GCN Circular 31984
Subject
GRB 220501A: GRANDMA/TJML Optical Observations
Date
2022-05-01T22:56:07Z (2 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
A. Klotz (CNRS-OMP-IRAP), A. de Ugarte Postigo, S. Antier (both
CNRS-OCA-ARTEMIS), D. Dornic (CPPM), A. Sabahaddin (ShaO),T. Midavaine
(KNC), V. Rupchandani (AUS), P. A. Duverne (IJCLAB), Y. Rajabov (UBAI),
X. Song (BJP), X. F. Wang (THU/BJP), J. Zhu (BJP), L. Wang, X. Zeng, A.
Iskandar (XAO), and D. A. Kann (IAA-CSIC) report on behalf of the
GRANDMA collaboration:
We observed the BAT error circle of GRB 220501A (D'Ai et al., GCN 31982;
Fermi GBM Team, GCN 31983) with the TJML 11" Celestron telescope
installed at Guitalens observatory. We recorded a stack of 8 x 60 s
unfiltered images in the range from 28.8 to 38.9 minutes after the
trigger.
We did not detect any optical counterpart of GRB 220501A in the BAT
error circle to a limiting magnitude r(AB) > 16.0 mag. Photometry was
calibrated against the Pan-STARRS catalog.
GRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr)
devoted to the observation of transients in the context of
multi-messenger astrophysics (Antier et al. 2020 MNRAS 497, 5518).
Kilonova-Catcher (KNC) is the citizen science program of GRANDMA
(http://kilonovacatcher.in2p3.fr/).