GCN 45274: GRB 260802A: LCO optical upper limits

2026-08-02T13:15:26.897Z | rev 0 | event: GRB 260802A

Y.Y. Shi (GXU), C. Wu, L.P. Xin (NAOC), A. Saccardi, D. Turpin (CEA/Irfu), R.C. Chen, W.J. Xie (BA-F), report on behalf of the SVOM mission team:


We observed the field of GRB 260802A (SVOM burst-id sb26080210) detected by SVOM (Feng et al., GCN 45270) with the LCO 1m telescope at McDonald Observatory equipped with the Sinistro instrument.

Our observation started on 2026-08-02 at 10:21:46 UT (about 58.6 min after the trigger) and we obtained 3x200 s exposures in the SDSS r filter.

In the stacked image, we do not detect any new source within the SVOM/ECLAIRs error box. We measure the following upper limit calibrated against the Pan-STARRS DR1 catalog, and not corrected for Galactic extinction:

r > 20.96 AB (5-sigma, mid-time 1.07 hr after the trigger).

This project is funded by the SVOM collaboration.