GCN Circular 44373
Subject
EP260416a: 1.3m DFOT optical observation
Event
Date
2026-04-21T10:02:49Z (2 months ago)
From
pawarpankaj1492@gmail.com
Via
Web form
Pankaj Pawar, Anshika Gupta, Debalina Kar, Dhruv Jain and Kuntal Misra (ARIES) report:
We observed the field of EP260416a (Hu et al., GCN 44307) with the 1.3m Devasthal Fast Optical Telescope (DFOT), located at the Devasthal Observatory of the Aryabhatta Research Institute of observational sciencES (ARIES), India.
The observations began on 2026-04-20 at 15:58:17 UT, approximately ~106 hours after the trigger. We obtained a series of 300s exposures in the R filter. The frames were aligned and stacked to improve the signal-to-noise ratio.
The optical counterpart (Ducoin et al., GCN 44310; Li et al., GCN 44315; Hua et al., GCN 44318; Lee et al., GCN 44319; Zheng et al., GCN 44321; Martin-Carrillo et al., GCN 44328; Li et al., GCN 44334; He et al. GCN 44336; An et al. GCN 44339; Jelinek et al. GCN 44341; Guziy et al., GCN 44351; and Ho et al., GCN 44354) was not detected in the stacked image.
The details of observations and measured upper limit are as follows:
Date (UT) Start Time T_start-T0 (days) Filter Exposure (s) Magnitude (AB)
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2026-04-20 15:58:17 ~4.44 R 300s*13 >22.6
The magnitude is calibrated using Pan-STARRS field stars.