GRB 231111A: Optical follow-up observations at Terskol, AbAO, Maidanak, Mondy, Assy
Abstract
We observed the field of GRB 231111A (Melandri et al., GCN 34981; Zhang et al, GCN 34990) at with several telescopes, Zeiss-2000 telesope (Terskol), AS-32 (Abastumani), AZT-22 (Maidanak), AZT-33IK (Mondy) and AZT-20 (Assy).The observations started at Terskol on 2023-11-11 17:37:54, i.e. 3.359712 hr since Swift trigger. The optical source is detected only in the stacked image of 12*300 sec from Maidanak Observatory in the R-filter, while in other cases we obtained the upper limits. The results are in consistent with observations previously reported by other teams and us (Melandri et al., GCN 34981; Jiang et al, GCN 34982; Lipunov et al, GCN 34983; Kumar et al, GCN 34984; Sun et al, GCN 34985; Pankov et al, GCN 34994; Ruocco et al, GCN 34997; Wang et al, GCN 35000; Li et al, GCN 35001; Sun et al, GCN 35002; Moretti et al, GCN 35003; Komesh et al, GCN 35004; D'Avanzo et al, GCN 35007; Thoene et al, GCN 35009; Jiang et al, GCN 35012; Sun et al, GCN 35014). Preliminary photome! try is following: Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) Telescope 2023-11-11 17:37:54 0.13998 2*120 R n/d n/d 19.5 Zeiss-2000 2023-11-12 14:47:53 1.02157 86*60 R n/d n/d 20.5 AS-32 2023-11-12 19:25:37 1.21583 12*300 R 21.06 0.08 22.7 AZT-22 2023-11-13 11:14:51 1.87399 50*120 R n/d n/d 20.7 AZT-33IK 2023-11-13 15:09:27 2.07092 200*30 r n/d n/d 23.0 AZT-20 The photometry is based on nearby stars from USNO-B1.0 and PS1 catalogs.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2023
- Bibcode:
- 2023GCN.35189....1P