Markarian 421

GPTKB entity

Statements (28)
Predicate Object
gptkbp:instanceOf gptkb:blazar
active galactic nucleus
Markarian galaxy
gptkbp:apparentMagnitude 13.3
gptkbp:catalogue gptkb:PGC_catalogue
gptkb:Roma-BZCAT
Markarian catalogue
UGC catalogue
gptkbp:declination +38° 12′ 32″
gptkbp:discoveredBy gptkb:Benjamin_Markarian
gptkbp:discoveredIn 1971
gptkbp:distanceFromEarth 397 million light-years
gptkbp:hostedBy gptkb:galaxy
https://www.w3.org/2000/01/rdf-schema#label Markarian 421
gptkbp:isGammaRaySource true
gptkbp:isRadioSource true
gptkbp:isXRaySource true
gptkbp:locatedIn constellation Ursa Major
gptkbp:notableFor first extragalactic source detected at TeV gamma-ray energies
gptkbp:otherName BZG J1104+3812
Mrk 421
PGC 37389
UGC 6132
gptkbp:redshift 0.0308
gptkbp:rightAscension 11h 04m 27.3s
gptkbp:spectralType gptkb:BL_Lacertae_object
gptkbp:bfsParent gptkb:Blazar
gptkbp:bfsLayer 6