TXS 0506+056
Blazar galaxy and source of astrophysical neutrinos / From Wikipedia, the free encyclopedia
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TXS 0506+056 is a very high energy blazar – a quasar with a relativistic jet pointing directly towards Earth – of BL Lac-type.[3] With a redshift of 0.3365 ± 0.0010,[3] it has a luminosity distance of about 1.75 gigaparsecs (5.7 billion light-years).[4] Its approximate location on the sky is off the left shoulder of the constellation Orion.[5] Discovered as a radio source in 1983, the blazar has since been observed across the entire electromagnetic spectrum.
TXS 0506+056 | |
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Observation data (J2000 epoch) | |
Constellation | Orion |
Right ascension | 05h 09m 25.9645434784s[1] |
Declination | +05° 41′ 35.333636817″[1] |
Redshift | 0.3365 ± 0.0010 |
Apparent magnitude (V) | 14.78 |
Apparent magnitude (B) | 14.95 |
Characteristics | |
Type | Blazar of BL Lac-type |
Other designations | |
QSO J0509+0541, EGR J0509+0550, 2MASS J05092597+054135, VSOP J0509+0541 | |
TXS 0506+056 is the first known source of high energy astrophysical neutrinos,[6] identified following the IceCube-170922A neutrino event[7] in an early example of multi-messenger astronomy.[8][9][10][11] The only astronomical sources previously observed by neutrino detectors were the Sun and supernova 1987A, which were detected decades earlier at much lower neutrino energies.[6]