GCN Circular 45568
Subject
GRB 260914A: LCO optical observation
Event
Date
2026-09-14T20:28:02Z (3 days ago)
From
SVOM_group <svomgroup@bao.ac.cn>
Via
Web form
A. Saccardi (CEA/Irfu), S. J. Yin (GXU), D. Turpin (CEA/Irfu), D. B. Malesani (DAWN/NBI and Radboud), J. T. Palmerio (CEA/Irfu), K. Liu (GXU), Y. Ma (NAOC), report on behalf of the SVOM mission team:
We observed the field of GRB 260914A detected by SVOM/ECLAIRs (Wang et al., GCN 45562) with the LCO 1m telescope at Siding Spring Observatory equipped with the Sinistro instrument.
Our observation started on 2026-09-14 at 15:01:12 UT (about 3.81 hr after the trigger) and we obtained 3x200 s exposures in each of the SDSS r and Pan-STARRS z filters.
The optical counterpart (Akl et al., GCN 45564; Palmerio et al., GCN 45565; Li et al., GCN 45566; Shi et al., GCN 45567) is detected only in our r-band images. We measure the following magnitudes calibrated against the Pan-STARRS DR1 catalog, and not corrected for Galactic extinction:
r = 20.9 +/- 0.2 AB (mid-time 4.14 hr after the trigger).
Note that the magnitude reported above is not template-subtracted and is contaminated by an underlying object (r ~ 22.1) visible in the Legacy survey, and by the presence of the large nearby galaxy LEDA 1860670 (whose relationship with the GRB is unclear at the moment).
This project is funded by the SVOM collaboration.