TITLE:   GCN CIRCULAR
NUMBER:  45474
SUBJECT: EP260727a: ATCA 10 GHz detection
DATE:    26/08/31 14:44:51 GMT
FROM:    Giulia Gianfagna at INAF-IAPS <giulia.gianfagna@inaf.it>

G. Bruni, A. L. Thakur, M. Fanelli., G. Gianfagna, L. Piro (INAF-IAPS) report:

We observed the Fast X-ray Transient EP260727a (Hu et al., GCN 45235; Wu et al., GCN 45244) with the Australian Telescope Compact Array (ATCA). Observations were performed on August 28 2026 (at a mean epoch of 31.76 days after the EP trigger) for a total of 6.5 hours at 4 cm under program C3638 (PI Gianfagna). 

Data were reduced and imaged with standard CASA procedures. The final 10 GHz image has an rms of ~8 uJy/beam. 

We detect radio emission at a flux density of ~0.1 mJy at a position consistent with the optical counterpart (He et al., GCN 45234; Maksut et al., GCN 45238; Eyles-Ferris et al., GCN 45239; Adami et al., GCN 45243; Guziy et al., GCN 45245; Moskvitin et al., GCN 45252; Schneider et al., GCN 45256). 

Further ATCA observations are planned.

The Australia Telescope Compact Array is part of the Australia Telescope National Facility (grid.421683.a), which is funded by the Australian Government for operation as a National Facility managed by CSIRO.  We acknowledge the Gomeroi people as the traditional owners of the Observatory site.