Subject: GRB260707A
ID Astro-Colibri : AC 2026swh
Date: 2026-07-07T13:48:57
From: Roger Hellot at AITP Observatory, Spaceobs, San-Pedro-Atacama-Chili, roger.hellot.astro@gmail.com
We report follow-up observations of the short GRB 260707A detected by Fermi GBM Team at MSFC/Fermi-GBM (GCN Circular 45096) at 03:25:09 UT on 7 Jul 20 26.
We observed the field around AR18h53m36s DEC-54°43m48s and performed with our Planewave-CDK17 telescope at AITP-Observatory at SPACEOBS San Pedro de Atacama in Chili equipped with a CMOS QHY268M camera.
Our observation started on 2026-07-07 at 08:47:27 UT (about 5.30 hr after the trigger) and we obtained 16x300 s exposures with the SDSS-r filter. After calibration, the median stacked image has been uploaded to STDWeb, the web-based tool for photometry and transient detection in astronomical images, based on STDPipe library and developed by Sergey Karpov (Karpov, S. (2025). STDweb: simple transient detection pipeline for the web. Acta Polytechnica, 65(1), 50-64. and hosted by the Observatoire de Bretagne Sud, 56390 Grand Champ and privately funded by Pierre-Yves Lechapelain.
We measure the following upper limits calibrated against the PanSTARRS DR1 catalog, and not corrected for Galactic extin ction:
At RA 263.40000 DEC-54.73000, at 2026-07-07T09:27:35Z, GRB260707A upperlimit is 19.73 +/- 0.20 (rmag - 0.00 (gmag - rmag) with S/N = 5 .10
Observer: Roger HELLOT, roger.hellot.astro@g mail.com
Observatory: AITP-OBS-SPC (AITP Observatory-San Pedro de Atacama-Chili)
Affiliation: AITP (Alsace Internet Telescope Project)
Position: W96, 068 10 47.98 W, 22 57 12.52 S, 2399m, (Long: -68°.1799944, Lat: -22 °.9534778) Telescope: Planewave CDK17’’, D432mm, F2934mm, F/6.8, on Astelco N TM500 Mount.
Instrument: CMOS Camera QHY268M.
The AITP Observatory is located at SpaceObs in San Pedro. It was installed by the French Alsatian association AITP founded in 2023 by T. Bouman, D. Christen, P. Ditz, R. Hellot, C. Kreider, A. Maetz, P. Lang. It is intended for the pedagogy of scientific observation.