GCN Circular 43775
Subject
EP260214b: Mondy optical observations
Event
Date
2026-02-17T17:29:43Z (7 months ago)
From
Alina Volnova at IKI RAS <alinusss@gmail.com>
Via
Web form
A. Volnova (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), N. Pankov (IKI) report on behalf of IKI-GRB-FuN:
We observed the field of the fast X-ray transient EP260214b (Yang et al., GCNs 43744, 43760) with the AZT-33IK 1.5m telescope of the Mondy observatory starting on 2026-02-16 (UT) 19:44:56 and taking several 120-seconds frames in the R band. The optical counterpart (He et al., GCN 43745; Watson et al., GCN 43747; Pérez-Fournon et al., GCN 43750; Russeil et al., GCN 43752; Li et al., GCN 43755; Vijaykumar et al., GCN 43757; Becerra et al., GCN 43758; Aryan et al., GCN 43762; Bochenek & Perley, GCN 43764; Kar et al., GCN 43774) at a redshift z = 1.208 (Le Floch et al., GCN 43749) is detected in the stacked frame.
Preliminary photometry and observational details are the following:
Date UT start t-T0 Exp. Filter Obj. Err. UL Site/Telescope
(mid,days) (n*s) (3sigma)
2026-02-16 19:44:56 1.93455 45*120 R 21.67 0.16 23.0 Mondy/AZT-33IK
The photometry is based on nearby SDSS stars (R-magnitudes obtained using the 2005 Lupton transformation equations) and is not corrected for Galactic extinction.