TITLE: GCN CIRCULAR NUMBER: 36582 SUBJECT: GRB 240529A: SAO RAS optical observations DATE: 24/05/31 19:24:45 GMT FROM: Moskvitin Alexander at SAO RAS mosk@sao.ru

A. S. Moskvitin, O. I. Spiridonova and V. V. Vlasyuk (SAO RAS), report on behalf of the GRB follow-up team.

We observed the field of the GRB 240529A (Eyles-Ferris et al. GCN 36556; Osborne et al. GCN 36557; Joshi et al. GCN 36560; Dichiara et al. GCN 36564; Markwardt et al. GCN 36566; Tan et al. GCN 36578) with the SAO RAS 1m telescope Zeiss-1000 equipped with CCD-photometer. We obtained 4 x 300 sec frames in Rc band on May 30, 23:35:04--23:56:50 UT (t_mid - T0 = 1.8663 days).

The OT (Kumar et al. GCN 36559; Fu et al. GCN 36561; Shilling et al. GCN 36562; Perez-Garcia et al. GCN 36563; Dutton et al. GCN 36568; Mo et al. GCN 36569; Odeh et al. GCN 36573; de Ugarte Postigo et al. GCN 36574; Adami et al. GCN 36575; Mohan et al. GCN 36576; Vinko et al., GCN 36577; Lim et al. GCN 36579) is clearly detected in the stacked frame with the brightness of R = 20.02 +/- 0.10.

The magnitudes were calibrated using R2 magnitudes of nearby USNO-B1.0 stars.

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