GCN Circular 35945
Subject
X-ray transient EP240315a: Kitab observatory optical upper limitns
Date
2024-03-17T16:17:06Z (a month ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
Via
legacy email
N. Pankov (HSE, IKI), A. Schmalz (KIAM), A. Pozanenko (IKI), S. Belkin (IKI), A. Volnova (IKI), A. Novichonok (Petrozavodsk State University, KIAM) report on behalf of IKI GRB FuN:
We observed the field of the optical counterpart of the X-ray transient EP240315a (Einstein Probe, GCN 35931, Zhang et al.; GCN 35932, GCN 35933, Srivastav et al.; GCN 35935, Jiang et al.; GCN 35937, Rau; GCN 35938, Chen et al.; GCN 35944, Leonini et al.) with Kitab-ISON RC-36 telescope starting on 2024-03-16 (UT) 18:00:00 in Clear filter. We do not detect the optical afterglow (Srivastav et al., GCN 35932) at redshift of z = 4.859 (Saccardi et al., GCN 35936). Preliminary photometry of the filed is following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2024-03-16 18:00:00 0.91685 Clear 22*60 n/d n/d 19.2
The photometry is based on the nearby USNO-B1.0 (R2) stars.