TITLE:   GCN CIRCULAR
NUMBER:  45008
SUBJECT: GRB 260619A: TRT optical counterpart confirmation
DATE:    26/06/19 16:30:48 GMT
FROM:    L. B. He at NAOC <helb@bao.ac.cn>

L.B. He (NAOC), K. Noysena, K. Chanchaiworawit, S. Tinyanont (NARIT), S.Y. Fu (HUST), J. An, X. Liu, Z.P. Zhu, S.Q. Jiang, D. Xu (NAOC) report:

We observed the field of GRB 260619A detected by SVOM/ECLAIRs (Goto et al., GCN 44985) using the 0.7-m telescope of the Thai Robotic Telescope network (TRT), located at Cerro Tololo Inter-American Observatory, Chile (CTO).

The previously reported optical counterpart (Ducoin et al., GCN 44999; Li et al., GCN 45003) is detected in our stacked images with a brightness of r~21.4 at a median time of 3.95 hrs post-trigger, calibrated with Pan-STARRS DR2 stars in the field and not corrected for Galactic extinction.