GCN Circular 38109
Subject
EP241101a: CrAO ZTSH optical observations
Date
2024-11-07T03:48:50Z (2 months ago)
From
Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>
Via
legacy email
N. Pankov (HSE, IKI), A. Pozanenko (IKI), V. Rumyantsev (CrAO) report on
behalf of GRB-IKI-FuN collaboration:
We observed the EP241101a detected by EP-WXT (Liang et al., GCN 38039) with
the 2.6-meter ZTSh telescope of CrAO in the R-filter. The observations
were carried out on 02.11.2024 and 03.11.2024. We found several OT
candidates entire the EP-WXT localization area. In particular the source
(PS1 catalog PSO J037.7952+22.7485) reported by Busmann et al., GCN 38064
and the source reported by Adami et al., GCN 38060 were also marked as
candidates in our preliminary analysis. And we do not find any sources
within the enhanced localization area of EP-FXT (Wu et al., GCN 38073).
Preliminary photometry of the sources and upper limits are the following:
Date UT start TO+ Exp. Filter GCN#38064 GCN#38064 UL(3)
(mid, days) (s) OT OT
2024-11-02 23:59:22 1.03548 46x120 R 19.98+-0.05 n/d 21.0
2024-11-03 21:18:54 1.91711 36x120 R 20.47+-0.02 21.88+-0.04 22.0
Photometry is calibrated using nearby USNO-B1.0 stars (R2 magnitude).
Based on our observations and previously reported candidates, we cannot
suggest an obvious candidate for OT EP341101a.