TITLE: GCN CIRCULAR NUMBER: 37060 SUBJECT: GRB 240805B: NUTTelA-TAO / BSTI Optical Limits DATE: 24/08/06 06:07:28 GMT FROM: Zhanat Maksut at Nazarbayev University zhanat.maksut@nu.edu.kz
Z. Maksut (NU), B. Grossan (UCB, NU), T. Komesh (NU), Zh. Abdullayev (NU), M. Krugov (FAI) and E. Abdikamalov (NU) report on behalf of the Energetic Cosmos Laboratory:
The Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (NUTTelA-TAO) observed the field of GRB 240805B, 0.8 h after receipt an automated GCN / BAT position alert, observing in Sloan g' and r' bands, with the Burst Simultaneous Three-Channel Imager (BSTI; Grossan, Kumar & Smoot 2019, JHEA, 32, 14).
We started observations at 15:29:10 UT on 2024-08-05, 0.8 h after the BAT trigger. Observations were made in clear conditions. No source consistent with the XRT (Goad et al., GCN 37053) was detected. We report the following results:
start time t-t0(h) end time UL g' UL r' exposure_time (s) ----------------------------------------------------------------------- 15:29:10 0,81 15:35:19 19.7 19.4 3x120
start time is in UT. t-t0(h) gives the time since trigger, in hours. UL gives the 5 sigma upper limit sensitivity in magnitudes, for images co-added to the given exposure time. Calibration was done with the 4 bright Pan-STARRS catalog stars on our images.
---------------------------------- NU = Nazarbayev University, Astana, Kazakhstan UCB = University of California, Berkeley, USA FAI = Fesenkov Astrophysical Institute, Almaty, Kazakhstan
This research has been funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP14870504). The NUTTelA-TAO Team acknowledges the support of the staff of the Assy-Turgen Astrophysical Observatory, Almaty, Kazakhstan, and the Fesenkov Astrophysical Institute, Almaty, Kazakhstan.
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