GCN Circular 44619

T. Mohan (IITB), V. Vijaykumar (IITB), V. Swain (IITB), D. Eappachen (IIA), A.P. Saikia (IITB), S. Patil (IITB), V. Bhalerao (IITB), G.C. Anupama (IIA), S. Barway (IIA) and K. Angail (IAO) report on behalf of the GIT team:

We observed the field of EP260514a (Cheng et al., GCN 44613

), with 0.7m GROWTH-India Telescope (GIT). We started the observation at 2026-05-15 16:27:06 (UTC), i.e., 0.98 days after the trigger, and obtained single exposure in the r' filter. We did not detect any transient in our image within the WXT localization region. The photometric upper limit is as follows:

MJD (mid)	Filter	tmid-t0 (hour)	Exposure Time (sec)	Upper limit (AB)
61175.68756	r'	23.57	360	20.5

The measurement is calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction.

Our results are consistent with other optical observation (Lipunov et al., GCN 44614

).

The GROWTH India Telescope (GIT; Kumar et al. 2022) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.