GCN Circular 40925
Subject
GRB 250702F: AKO Optical Afterglow Detection
Event
Date
2025-07-03T18:36:05Z (10 hours ago)
From
Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>
Via
email
Mohammad Odeh (Al-Khatim Observatory, AKO, operated by the International
Astronomical Center in Abu Dhabi, UAE), and Nidhal Guessoum (American
University of Sharjah, UAE), report:
We observed the field of GRB 250702F detected by Swift/BAT (Klingler et al.,
GCN 40894) and Fermi/GBM (Fermi GBM Team, GCN 40892), using our 0.36m f/7.7
robotic telescope. The observation session began on 03 July 2025 at 17:04
UT, with a midpoint at 17:42 UT, approximately 20.6 hours after the trigger.
We obtained multiple 180-second exposures using the Ic filter. The optical
afterglow was marginally detected at:
R.A. (J2000): 14:11:44.6
Dec. (J2000): +16:44:55
Our detection is consistent with the results of (Jelinek et al., GCN 40895;
Kumar et al., GCN 40896; Lipunov et al., GCN 40899; Martin-Carrillo et al.,
GCN 40900; Angulo et al., GCN 40907; Becerra et al., GCN 40911; Brivio et
al., GCN 40913; An et al., GCN 40916; Dutton et al., GCN 40921).
The following observation was calculated using the Atlas catalogue as a
reference:
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ObsTime (mid), Exposure (sec), Filter, Mag
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2025-07-03T17:42:28Z, 26 x 180s (stacked), Ic, 19.5 +/- 0.4
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The magnitude is not corrected for galactic extinction.