Astronomy:H1426+428

From HandWiki
H1426+428
The BL Lac object H1426+428.
Observation data (J2000.0 epoch)
ConstellationBoötes
Right ascension 14h 28m 32.60s
Declination+42° 40′ 20.97″
Redshift0.129265
Helio radial velocity38,753 km/s
Distance1.911 Gly (585.91 Mpc)
Apparent magnitude (V)16.45
Apparent magnitude (B)16.95
Characteristics
TypeBL LAC
Other designations
1ES 1426+428, LEDA 2203750, 4FGL J1428.5+4240, 1ES 1426+42.8, TeV J1428+426, 1RXS J142832.6+424028, RX J1428.5+4240

H1426+428 also known as 1ES 1426+428, is a high-frequency peaked BL Lacertae object (HBL)[1][2] located in the constellation of Boötes. It is located at a relatively high[3] redshift of (z) 0.129,[4] and was discovered in 1984 by astronomers who presented a catalogue of X-ray sources taken with the HEAO 1 satellite.[5]

H1426+428 is classified as a blazar.[6] It is also a distant source of TeV gamma rays.[7][8] It has low power and a synchrotron peak that is above 100 KeV.[6][9] Furthermore, H1426+428 is possibly hosted in an elliptical galaxy and is luminous in X-ray bands. It has a 2-6 keV luminosity of ~1044 erg s−1.[10]

The gamma emission in H1426+428 is found to have an average flux. Its spectrum is very steep and shows a differential spectral index of γ = -3.60 ± 0.57, when observed by the Cosmic 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 the intergalactic medium[12] or by diffused cosmic infrared background.[11]

In 2002, H1426+428 exhibited variability in the 3-24 keV X-ray spectra.[13] However in 2006, it was in a period of X-ray inactivity, showing no gamma rays, when observed by CELESTE 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-ray flare was detected in H1426+428 in January 2021 by the X-ray telescope onboard Neil 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 ~ 17 mJy flux density. In additional, it has a faint radio jet extending towards northwest with a project position angle of -25°.[18] There is also a faint radio halo that is surrounding the radio core as well[19] but it has weak radio and optical polarization.[20]

References

  1. ↑ Nilsson, K.; Lindfors, E.; Takalo, L. O.; Reinthal, R.; Berdyugin, A.; Sillanpää, A.; Ciprini, S.; Halkola, A. et al. (2018). "Long-term optical monitoring of TeV emitting blazars". Astronomy & Astrophysics 620: A185. doi:10.1051/0004-6361/201833621. 
  2. ↑ Mueller, C.; Akhter, N.; Ball, J.; Bramel, D.A.; Carson, J.; Covault, C.E.; Driscoll, D.; Fortin, P. et al. (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. doi:10.1016/j.astropartphys.2011.01.010. ISSN 0927-6505. Bibcode: 2011APh....34..674M. http://dx.doi.org/10.1016/j.astropartphys.2011.01.010. 
  3. ↑ Fan, Y. Z.; Dai, Z. G.; Wei, D. M. (February 2004). "Strong GeV emission accompanying TeV blazar H1426+428". Astronomy & Astrophysics 415 (2): 483–486. doi:10.1051/0004-6361:20034472. ISSN 0004-6361. Bibcode: 2004A&A...415..483F. https://www.aanda.org/articles/aa/pdf/2004/08/aa0472.pdf. 
  4. ↑ Horan and the VERITAS Collaboration, D. (2001). "Observations of the BL Lac object, 1H1426+428 at TeV gamma-ray energies". AIP Conference Proceedings (AIP) 587: 324–328. doi:10.1063/1.1419423. Bibcode: 2001AIPC..587..324H. http://dx.doi.org/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. et al. (January 1983). "HEAO A-2 soft X-ray source catalog". The Astrophysical Journal Supplement Series 51: 1. doi:10.1086/190838. ISSN 0067-0049. Bibcode: 1983ApJS...51....1N. https://articles.adsabs.harvard.edu/pdf/1984ApJS...56..507W. 
  6. ↑ 6.0 6.1 Nowakowski, Tomasz; Phys.org. "Observers detect intraday variability of blazar 1ES 1426+42.8" (in en). https://phys.org/news/2024-09-intraday-variability-blazar-1es.html. 
  7. ↑ Horan, D.; Bond, I. H.; Boyle, P. J.; Bradbury, S. M.; Buckley, J. H.; Carter-Lewis, D.; Celik, O.; Cui, W. et al. (2003-07-01). "Observations of H1426+428 from 1999 to 2002 with the Whipple Observatory 10 m Telescope". International Cosmic Ray Conference 5: 2647. Bibcode: 2003ICRC....5.2647H. https://ui.adsabs.harvard.edu/abs/2003ICRC....5.2647H/abstract. 
  8. ↑ Aharonian, F.; Akhperjanian, A.; Barrio, J.; Beilicke, M.; Bernlöhr, K.; Börst, H.; Bojahr, H.; Bolz, O. et al. (2002-03-01). "TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation" (in en). Astronomy & Astrophysics 384 (3): L23–L26. doi:10.1051/0004-6361:20020206. ISSN 0004-6361. Bibcode: 2002A&A...384L..23A. https://www.aanda.org/articles/aa/abs/2002/12/aadi211/aadi211.html. 
  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. ISSN 0035-8711. 
  10. ↑ Horan, D.; Badran, H.M.; Bond, I.H.; Bradbury, S.M.; Buckley, J.H.; Carson, M.J.; Carter-Lewis, D.A.; Catanese, M. et al. (June 2002). "Detection of the BL Lacertae Object H1426+428 at TeV Gamma-Ray Energies". The Astrophysical Journal 571 (2): 753–762. doi:10.1086/340019. Bibcode: 2002ApJ...571..753H. https://iopscience.iop.org/article/10.1086/340019/fulltext/. 
  11. ↑ 11.0 11.1 Djannati-Ataï, A.; Khelifi, B.; Vorobiov, S.; Bazer-Bachi, R.; Chounet, L. M.; Debiais, G.; Degrange, B.; Espigat, P. et al. (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". Astronomy & Astrophysics 391 (3): L25–L28. doi:10.1051/0004-6361:20021034. ISSN 0004-6361. Bibcode: 2002A&A...391L..25D. https://www.aanda.org/articles/aa/pdf/2002/33/aaef182.pdf. 
  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. doi:10.1086/343102. Bibcode: 2002ApJ...580..104P. https://iopscience.iop.org/article/10.1086/343102/fulltext/. 
  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. doi:10.1016/j.newar.2003.12.051. ISSN 1387-6473. Bibcode: 2004NewAR..48..415F. http://dx.doi.org/10.1016/j.newar.2003.12.051. 
  14. ↑ Smith, D. A.; Brion, E.; Britto, R.; Bruel, P.; Bussons Gordo, J.; Dumora, D.; Durand, E.; Eschstruth, P. et al. (2006-09-12). "Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov telescope". Astronomy & Astrophysics 459 (2): 453–464. doi:10.1051/0004-6361:20065884. ISSN 0004-6361. Bibcode: 2006A&A...459..453S. https://www.aanda.org/articles/aa/pdf/2006/44/aa5884-06.pdf. 
  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. doi:10.1134/s1063772915020079. ISSN 1063-7729. Bibcode: 2015ARep...59..175S. http://dx.doi.org/10.1134/s1063772915020079. 
  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. https://ui.adsabs.harvard.edu/abs/2021ATel14560....1K/abstract. 
  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. https://ui.adsabs.harvard.edu/abs/2021ATel14501....1Q/abstract. 
  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. doi:10.1086/533521. ISSN 0004-637X. Bibcode: 2008ApJ...678...64P. https://iopscience.iop.org/article/10.1086/533521/pdf. 
  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. doi:10.1086/423231. ISSN 0004-637X. Bibcode: 2004ApJ...613..752G. https://iopscience.iop.org/article/10.1086/423231/fulltext/. 
  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. doi:10.1086/176959. ISSN 0004-637X. Bibcode: 1996ApJ...460..174K. https://articles.adsabs.harvard.edu//full/1996ApJ...460..174K/0000175.000.html. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:H1426%2B428&oldid=3945378"