GRB241030B: GRANDMA/TAROT Upper Limit

We observed the field of GRB 241030B, detected by SWIFT (GCN 37981) and SVOM/ECLAIRs (GCN 37984), using TAROT, TCA at Calern and TRE at La Réunion observatories. Observations began 1 minute after T0 for TCA and 10 minutes after the trigger for TRE and both without a filter. No afterglow candidate was detected the first min with an upper limit of 16.2 mag in r (5 sigma) and the first 15 min with an upper limit of 17.4 in r (5 sigma). It is consistent with Nanshan/HMT detection (GCN 37985), SAO RAS detection (GCN 37987) and AKO (GCN37986). All the data have been reduced by a single data processing pipeline, STDPipe (Karpov et al., 2022). 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 497, 5518). Kilonova-Catcher (KNC) is the citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).