TITLE:   GCN CIRCULAR
NUMBER:  31669
SUBJECT: GRB 220302A: BOOTES-5/JGT optical upper limit
DATE:    22/03/03 17:13:47 GMT
FROM:    Youdong HU at IAA-CSIC  <huyoudong072@hotmail.com>

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

Following the detection of GRB 220302A by Swift (Troja et al. GCNC 31661), the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) automatically started to observe the GRB localization starting on Mar 2 at 12:59 UT (~5.3 hours after trigger). In the co-added image (5 x 60 s exposures in the clear filter), no optical afterglow is detected within the Swift/XRT error region (Troja et al. GCNC 31664, Osborne et al. GCNC 31666) down to 20.3 mag. This non-detection is consistent with the UVOT (Troja et al. GCNC 31664) and MASTER observation (Lipunov et al. GCNC 31662).

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