IceCube-190730A an astrophysical neutrino candidate in spatial coincidence with FSRQ PKS 1502+106
ATel #12967; Ignacio Taboada (Georgia Institute of Technology), Robert Stein (DESY Zeuthen)
on 30 Jul 2019; 23:58 UT
Credential Certification: Ignacio Taboada (itaboada@gatech.edu)
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
On 2019/07/30.86853 UT IceCube detected a high-energy astrophysical neutrino candidate (Stein, R. et al., GCN Circ. 25225). The neutrino was selected by the ICECUBE_Astrotrack_Gold alert stream. The threshold astrophysical neutrino purity for Gold alerts is 50%. This alert has an estimated false alarm rate of 0.68 events per year due to atmospheric backgrounds. The IceCube detector was in a normal operating state at the time of detection. The best fit information for this event is:
Date/Time: 2019/07/30.86853 UT
RA: 225.79 (+1.28 -1.43 deg 90% containment) J2000
Dec: +10.47 (+1.14 -0.89 deg 90% containment) J2000
The Fermi-LAT catalogue source 4FGL J1504.4+1029, associated with the active galaxy PKS 1502+106, is located within the 50% uncertainty region of the event with an offset of 0.31 degrees from the best-fit neutrino location. PKS 1502+106 is an FSRQ at a redshift of 1.84 also listed in the 3FHL catalog of hard Fermi-LAT gamma-ray sources.
Given the spatial coincidence with this FSRQ, and the high astrophysical neutrino signalness (approximately 67%), we strongly encourage follow-up observations of the neutrino region of interest and of the FSRQ in particular.
The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu
