Multi-Messenger Astrophysics
Instruments and Observations
Neutrino
Basics
Observatories: IceCube, ANTARES, KM3NET
Interactions (CC, NC)
Properties of this neutrino
cc -> muon
129TeV
Followup of Antares showed nothing
High Energy gamma ray
Instruments
Satellites(Fermi-LAT / AGILE)
Observations
Pinning to TXS 0506+056
0.1 grad from best-fitting direction
is blazar BL Lac
redshift measured from a study triggered by this neutrion observation
Elevated gamma emission
automated processing showed flare (usual)
VHE gamma
IACT (HESS / MAGIC / VERITAS )
HAWC
Upper limits on gamma-flux
flux(E>175GeV) < 1e-11 1/cm/s
MAGIC 2: signal 374 +- 62 photons
probability constant flux: <0.0135
Further observations prevented by full moon
HAWC: no signal
upper limits on redshift by attenuation of extragalactic background light
z_upp = 0.6 to 1 depending on EBL model
Radio
VLA / OVRO
gradual increase over 18 months prior
Optical
redshift measure by Gran Telescopio Canarias
X-ray
Satellites
Spectrum fitting gives
Total Spectrum
Interpretations
IceCube archival data -> neutrino in 2014
Coincidence probability
associate \nu with \gamma
chance disfavored at 3\sigma
Science to be extracted
