GCN Circular 34881
Subject
GRB 231024A: LCOGT and ZTF detections of the GOTO optical counterpart candidate
Date
2023-10-25T14:05:57Z (a year ago)
From
ipf@iac.es
Via
Web form
A. Iglesias-López, H. Akoudad-Ekajouan, C. Araujo-Álvarez, C. Arrizabalaga-Díaz-Caneja, F. Barnes-Sánchez, P. Eguiguren-Arrizabalaga, G.A. Jaimes-Illanes, P. Jiménez-Sánchez, S. Lamolda-Mir, A. Mang-Román, G. Marrero-Ramallo, P.P. Meni-Gallardo, I. Ruiz-Cejudo (ULL), M. Sánchez-Andújar (ULL and IAC), V. Wienzek (ULL), E. Esparza-Borges, F. Tinaut-Ruano, and I. Pérez-Fournon (IAC and ULL) report:
We report LCOGT and ZTF detections of GOTO23baj, the GOTO optical counterpart candidate of GRB 231024A.
The likely SHORT GRB 231024A has been reported by the Fermi GBM Team (GCN 34876). Gompertz et al. (GCN 34878) have reported a GOTO optical counterpart candidate, GOTO23baj (AT 2023vuc), at RA (J2000) = 00:55:07.30, Dec (J2000) = -15:15:19.43 and L = 18.37 +/- 0.07 on 2023-10-24 22:15:30.
We triggered Las Cumbres Observatory follow-up imaging and detected a source at the position of GOTO23baj on UT 2023-10-25 07:23:31 at SDSS r' = 18.28 +/- 0.12 in a single 300 sec exposure using one of the Las Cumbres Observatory 40 cm telescopes at Heleakala Observatory (Maui, Hawaii).
This transient has also been detected by ZTF (ZTF23abnevza) on UT 2023-10-25 07:42:27 at ZTF g = 18.193 ± 0.082.
This work makes use of observations from the Las Cumbres Observatory global telescope network (program IAC2023B-001) and is based on observations made with the Las Cumbres Observatory's education network telescopes that were upgraded through generous support from the Gordon and Betty Moore Foundation. These observations are part of a course in Astrophysical Techniques of the Master in Astrophysics of the Astrophysics Department of the University of La Laguna and Instituto de Astrofisica de Canarias (Tenerife, Canary Islands, Spain).