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GCN Circular 33764

GRB 230510A: Gaoyazi/GOT optical upper limit
2023-05-11T07:17:27Z (a year ago)
Dong Xu at NAOC/CAS <>
S.Q. Jiang, T.H. Lu, S.Y. Fu, X. Liu, D Xu (NAOC), Z.P. Zhu (NAOC, HUST), S.W. Luo, M.M. Yang, Z. K. Feng (GYZO, NAOC) report:

We observed the field of GRB 230510A detected by Swift (Eyles-Ferris et al., GCN 33752) and Fermi(Fermi GBM team, GCN 33751) with the GOT-0.5m telescope located at Gaoyazi, Xinjiang, China. Observations started at 18:48:27 UT on 2023-05-10, i.e., 6.7 hr after the Swift/BAT trigger, 40 x 90 s images were obtained in the Sloan r filter.

No optical source is detected in our stacked image at the enhanced XRT position (Evans et al., GCN 33756), down to a 3-sigma limiting magnitude r > 19.7 (AB) at 7.27 hr post-burst, calibrated with nearby PanSTARRS stars. The upper limit is consistent with our deeper detection at the Nanshan/NEXT (Jiang et al., GCN 33761).

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