GCN Circular 38480

A. Sota (IAA-CSIC, Granada), D. Calle, L.A. Flores, A. Lamy and R. Orduz (Valencia International University) and A. J. Castro-Tirado (IAA-CSIC), on behalf of a larger collaboration, report:

Following the detection of EP241206a by the Einstein Probe (Yin et al., GCNC 38457) we triggered the 1.5m telescope at Observatorio de Sierra Nevada (Spain) to follow-up this fast X-ray transient starting on Dec. 8 at 19:58 UT (~ 51.4 h after trigger time). No optical afterglow within the EP/WXT error box is detected in the co-added image (11 x 300 s, R-band filter) down to 22 mag. This is consistent with earlier upper limits reported by MASTER (Lipunov et al. GCNC 38458) and the BOOTES Global Network (Xiong et al. GCNC 38466).