GCN Circular 40295
Subject
GRB 250430A: AKO Optical Afterglow Detection
Event
Date
2025-04-30T19:20:09Z (2 months 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 250430A detected by Swift/BAT (Parsotan et al.,
GCN 40292), using our 0.36m f/7.7 robotic telescope. The observation session
began on 30 April 2025 at 17:52 UT, 21 minutes after the trigger.
We obtained multiple 180-second exposures using the Ic filter. An
uncatalogued object is faintly visible at the location below, which could be
the optical afterglow:
R.A. (J2000): 15:33:32.95
Dec. (J2000): -18:07:05.9
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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2025-04-30T18:29:42Z, 15 x 180s (stacked), Ic, 18.6 +/- 0.22
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The magnitude is not corrected for galactic extinction.