TITLE: GCN CIRCULAR NUMBER: 36888 SUBJECT: EP240708a: X-ray follow-up observations with Swift/XRT DATE: 24/07/16 15:09:38 GMT FROM: Jonathan Quirola <jaquirola1990@gmail.com> J. Quirola-Vásquez (Radboud Univ.), P.G. Jonker (Radboud Univ), J. van Dalen (Radboud Univ.) ,F. E. Bauer (PUC), A.J. Levan (Radboud Univ. & Warwick Univ.), D. B. Malesani (DAWN/NBI and Radboud Univ.), Maria E. Ravasio (Radboud Univ.), D. Mata Sanchez (IAC), M.A.P. Torres (IAC), report on behalf of a larger collaboration: We observed the location of the X-ray counterpart of the fast X-ray transient EP240708a reported by the Einstein Probe WXT instrument and FXT (Chen et al. GCN 36838; Hu et al. GCN 36840) using the Swift-XRT Observatory ToO program (ObsID: 00016707002). The observation started at 2024-07-15T23:58:44 UT and lasted for ~0.5 ksec, using the PC mode. We do not detect an X-ray counterpart to the transient. Using Kraft et al. (1991) this leads to a 90% upper limit on the source count of ~5.3E-3 cnt/s. Using an absorbed power law model with photon index 1.62 and column density 2.0E20 cm-2 following the detected parameters of Hu et al. (GCN 36840), we obtain a flux upper limit of 6.8E-13 erg cm-2 s-1 (0.3-10 keV). We thank the Neil Gehrels Swift Observatory team for making the X-ray observation possible. View this GCN Circular online at https://gcn.nasa.gov/circulars/36888. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...