TITLE: GCN CIRCULAR NUMBER: 28944 SUBJECT: INTEGRAL Weak #8831 and #8832: AROMA-N Optical Observation DATE: 20/11/23 06:09:55 GMT FROM: Takanori Sakamoto at AGU M. Nakamura, K. Hasuda, T. Sakamoto (AGU) We observed the field of INTEGRAL Weak #8831 and #8832 with the 14-inch AGU Robotic Optical Monitor for Astrophysical object - Narrow (AROMA-N) located at the Sagamihara campus of Aoyama Gakuin University. INTEGRAL Weak #8831: 34 images of 60 sec exposures were taken in the R filter starting from November 21 16:55:08 (UT) about 124 seconds after the trigger and stopped on November 21 17:37:13 (UT). We do not detect an optical afterglow both in the individual images and the stacked image. The estimated five sigma upper limit of the combined image (total exposure of 2040 sec) is ~17.5 mag using the USNO-B1 catalog. INTEGRAL Weak #8832: 59 images of 60 sec exposures were taken in the R filter starting from November 21 17:40:29 (UT) about 166 seconds after the trigger and stopped on November 21 18:53:57 (UT). We do not detect an optical afterglow both in the individual images and the stacked image. The estimated five sigma upper limit of the combined image (total exposure of 3540 sec) is ~17.5 mag using the USNO-B1 catalog.