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GCN Circular 35237

Subject
GRB 231129A: JinShan optical upper limit
Date
2023-11-30T16:47:03Z (3 months ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Via
email
X. Liu, Z.P. Zhu, J. An, S.Q. Jiang, S.Y. Fu, T.H. Lu, D. Xu (NAOC), S.W Luo, M.M. Yang, Z. K. Feng, L.F. Huo (XJTS) report on behalf of a large collaboration:

We observed the field of GRB 231129A detected by Swift (J.D. Gropp, GCN 35208), INTEGRAL (S.Mereghetti et al., GCN 35209), and GECAM-C (Wen-Long Zhang et al., GCN 35210), using the  100cm C telescope (100C) located at Altay, Xinjiang, China. Observations started at 12:13:36.29 UT on 2023-11-29, i.e., 7.13 hr after the Swift/BAT trigger, and 30*120s frames are obtained in the Sloan-r band.

No credible optical transient is detected in our stacked images within the refined Swift/XRT error region (Burrows et al., GCN 35218), down to a 3-sigma upper limit of r > 21.6 mag, calibrated with nearby PanSTARRS stars and not corrected for Galactic extinction.


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