3HSP J095507.9+355101: a flaring extreme blazar coincident in space and time with IceCube-200107A

Journal
Date Issued
2020
Author(s)
Giommi, P.
•
Padovani, P.
•
Oikonomou, F.
•
Glauch, T.
•
•
Resconi, E.
DOI
Abstract
The uncertainty region of the highly energetic neutrino IceCube200107A includes 3HSP J095507.9+355101 ($z$~=~0.557), an extreme blazar, which was detected in a high, very hard, and variable X-ray state shortly after the neutrino arrival. Following a detailed multi-wavelength investigation, we confirm that the source is a genuine BL Lac, contrary to TXS 0506+056, the first source so far associated with IceCube neutrinos, which is a "masquerading" BL Lac. As in the case of TXS0506+056, 3HSP J095507.9+355101 is also way off the so-called "blazar sequence". We consider 3HSP J095507.9+355101 a possible counterpart to the IceCube neutrino. Finally, we discuss some theoretical implications in terms of neutrino production.
Volume
640
Start page
L4
Uri
Url
Issn Identifier
0004-6361
Rights
open.access
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