TITLE:   GCN CIRCULAR
NUMBER:  36008
SUBJECT: Transient EP240315a: J-band observations of AT2024eju with WIRC
DATE:    24/04/01 20:56:49 GMT
FROM:    nearley@caltech.edu

Nicholas Earley (Caltech), Viraj Karambelkar (Caltech), Christoffer Fremling (Caltech), Mansi Kasliwal (Caltech):

We observed the location of the optical transient AT2024eju (Srivastav et al., GCN 35932) associated with the fast X-ray transient EP240315a (Zhang et al., GCN 35931; Chen et al. GCN 35951) in the near-infrared J-band with the Wide-Field Infrared Camera (WIRC, Wilson et al. 2003) on the 200-in Hale Telescope at Palomar Observatory. 

Observations began at UTC 2024-03-20T04:27:45.313, roughly 4 days after detection in the X-ray. The observations consisted of a dithered set of 45 sec exposures for a total of ~30 minutes. 

We detect a faint source at the location of AT2024eju with m_J ~ 22.5 mag (AB).