TITLE:   GCN CIRCULAR
NUMBER:  38597
SUBJECT: GRB 241217A: GRANDMA/TAROT optical upperlimits
DATE:    24/12/17 21:12:07 GMT
FROM:    Thomas Hussenot-Desenonges at IJCLab <thomas.hussenot@ijclab.in2p3.fr>

T. Hussenot-Desenonges (IJCLAB), L. De Almeida, W. Corradi, N. Sasaki, F. Navarete (LNA), H. Peng (THU), H. Lau Jun Xian (Tsinghua Univ.), A. Klotz (IRAP), S. Antier (OCA), C. Andrade (UMN), S. Karpov (FZU), I. Tosta e Melo (UniCT-DFA), P. Hello (IJCLAB), P-A Duverne (APC), T. Pradier (Unistra/IPHC), N. Guessoum (AUS), on behalf of the GRANDMA collaboration:

We observed the field of GRB 241217A, detected by SVOM/ECLAIRs (GCN 38594) using TAROT/TRE. Observations (unfiltered) began at 2024-12-17T17:22:00UTC, 19 min after T0 and continued up to 45 min after T0.

We did not detect any optical afterglow candidate in our stacked images within a 5-sigma upper limit of r > 18.1 (AB magnitude, calibrated with PanSTARRS).

All the data have been reduced by a single data processing pipeline, STDPipe (Karpov et al., 2022). 

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).