TITLE: GCN CIRCULAR NUMBER: 38763 SUBJECT: GRB 250101A: AKO Optical Afterglow Detection DATE: 25/01/01 19:23:00 GMT FROM: Mohammad Odeh at Al Khatim Observatory M44 mshodeh@gmail.com

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.

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