Correction to ATel #14199 (Swift XRT observations of the Fermi-LAT source 4FGL J0658.6+0636, positionally consistent with the IceCube high-energy neutrino alert IceCube-201114A)
ATel #14201; S. Buson (Univ. Wuerzburg), M. Santander (Univ. Alabama), S. Garrappa (DESY-Zeuthen), R. Sharpe (Univ. Alabama) and P. Lynch (Univ. Alabama)
on 19 Nov 2020; 22:02 UT
Credential Certification: Marcos Santander (jmsantander@ua.edu)
Subjects: Gamma Ray, >GeV, Neutrinos, Request for Observations, AGN, Blazar
In ATel #14178 there was a mistake in the flux value we reported. We here present the corrected estimates:
Analysing the Neil Gehrels Swift Observatory X-ray Telescope (XRT) data quasi-simultaneous to the IceCube-201114A arrival, we detect 4FGL J0658.6+06361 with an unabsorbed X-ray flux of 1.9 (+2.3, -0.6) x 10^-12 erg cm-2 s-1 (0.3-10 keV) and a photon index of 2.4 +/- 0.7 for an absorbed power law spectrum where the column density is left free (best fit n_H = 5.1 x 10^-21 cm^-2, wilm abundances, vern cross-sections).
This is an elevated state for the source (~26 cts/ks) compared to archival observations from May 2012 when the source was observed at ~10 cts/ks. The flux value from the Swift XRT observations is a factor of ~2.5 lower than that reported by Gokus et al. (ATel #14199) based on eROSITA observations obtained on October 16-17, 2020 in the same energy band.
