GCN Circular 34193
Subject
IceCube-230707A: No candidates detected by Swift-XRT
Date
2023-07-10T14:17:35Z (10 months ago)
From
P.A. Evans at U. Leicester <pae9@leicester.ac.uk>
P.A. Evans (U. Leicester) and J.A. Kennea (PSU) report,
Swift-XRT carried out 13 observations of the region of IceCube-230707A (Lincetto et al., GCN Circ 34163), from 59 ks to 78 ks after the neutrino trigger; the typical exposure time was 300 s per field.
We detected three uncatalogued X-ray objects, however all of these are classified as “poor” by the source detection algorithm (Evans et al., 2020) and are thus likely spurious. The typical 3-sigma upper limit is 0.05 ct/sec (0.3-10 keV) corresponding to ~2.1 x 10^-12 erg/cm^2/s.
The full results of the automated XRT analysis can be viewed online at: https://www.swift.ac.uk/neutrino/NEUTRINO_FIELD00040/
(Reference: Evans et al., 2020, ApJS, 247, 54)