TITLE: GCN CIRCULAR NUMBER: 35937 SUBJECT: X-ray transient EP240315a: GROND J-band detection DATE: 24/03/17 07:54:44 GMT FROM: Arne Rau at MPE <arau@mpe.mpg.de> Arne Rau (MPE): The location of the optical transient AT2024eju (Srivastav et al., GCN35932), discovered within the error circle of the fast X-ray transient EP240315a reported by Einstein Probe n (Zhang et al., GCN 35931), was observed with the optical/NIR imager GROND (Greiner et al. 2008) at the MPG 2.2m telescope at the ESO La Silla Observatory on 2024 March 17th 02:50:23 UT (MJD 60386.118). With an exposure of 1200s, the source is detected in the J-band at m_vega=19.6+/-0.2 (m_AB=20.5+/-0.2). We thank the 2.2m staff member, Paul Eigenthaler, for the rapid execution of the observation. View this GCN Circular online at https://gcn.nasa.gov/circulars/35937. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...