TITLE: GCN CIRCULAR NUMBER: 37305 SUBJECT: GRB 240824B: Ondrejov D50 optical limit DATE: 24/08/26 21:44:19 GMT FROM: Martin Jelinek at Astro.Inst-AVCR,Ondrejov martin.jelinek@asu.cas.cz
Martin Jelinek, Jan Strobl, Alzbeta Malenakova, Rene Hudec and Cyril Polasek (ASU CAS Ondrejov, CZ), report:
We observed the Swift-XRT localization (Kennea et al. GCN 37270) of the Fermi/GBM (Fermi GBM Team GCN 37260, Sharma et al. GCN 37284), MAXI/GSC (Nakajima et al. GCN 37261) and Swift/BAT (DeLaunay et al. GCN 37267) detected GRB 240824A with the 50 cm robotic telescope (D50) of Ondrejov observatory in Czech republic.
We obtained a set of 120 s Sloan-i' band exposures starting at 00:10 UT, i.e. 10.985 h after the initial trigger. Consistently with Malesani et al. (GCN 37281) and Zheng et al (GCN 37286), we do not detect any emission in or near the Swift-XRT error box. The magnitude limit of our 2.15 h summed integration with a mean time T-T0 12.067 h post burst is i' > 21.3 (AB).
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