Jump to content

H1426+428

Add links
From Wikipedia, the free encyclopedia
H1426+428
The BL Lac object H1426+428.
Observation data (J2000.0epoch)
ConstellationBoötes
Right ascension14h28m32.60s
Declination+42° 40′ 20.97″
Redshift0.129265
Heliocentric radial velocity38,753km/s
Distance1.911Gly(585.91Mpc)
Apparent magnitude(V)16.45
Apparent magnitude(B)16.95
Characteristics
TypeBL LAC
Other designations
1ES 1426+428,LEDA2203750, 4FGL J1428.5+4240, 1ES 1426+42.8, TeV J1428+426, 1RXS J142832.6+424028,RXJ1428.5+4240

H1426+428also known as1ES 1426+428,is a high-frequency peakedBL Lacertae object(HBL)[1][2]located in theconstellationofBoötes.It is located at a relatively high[3]redshiftof (z) 0.129,[4]and was discovered in 1984 byastronomerswho presented a catalogue of X-ray sources taken with theHEAO 1 satellite.[5]

H1426+428 is classified as ablazar.[6]It is also a distant source ofTeVgamma rays.[7][8]It has low power and asynchrotronpeak that is above 100KeV.[6][9]Furthermore, H1426+428 is possibly hosted in anelliptical galaxyand is luminous inX-raybands. It has a 2-6 keV luminosity of ~1044erg s-1.[10]

The gamma emission in H1426+428 is found to have an averageflux.Its spectrum is very steep and shows a differentialspectral indexof γ = -3.60 ± 0.57, when observed by theCosmic Anisotropy Telescope(CAT) in Very High energy gamma ray bands between 1998 and 2000.[11]This steep spectrum is mainly contributed by the absorption of gamma rays in theintergalactic medium[12]or by diffusedcosmic infrared background.[11]

In 2002, H1426+428 exhibited variability in the 3-24 keVX-ray spectra.[13]However in 2006, it was in a period of X-ray inactivity, showing no gamma rays, when observed byCELESTE Cherenkov telescope.[14]The Tev activity in H1426+428 only increased just before 2008, with it experiencing flare activity for four days in 2009.[15]A long-term X-rayflarewas detected in H1426+428 in January 2021 by theX-ray telescopeonboardNeil Gehrels Swift Observatory.[16]This was followed by a very high energy gamma ray flux in March 2021.[17]

H1426+428 has a compact radio core with a ~ 17mJyflux density. In additional, it has a faintradio jetextending towards northwest with a projectposition angleof -25°.[18]There is also a faintradio halothat is surrounding the radio core as well[19]but it has weak radio and opticalpolarization.[20]

References

[edit]
  1. ^Nilsson, K.; Lindfors, E.; Takalo, L.O.; Reinthal, R.; Berdyugin, A.; Sillanpaa, A.; Ciprini, S.; Halkola, A.; Heinamaki, P. (September 2018)."Long-Term Optical Monitoring of Blazars"(PDF).Astronomy & Astrophysics.7(2): 58.doi:10.3390/galaxies7020058.ISSN2075-4434.
  2. ^Mueller, C.; Akhter, N.; Ball, J.; Bramel, D.A.; Carson, J.; Covault, C.E.; Driscoll, D.; Fortin, P.; Gingrich, D.M.; Hanna, D.S.; Jarvis, A.; Kildea, J.; Lindner, T.; Mukherjee, R.; Ong, R.A. (April 2011)."Very high-energy observations of the two high-frequency peaked BL Lac objects 1ES 1218+304 and H 1426+428".Astroparticle Physics.34(9): 674–678.arXiv:1104.2770.Bibcode:2011APh....34..674M.doi:10.1016/j.astropartphys.2011.01.010.ISSN0927-6505.
  3. ^Fan, Y. Z.; Dai, Z. G.; Wei, D. M. (February 2004)."Strong GeV emission accompanying TeV blazar H1426+428"(PDF).Astronomy & Astrophysics.415(2): 483–486.arXiv:astro-ph/0310893.Bibcode:2004A&A...415..483F.doi:10.1051/0004-6361:20034472.ISSN0004-6361.
  4. ^Horan and the VERITAS Collaboration, D. (2001)."Observations of the BL Lac object, 1H1426+428 at TeV gamma-ray energies".AIP Conference Proceedings.587.AIP: 324–328.Bibcode:2001AIPC..587..324H.doi:10.1063/1.1419423.
  5. ^Nugent, J. J.; Jensen, K. A.; Nousek, J. A.; Garmire, G. P.; Mason, K. O.; Walter, F. M.; Bowyer, C. S.; Stern, R. A.; Riegler, G. R. (January 1983)."HEAO A-2 soft X-ray source catalog".The Astrophysical Journal Supplement Series.51:1.Bibcode:1983ApJS...51....1N.doi:10.1086/190838.ISSN0067-0049.
  6. ^abNowakowski, Tomasz; Phys.org."Observers detect intraday variability of blazar 1ES 1426+42.8".phys.org.Retrieved2024-10-21.
  7. ^Horan, D.; Bond, I. H.; Boyle, P. J.; Bradbury, S. M.; Buckley, J. H.; Carter-Lewis, D.; Celik, O.; Cui, W.; Daniel, M.; D'Vali, M.; de la Calle Perez, I.; Duke, C.; Falcone, A.; Fegan, D. J.; Fegan, S. J. (2003-07-01)."Observations of H1426+428 from 1999 to 2002 with the Whipple Observatory 10 m Telescope".International Cosmic Ray Conference.5:2647.arXiv:astro-ph/0305579.Bibcode:2003ICRC....5.2647H.
  8. ^Aharonian, F.; Akhperjanian, A.; Barrio, J.; Beilicke, M.; Bernlöhr, K.; Börst, H.; Bojahr, H.; Bolz, O.; Contreras, J.; Cornils, R.; Cortina, J.; Denninghoff, S.; Fonseca, V.; Girma, M.; Gonzalez, J. (2002-03-01)."TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation".Astronomy & Astrophysics.384(3): L23–L26.Bibcode:2002A&A...384L..23A.doi:10.1051/0004-6361:20020206.ISSN0004-6361.
  9. ^Chang, X; Xiong, D R; Yi, T F; Liu, C X; Bhatta, G; Xu, J R; Gong, Y L (2024-08-07)."Optical intraday variability analysis for the BL Lacertae object 1ES 1426+42.8".Monthly Notices of the Royal Astronomical Society.533(1): 120–130.doi:10.1093/mnras/stae1839.ISSN0035-8711.
  10. ^Horan, D.; Badran, H.M.; Bond, I.H.; Bradbury, S.M.; Buckley, J.H.; Carson, M.J.; Carter-Lewis, D.A.; Catanese, M.; Cui, W.; Dunlea, S.; Das, D.; Calle Perez, I. de la; D'Vali, M. (June 2002)."Detection of the BL Lacertae Object H1426+428 at TeV Gamma-Ray Energies".The Astrophysical Journal.571(2): 753–762.arXiv:astro-ph/0202185.Bibcode:2002ApJ...571..753H.doi:10.1086/340019.
  11. ^abDjannati-Ataï, A.; Khelifi, B.; Vorobiov, S.; Bazer-Bachi, R.; Chounet, L. M.; Debiais, G.; Degrange, B.; Espigat, P.; Fabre, B.; Fontaine, G.; Goret, P.; Gouiffes, C.; Masterson, C.; Piron, F.; Punch, M. (2002-08-09)."Detection of the BL Lac object 1ES 1426+428 in the Very High Energy gamma-ray band by the CAT Telescope from 1998–2000"(PDF).Astronomy & Astrophysics.391(3): L25–L28.arXiv:astro-ph/0207618.Bibcode:2002A&A...391L..25D.doi:10.1051/0004-6361:20021034.ISSN0004-6361.
  12. ^Petry, D.; Bond, I.H.; Bradbury, S.M.; Buckley, J.H.; Carter-Lewis, D.A.; Cui, W. (November 2002)."The TeV Spectrum of H1426+428".The Astrophysical Journal.580(1): 104–109.arXiv:astro-ph/0207506.Bibcode:2002ApJ...580..104P.doi:10.1086/343102.
  13. ^Falcone, A.D. (April 2004)."X-ray and TeV observations of the extreme BL Lac AGN H1426+428 during 2002".New Astronomy Reviews.48(5–6): 415–417.Bibcode:2004NewAR..48..415F.doi:10.1016/j.newar.2003.12.051.ISSN1387-6473.
  14. ^Smith, D. A.; Brion, E.; Britto, R.; Bruel, P.; Bussons Gordo, J.; Dumora, D.; Durand, E.; Eschstruth, P.; Espigat, P.; Holder, J.; Jacholkowska, A.; Lavalle, J.; Le Gallou, R.; Lott, B.; Manseri, H. (2006-09-12)."Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov telescope"(PDF).Astronomy & Astrophysics.459(2): 453–464.arXiv:astro-ph/0608247.Bibcode:2006A&A...459..453S.doi:10.1051/0004-6361:20065884.ISSN0004-6361.
  15. ^Strigunov, K. S.; Zhovtan, A. V. (March 2015)."Long-term observations of the blazar 1ES 1426+428 with the GT-48 Cerenkov telescope".Astronomy Reports.59(3): 175–182.Bibcode:2015ARep...59..175S.doi:10.1134/s1063772915020079.ISSN1063-7729.
  16. ^Kapanadze, Bidzina (2021-04-01)."Long-Term X-ray Flaring Activity of the TeV-Detected Blazar H1426+428".The Astronomer's Telegram.14560:1.Bibcode:2021ATel14560....1K.
  17. ^Quinn, John (March 2021)."VERITAS detection of an elevated VHE flux from the blazar H 1426+428".The Astronomer's Telegram.14501:1.Bibcode:2021ATel14501....1Q.
  18. ^Piner, B. Glenn; Pant, Niraj; Edwards, Philip G. (May 2008)."The Parsec-Scale Jets of the TeV Blazars H1426+428, 1ES 1959+650, and PKS 2155−304: 2001–2004".The Astrophysical Journal.678(1): 64–77.arXiv:0801.2749.Bibcode:2008ApJ...678...64P.doi:10.1086/533521.ISSN0004-637X.
  19. ^Giroletti, M.; Giovannini, G.; Taylor, G. B.; Falomo, R. (October 2004)."A Sample of Low-Redshift BL Lacertae Objects. I. The Radio Data".The Astrophysical Journal.613(2): 752–769.arXiv:astro-ph/0406255.Bibcode:2004ApJ...613..752G.doi:10.1086/423231.ISSN0004-637X.
  20. ^Kollgaard, R. I.; Gabuzda, D. C.; Feigelson, E. D. (March 1996)."Parsec-Scale Radio Structure of Four X-Ray--selected BL Lacertae Objects".The Astrophysical Journal.460:174.Bibcode:1996ApJ...460..174K.doi:10.1086/176959.ISSN0004-637X.
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=H1426%2B428&oldid=1252489391"