GCN Circular 38763
Subject
GRB 250101A: AKO Optical Afterglow Detection
Date
2025-01-01T19:23:00Z (8 days 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 250101A (Page et al., GCN 38752) using our
0.36m f/7.7 robotic telescope. The observation session began on 01 January
2025 at 15:52 UT and continued until 17:25 UT, with a midpoint at 16:40 UT,
approximately 3.3 hours after the trigger.
The weather conditions during the observation were partly cloudy. We
obtained multiple 180-second exposures using the Ic filter. The optical
afterglow was barely detected at:
R.A. (J2000): 02:28:16.5
Dec. (J2000): +19:11:40.1
Our detection is consistent with the results of (Page et al., GCN 38752; Li
et al., GCN 38753; Mohan et al., GCN 38754; Zhu et al., GCN 38755; Budnev et
al., GCN 38756; Wu et al., GCN 38758).
The following observation was calculated using Atlas catalogue as a
reference:
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ObsTime (mid), Exposure (sec), Filter, Mag
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2025-01-01T16:39:55Z, 25 x 180s (stacked), Ic, 17.8 +/- 0.9
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The magnitude is not corrected for galactic extinction.