TITLE:   GCN CIRCULAR
NUMBER:  30708
SUBJECT: GRB 210824A: BOOTES-5/JGT optical upper limit
DATE:    21/08/24 21:59:55 GMT
FROM:    Youdong HU at IAA-CSIC  <huyoudong072@hotmail.com>

Y.-D. Hu, T.-R. Sun, E. Fernandez-Garcia, A. J. Castro-Tirado and M.D. Caballero-Garcia (IAA-CSIC), D. Hiriart, W. H. Lee (UNAM), C. J. Perez del Pulgar and I. Carrasco (UMA), I. H. Park (SKKU) on behalf of a larger collaboration, report:

The 60cm BOOTES-5/JGT robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) automatically responded in 54 s to the Swift trigger of GRB 210824A (Page et al., GCNC 30700) , a burst which was also detected by Fermi (Fermi GBM team, GCNC 30699). In the co-added clear image (10 x 10 s), no optical afterglow is detected within the X-ray afterglow position (Page et al., GCNC 30700; Goad et al., GCNC 30702) down to 19.9 mag.

We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for its excellent support.