et al., GCN 31467), VLT (Palmerio et al., GCN 31480), LCO (Strausbaugh et al., GCN 31481). Preliminary upper limits are following Date UT start t-T0 Filter Exp. OT Err UL(3sigma) Telescope 2022-01-17 18:32:01 0.12671 R 90*60 n/d n/d 19.3 Zeiss-600 2022-01-17 19:41:36 0.16134 R 19*180 n/d n/d 20.5 Zeiss-2000 2022-01-17 20:53:30 0.20545 R 35*60 n/d n/d 19.4 AS-32 The photometry is based on the nearby PS1 stars.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- January 2022
- Bibcode:
- 2022GCN.31520....1V