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- Markarian_421 abstract "Markarian 421 (Mrk 421, Mkn 421) is a blazar located in the constellation Ursa Major. The object is an active galaxy and a BL Lacertae object, and is a strong source of gamma rays. It is about 397 million light-years (redshift: z=0.0308 eq. 122Mpc) to 434 million light-years (133Mpc) from the Earth. It is one of the closest blazars to Earth, making it one of the brightest quasars in the night sky. It is suspected to have a supermassive black hole (SMBH) at its center due to its active nature, and has a companion galaxy (Markarian 421-5) that is fueling the gas jets observed pointing away from the galaxy.It was first determined to be a very high energy gamma ray emitter in 1992 by M. Punch at the Whipple Observatory, and an extremely rapid outburst in very high energy gamma rays (15-minute rise-time) was measured in 1996 by J. Gaidos at Whipple Observatory Markarian 421 also had an outburst in 2001 and is monitored by the Whole Earth Blazar Telescope project.Due to its brightness (around 13.3 magnitude, max. 11.6mag. and min. 16mag.) the object can also be viewed by amateurs in smaller telescopes.".
- Markarian_421 thumbnail Mark421-U3WS2701M.jpg?width=300.
- Markarian_421 wikiPageExternalLink mrk421.html.
- Markarian_421 wikiPageExternalLink Markarian_421.html.
- Markarian_421 wikiPageID "6003864".
- Markarian_421 wikiPageLength "4113".
- Markarian_421 wikiPageOutDegree "30".
- Markarian_421 wikiPageRevisionID "641442819".
- Markarian_421 wikiPageWikiLink Active_galactic_nucleus.
- Markarian_421 wikiPageWikiLink BL_Lac_object.
- Markarian_421 wikiPageWikiLink Blazar.
- Markarian_421 wikiPageWikiLink Category:BL_Lac_objects.
- Markarian_421 wikiPageWikiLink Category:Blazars.
- Markarian_421 wikiPageWikiLink Category:Discoveries_by_Benjamin_Markarian.
- Markarian_421 wikiPageWikiLink Category:Markarian_galaxies.
- Markarian_421 wikiPageWikiLink Category:PGC_objects.
- Markarian_421 wikiPageWikiLink Category:UGC_objects.
- Markarian_421 wikiPageWikiLink Category:Ursa_Major_(constellation).
- Markarian_421 wikiPageWikiLink Companion_galaxy.
- Markarian_421 wikiPageWikiLink Constellation.
- Markarian_421 wikiPageWikiLink Earth.
- Markarian_421 wikiPageWikiLink Epoch_(astronomy).
- Markarian_421 wikiPageWikiLink Gamma_ray.
- Markarian_421 wikiPageWikiLink Light-year.
- Markarian_421 wikiPageWikiLink IPAC_Extragalactic_Database.
- Markarian_421 wikiPageWikiLink Night_sky.
- Markarian_421 wikiPageWikiLink Parsec.
- Markarian_421 wikiPageWikiLink Quasar.
- Markarian_421 wikiPageWikiLink SIMBAD.
- Markarian_421 wikiPageWikiLink Supermassive_black_hole.
- Markarian_421 wikiPageWikiLink Ursa_Major.
- Markarian_421 wikiPageWikiLink Whole_Earth_Blazar_Telescope.
- Markarian_421 wikiPageWikiLink Wide_Field_and_Planetary_Camera_2.
- Markarian_421 wikiPageWikiLink File:Mark421-U3WS2701M.jpg.
- Markarian_421 wikiPageWikiLinkText "421".
- Markarian_421 wikiPageWikiLinkText "Markarian 421".
- Markarian_421 appmagV "11.6".
- Markarian_421 appmagV "12.9".
- Markarian_421 appmagV "13.3".
- Markarian_421 caption "Hubble Legacy Archive WFPC2 image of Mark 421 and its companion galaxy 421-5".
- Markarian_421 constellationName Ursa_Major.
- Markarian_421 distLy "397".
- Markarian_421 epoch Epoch_(astronomy).
- Markarian_421 name "Markarian 421".
- Markarian_421 names "B2 1101+38, UGC 6132, PGC 33452, 2E 2393, QSO B1101+384, Mark 421".
- Markarian_421 type BL_Lac_object.
- Markarian_421 wikiPageUsesTemplate Template:DEC.
- Markarian_421 wikiPageUsesTemplate Template:Galaxy-stub.
- Markarian_421 wikiPageUsesTemplate Template:Quasar.
- Markarian_421 wikiPageUsesTemplate Template:RA.
- Markarian_421 wikiPageUsesTemplate Template:Reflist.
- Markarian_421 wikiPageUsesTemplate Template:Sky.
- Markarian_421 wikiPageUsesTemplate Template:WikiSky.
- Markarian_421 z "0.030021".
- Markarian_421 subject Category:BL_Lac_objects.
- Markarian_421 subject Category:Blazars.
- Markarian_421 subject Category:Discoveries_by_Benjamin_Markarian.
- Markarian_421 subject Category:Markarian_galaxies.
- Markarian_421 subject Category:PGC_objects.
- Markarian_421 subject Category:UGC_objects.
- Markarian_421 subject Category:Ursa_Major_(constellation).
- Markarian_421 hypernym Blazar.
- Markarian_421 type Catalogue.
- Markarian_421 type Object.
- Markarian_421 comment "Markarian 421 (Mrk 421, Mkn 421) is a blazar located in the constellation Ursa Major. The object is an active galaxy and a BL Lacertae object, and is a strong source of gamma rays. It is about 397 million light-years (redshift: z=0.0308 eq. 122Mpc) to 434 million light-years (133Mpc) from the Earth. It is one of the closest blazars to Earth, making it one of the brightest quasars in the night sky.".
- Markarian_421 label "Markarian 421".
- Markarian_421 sameAs Q201968.
- Markarian_421 sameAs Markarjan_421.
- Markarian_421 sameAs Markarian_421.
- Markarian_421 sameAs Markarian_421.
- Markarian_421 sameAs Markarian_421.
- Markarian_421 sameAs Markarian_421.
- Markarian_421 sameAs m.0fk514.
- Markarian_421 sameAs Q201968.
- Markarian_421 wasDerivedFrom Markarian_421?oldid=641442819.
- Markarian_421 depiction Mark421-U3WS2701M.jpg.
- Markarian_421 isPrimaryTopicOf Markarian_421.
