GCN Circular 34408
Subject
GRB 230812B: Montarrenti Observatory optical observations
Date
2023-08-14T00:58:33Z (a year ago)
From
Simone Leonini at Montarrenti Observatory (Siena, Italy) <s.leonini@iol.it>
Via
Web form
S. Leonini, M. Conti, P. Rosi, L.M. Tinjaca Ramirez (Montarrenti Observatory, Siena, Italy) report:
We observed the field of GRB 230812B (Lesage et al., GCN 34387; Scotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong et al., GCN 34401; Casentini et al., GCN 34002; Frederiks et al., GCN 34403; Mao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin et al., GCN 34406) with the automatic 0.53m Ritchey-Chretien telescope at Montarrenti Observatory (Siena, Italy, IAU code C88).
The observations were started under good weather conditions at 2023-08-13 19:20:53 UT (approximately 24 hours after burst) stacking 50x30s R and I-band CCD images.
The OT was clearly detected at the following position:
RA (J2000.0) 16h 36m 31.47s +/-0.11
Decl. (J2000.0) +47° 51' 32.7" +/-0.14
Preliminary photometry is obtained using nearby PanSTARRS stars as follows:
MJD Filter Mag. Err.
60170.32784 R 20.48 +/-0.07
60170.32827 I 19.78 +/-0.10
Magnitudes are converted using Lupton (2005) equations and are not corrected for galactic dust extinction.