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GCN Circular 37060

Subject

GRB 240805B: NUTTelA-TAO / BSTI Optical Limits

Date

2024-08-06T06:07:28Z (3 months ago)

Edited On

2024-08-06T15:13:50Z (3 months ago)

From

Zhanat Maksut at Nazarbayev University <zhanat.maksut@nu.edu.kz>

Edited By

Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Zhanat Maksut at Nazarbayev University <zhanat.maksut@nu.edu.kz>

Via

Web form

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, 1 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, 1 h after the BAT trigger. Observations were made in clear conditions. No source consistent with the XRT (Goad et al., GCN 37053Not found
 
 
) was detected. We report the following results:

start time  t-t0(h)  end time    UL g'   UL r'   exposure_time (s)
-----------------------------------------------------------------------
15:29:10     1     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.

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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.