TY - JOUR
T1 - 3HSP J095507.9+355101
T2 - A flaring extreme blazar coincident in space and time with IceCube-200107A
AU - Giommi, P.
AU - Padovani, P.
AU - Oikonomou, F.
AU - Glauch, T.
AU - Paiano, S.
AU - Resconi, E.
N1 - Publisher Copyright:
© ESO 2020.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - 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 multiwavelength investigation, we confirm that the source is a genuine BL Lac. This new detection differs from TXS 0506+056, which is thus far the first source associated with IceCube neutrinos, and is considered a "masquerading"BL Lac. As in the case of TXS 0506+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.
AB - 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 multiwavelength investigation, we confirm that the source is a genuine BL Lac. This new detection differs from TXS 0506+056, which is thus far the first source associated with IceCube neutrinos, and is considered a "masquerading"BL Lac. As in the case of TXS 0506+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.
KW - BL Lacertae objects: general
KW - Galaxies: active
KW - Gamma rays: galaxies
KW - Neutrinos
KW - Radiation mechanisms: non-thermal
UR - http://www.scopus.com/inward/record.url?scp=85089284817&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/202038423
DO - 10.1051/0004-6361/202038423
M3 - Article
AN - SCOPUS:85089284817
SN - 0004-6361
VL - 640
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - L4
ER -