Markarian 421
Coordinates: 
11h 04m 27s, +38° 12′ 32″
11h 04m 27s, +38° 12′ 32″| Markarian 421 | |
|---|---|
| Apparent magnitude (V) | 12.9 (SIMBAD)[1] 13.3 (NED)[2] 11.6-16 (B Band)[4] |
| Other designations | |
| B2 1101+38, UGC 6132, PGC 33452, 2E 2393, QSO B1101+384, Mark 421[1] | |
| See also: Quasar, List of quasars | |
Markarian 421 (Mrk 421, Mkn 421) is a
quasars in the night sky. It is suspected to have a supermassive black hole
(SMBH) at its center due to its active nature. An early-type high inclination spiral galaxy (Markarian 421-5) is located 14 arc-seconds northeast of Markarian 421.
It was first determined to be a very high energy gamma ray emitter in 1992 by M. Punch at the
Whipple Observatory,[5] 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.[6]
Markarian 421 also had an outburst in 2001 and is monitored by the Whole Earth Blazar Telescope project.[7]
Due to its brightness (around 13.3 magnitude, max. 11.6 mag. and min. 16 mag.) the object can also be viewed by amateurs in smaller telescopes.
References
- ^ a b c d e f "Mrk 421". SIMBAD Astronomical Database. Retrieved 2010-04-12.
- ^ a b c d e "NASA/IPAC Extragalactic Database". Results for MRK 0421. Retrieved 2010-04-12.
- ^ a b "Distance Results for MRK 0421". NASA/IPAC Extragalactic Database. Retrieved 2010-04-13.
- ^ "Variable Star Of The Season AAVSO. Winter 2004: Markarian 421". AAVSO. December 28, 2007. Retrieved 2010-01-10.
- S2CID 4349393.
- S2CID 4327435.
- Bibcode:2001ICRC....7.2699S.
External links
- Markarian 421 on
- Focus on Markarian 421
- Gokus, Andrea; et al. (2021). "Multi-wavelength study of MRK 421 during a TeV flare". Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021). p. 869. .
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