GCN Circular 40968
Subject
GRB 250702F: Monte Agliale Observatory optical observations
Event
Date
2025-07-05T06:56:14Z (10 days ago)
From
Fabrizio Ciabattari at Monte Agliale Observatory <fabciaba@alice.it>
Via
Web form
F. Ciabattari, S. Donati, G. Fornaciari, S. Guidotti, E. Mazzoni, M. Rossi, R. Simonetti, R. Bernacchi, F. Biagini, R. Gemignani, M. Giovannini and G. Petroni (Monte Agliale Observatory, Borgo a Mozzano, Italy) report:
We observed the field of GRB 250702F (Klingler et al. GCN 40894) with the automatic 0.5m f/4.6 Newtonian telescope + SBIG ST10 camera at Monte Agliale Observatory (Borgo a Mozzano, Italy, MPC code 159).
The observations started at 2025-07-02 21:08:57.6 UT (135 seconds after the burst) and were automatically triggered by notices received via the kafka platform.
A series of 15 unfiltered images of 30 seconds each was taken and we detect the optical counterpart reported by Klingler et al. (GCN Circ. 40894) and many other observers. As described by Jelinek et al. (GCN Circ. 40895) the light curve peaked at unfiltered magnitude ~15 and showed a slow decay in the following minutes with a decrease of approximately 0.5 mag in 6 minutes.
A Differential Photometric Analysis of this GRB is available at:
https://www.oama.it/archivio/GRB250702F/grb_250702f.htm