GCN Circular 36947
Subject
GRB240529A: VIRT optical transient detection
Date
2024-07-27T17:41:52Z (7 months ago)
From
Priya Gokuldass at ERAU <gokuldap@my.erau.edu>
Via
Web form
K. Smith (UVI), P. Gokuldass (ERAU), N. Orange (OrangeWave Innovative Science, LLC), D. Morris (NASA), T. Lombardi (Eckerd College), K. Noonan (UVI), D. Smith (UVI), R. Querrard (UVI) report:
We observed the field of GRB240529A (Eyles-Ferris et al., GCN 36556; Joshi et al., GCN 36560; Tan et al., GCN 36578; Kozyrev et al., GCN 36583; Svinkin et al., GCN 36584) with the 0.5m Virgin Islands Robotic Telescope (VIRT) at the University of the Virgin Islands' Etelman Observatory on 2024-05-30 starting at 7:10:12 UT (with Tmid as T+ 28.19 hrs). We performed a series of exposures in R filter with a total exposure of 2630s. The weather conditions were partly cloudy during the hours of observation with an average airmass of ~1.36.
We detect the optical transient reported by others (Kumar et al. GCN 36559; Fu et al. GCN 36561; Shilling et al. GCN 36562; Perez-Garcia et al. GCN 36563; Dutton et al. GCN 36568; Mo et al. GCN 36569; Odeh et al. GCNs 36573, 36592; de Ugarte Postigo et al. GCN 36574; Adami et al. GCN 36575; Mohan et al. GCN 36576; Vinko et al. GCN 36577; Lim et al. GCN 36579; Moskvitin et al. GCNs 36582, 36597, 36601 ; Pankov et al. GCN 36585; Ror et al., GCN 36589; Hu et al. GCN 36599; Lipunov et al. GCN 36603). Our data are consistent with the slow decay suggested through earlier reports (Odeh et al. GCN 36573, 36592; Lim et al. GCN 36579; Ror et al. GCN 36589; Moskvitin et al. GCNs 36582, 36597, 36601; Rossi et al. GCN 36655). We report the following magnitude:
T_mid. ||Exposure ||Filter ||Magnitude
T+ 28.19 hrs ||2630s ||R ||19.4 +/- 0.1
The limit is estimated from comparison to nearby PANSTAARS and is not corrected for Galactic extinction. The VIRT is still in the commissioning phase.
We acknowledge financial support from NASA MUREP MIRO awad 80NSSC21M001, NASA EPSCoR award 80NNSC22M0063, and NSF PAARE award 2319415. We also acknowledge the use of STDWeb interface to verify our result.