TITLE:   GCN CIRCULAR
NUMBER:  36855
SUBJECT: GRB240713A: TAROT and GRANDMA  Observations of SVOM/ECLAIRs GRB240713A
DATE:    24/07/13 13:44:11 GMT
FROM:    Patrice Hello at IJCLAB, Orsay <patrice.hello@ijclab.in2p3.fr>

P. Hello (IJCLAB), T. Hussenot-Desenonges (IJCLAB), N. Kochiashvili (AbAO), R. Strausbaugh (EIU), C. Andrade (UMN), S. Antier (OCA), M. Coughlin (UMN), P-A Duverne (APC),  N. Guessoum (AUS), S. Karpov (FZU), T. Pradier (Unistra/IPHC), D. Turpin (CEA-Saclay/Irfu), X.-H. Han (NAOC), A. Klotz (CNRS-OMP-IRAP), M. Boer, S. Gervasoni, C. Limonta, A. De Ugarte-Postigo (OCA), K. Noysena, M. Sun (NARIT) on behalf of the GRANDMA collaboration.

TAROT together with GRANDMA, partner of the SVOM collaboration, performed follow-up in response to the GRB240713A detected by ECLAIRs (GCN36854, Schanne et al.) on 2024-07-13 at 10:23:36 UTC (MJD 60504.43925, 8.5h after T0) with TAROT-TCH followed by TRT-SBO telescopes (observations to be received soon).

TAROT-TCH data have been reduced by a single data processing pipeline STDPIPE (Karpov et al., 2022). We do not find any optical counterpart within the ECLAIRs localization error box (10 arcmin centered on RA, Dec = 352.59, 1.88 (J2000)). We estimated an upper limit of the image at 18.4 in r-band (5 sigma).

Further GRANDMA data on this event will be available at https://skyportal-icare.ijclab.in2p3.fr/public/sources/GRB240713A/version/9906c481cae20d4b32d7be3e4afdb05e.

We thank SVOM for useful communication. We use the Skyportal application (skyportal.io) to monitor our observational campaign.

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 49, 5518).