TITLE:   GCN CIRCULAR
NUMBER:  35990
SUBJECT: X-ray transient EP240315a: continued ATCA monitoring
DATE:    24/03/29 11:07:44 GMT
FROM:    Roberto Ricci at INAF-IRA <ricci@ira.inaf.it>

R. Ricci (INAF-IRA), D. Dobie (Swinburne/OzGrav), J. K. Leung (U. Toronto/HUJI), E. Troja (U. Rome)


We report on the results of a follow-up observation of the field of AT2024eju (Srivastav et al., GCN35932), the likely optical counterpart to the fast X-ray transient EP240315a (Zhang et al., GCN35931), with the Australia Telescope Compact Array (ATCA) under project code CX564. The observations were taken  from 2024-03-26 06:20 UT to 2024-03-26 11:24 UT, in a single  run, at 5.5 and 9 GHz. The primary calibrator was 1934-638 and the phase calibrator 0941-080. 


From a preliminary analysis, the radio source reported in our previous GCN  (Leung et al., GCN 35968) continues to be detected at a comparable flux level, ~0.1 mJy. Monitoring with ATCA will continue to assess the variability of the source. 


We thank the CSIRO Space and Astronomy staff, in particular Jamie Stevens, for supporting these observations in a timely manner. We acknowledge the Gomeroi people as the traditional owners of the Observatory site. The Australia Telescope Compact Array is part of the Australia Telescope National Facility (https://ror.org/05qajvd42) which is funded by the Australian Government for operation as a National Facility managed by CSIRO.