IceCube-220303A: One X-ray counterpart from Swift/XRT follow up observations

The Neil Gehrels Swift Observatory X-ray Telescope (XRT) observed the uncertainty region of the IceCube neutrino event IceCube-220303A (GCN Circ. 31679) on 2022-03-04, between 00:22 and 02:25 UTC. A 10-point tiling observation centered on the neutrino position was taken for a total of 4 ksec. Of the 90% confidence 4.3 sq. degrees uncertainty region, the XRT observations cover roughly 50% of the central area, but the 50% uncertainty region almost completely. One X-ray candidate counterpart was detected at the coordinates of R.A.: 267.715732, Dec.: 10.9488175 (J2000.0), which may be consistent with the source WISEA J175051.31+105645.3 at a redshift of 0.066. The 0.5-10 keV flux of the source is ~5e-13 erg/s/cm^2, but cannot be constrained well due to the short observation. We have requested follow-up observations with NuSTAR. Multiwavelength follow-up observations are encouraged.