{
  "bibcode": "2021GCN.29480....1K",
  "body": "A. Keivani (Columbia U.), J.P. Osborne (U. Leicester), F. Krauss (PSU),\nT. Gregoire (PSU), P.A. Evans (U. Leicester), J.A. Kennea (PSU),\nH. A. Ayala Solares (PSU), D.F. Cowen (PSU), J. DeLaunay (PSU) and D. B. Fox (PSU) report:\n\nSwift observed the field of IceCube 210210A (GCN Circ. 29454) between 14:14:46 on February 10, 2021\nand 00:03:08 on February 11, 2021. Due to a technical problem only two pointings were done with a\nradius of 0.2 degrees each, one centered on the event position and one centered on 4FGL J1342.7+0505.\nA total of 7.5 ks of cleaned photon counting (PC) mode data was collected.\n\nWe found 6 X-ray sources, as detailed below. These sources are either known or unknown but with\ncount rate consistent with the previous non-detections. We therefore do not\nclaim any of them as the likely counterpart to IceCube 210210A.\n\nSource 5 is coincident with the best position of the assumed optical counterpart to 4FGL J1342.7+0505 reported by SIMBAD. Its count-rate in our follow up data is 2.6 (+/-0.3) x 10^-2 ct s^-1. This source has previously been observed by Swift on 2009 August 29 and is in the 2SXPS catalogue (2SXPS J134243.1+050425) with a count-rate of 2.5 (+/-1.1) x 10^-2 ct s^-1. This is consitent with our new measurement.\n\nThe 3-sigma upper limit in the field was in the range 2-3 x 10^-3 ct/sec.\n\nThe detected sources were:\n\nSource no:   1\nRA (J2000):  206.11779 [degrees] = 13h 44m 28.27s\nDec (J2000): +4.8410 [degrees] = +04d 50' 27.7\"\nError:       +2.8 [arcsec, 90% conf. radius]\nCount rate (0.3-10 keV): 1.4 (+0.3, -0.3) x 10^-2 ct s-1\nFlux (0.3-10 keV):       5.8 (+1.2, -1.1) x 10^-13 erg cm-2 s-1\nNote: This is 6\" from the SIMBAD object 1RXS J134428.3+045027\n\nSource no:   2\nRA (J2000):  206.07773 [degrees] = 13h 44m 18.65s\nDec (J2000): +4.7588 [degrees] = +04d 45' 31.5\"\nError:       +4.7 [arcsec, 90% conf. radius]\nCount rate (0.3-10 keV): 3.6 (+1.3, -1.1) x 10^-3 ct s-1\nFlux (0.3-10 keV):       1.5 (+0.6, -0.5) x 10^-13 erg cm-2 s-1\n\nSource no:   3\nRA (J2000):  205.52674 [degrees] = 13h 42m 06.42s\nDec (J2000): +5.0902 [degrees] = +05d 05' 24.6\"\nError:       +3.7 [arcsec, 90% conf. radius]\nCount rate (0.3-10 keV): 2.3 (+/-0.3) x 10^-2 ct s-1\nFlux (0.3-10 keV):       9.7 (+1.4, -1.3) x 10^-13 erg cm-2 s-1\nNote: This is 2.4\" from the SIMBAD object 2E 3124\n\nSource no:   4\nRA (J2000):  205.55271 [degrees] = 13h 42m 12.65s\nDec (J2000): +5.1739 [degrees] = +05d 10' 26.1\"\nError:       +6.1 [arcsec, 90% conf. radius]\nCount rate (0.3-10 keV): 2.3 (+1.3, -1.0) x 10^-3 ct s-1\nFlux (0.3-10 keV):       1.0 (+0.5, -0.4) x 10^-13 erg cm-2 s-1\n\nSource no:   5\nRA (J2000):  205.68170 [degrees] = 13h 42m 43.61s\nDec (J2000): +5.0754 [degrees] = +05d 04' 31.3\"\nError:       +2.5 [arcsec, 90% conf. radius]\nCount rate (0.3-10 keV): 2.6 (+/-0.3) x 10^-2 ct s-1\nFlux (0.3-10 keV):       1.11 (+0.15, -0.14) x 10^-12 erg cm-2 s-1\n\nSource no:   6\nRA (J2000):  205.74168 [degrees] = 13h 42m 58.00s\nDec (J2000): +5.0609 [degrees] = +05d 03' 39.4\"\nError:       +7.6 [arcsec, 90% conf. radius]\nCount rate (0.3-10 keV): 2.8 (+1.3, -1.0) x 10^-3 ct s-1\nFlux (0.3-10 keV):       1.2 (+0.5, -0.4) x 10^-13 erg cm-2 s-1\nNote: This is 2.9\" from the SIMBAD object BD+05 2790.",
  "circularId": 29480,
  "createdOn": 1613061469000,
  "email": "tmg5746@psu.edu",
  "subject": "Swift-XRT observations of IceCube-210210A",
  "submitter": "Timothee Gregoire at Penn State  <tmg5746@psu.edu>",
  "eventId": "IceCube-210210A"
}