1ES 1101-232

1ES 1101-232
The blazar 1ES 1101-232 taken by Pan-STARRS.
Observation data (Epoch J2000)
ConstellationCrater
Right ascension11h 03m 37.6150843895s
Declination−23° 29′ 31.202114088″
Redshift0.186
Distance2.445 Gly (749.64 Mpc)
TypeBL Lac
Apparent magnitude (V)16.55
Other designations
2FHL J1104.0-2331, PGC 3765110, TXS 1101-232, 2MASX J11033765-2329307, RBS 0936
See also: Quasar, List of quasars

1ES 1101-232 is an active galactic nucleus of a distant galaxy known as a blazar.[1] It is also a BL Lac object.[2]

An X-ray source (catalogued as A 1059-22) was first recorded by Maccagni and colleagues in a 1978 paper; they thought the source arose from a galaxy in the Abell 1146 galaxy cluster, which contained many giant elliptical galaxies.[3] In 1989, Remillard and colleagues linked the X-ray source with a visual object and established that the object was surrounded by a large elliptical galaxy. They also discovered that the object (and galaxy) were more distant, with a redshift of 0.186.[4] The host galaxy appears to be part of a distant galaxy cluster.[5]

Between 2004 and 2005, 1ES 1101-232 showed gamma-ray emission which was detected by the High Energy Stereoscopic System of Atmospheric Cherenkov Telescope. Astronomers observed it for 43 hours, which they studied the blazar for its inner jets and the extragalactic background light.[6] In November 2023, an X-ray flare was detected in 1ES 1101-232.[7]

References

  1. ^ Cao, Gang; Wang, Jiancheng (2014-02-21). "The Hadronic Origin of the Hard Gamma-Ray Spectrum from Blazar 1Es 1101-232". The Astrophysical Journal. 783 (2): 108. arXiv:1401.3970. Bibcode:2014ApJ...783..108C. doi:10.1088/0004-637x/783/2/108. ISSN 0004-637X.
  2. ^ Wolter, Anna; Ghisellini, Gabriele; Tagliaferri, Gainpiero; Tavecchio, Fabrizio; Caccianiga, Alessandro (2001-12-01). "Hard synchrotron BL lacs: The case of 1ES 1101-232". X-Ray Astronomy: Stellar Endpoints. 599: 1011–1014. arXiv:astro-ph/0007090. Bibcode:2001AIPC..599.1011W. doi:10.1063/1.1434797.
  3. ^ Maccagni, D.; Tarenghi, M.; Cooke, B. A.; Maccacaro, T.; Pye, J. P.; Ricketts, M. J. (1978). "An X-ray and optical study of seven clusters of galaxies". Astronomy and Astrophysics. 62 (1–2): 127–33. Bibcode:1978A&A....62..127M.
  4. ^ Remillard, R. A.; Tuohy, I. R.; Brissenden, R. J. V.; Buckley, D. A. H.; Schwartz, D. A.; Feigelson, E. D.; Tapia, S. (1989). "Two X-ray-selected BL Lacertae objects observed with the HEAO 1 scanning modulation collimator". Astrophysical Journal, Part 1. 345: 140–47. Bibcode:1989ApJ...345..140R. doi:10.1086/167888. ISSN 0004-637X.
  5. ^ Pesce, Joseph E.; Falomo, Renato.; Treves, Aldo (1994). "Imaging and spectroscopy of galaxies in the fields of five BL Lacertae objects". Astronomical Journal. 107 (2): 494–502. Bibcode:1994AJ....107..494P. doi:10.1086/116871. ISSN 0004-6256.
  6. ^ Collaboration, H. E. S. S.; Aharonian, F. (August 2007). "Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with H.E.S.S. and broadband characterisation". Astronomy & Astrophysics. 470 (2): 475–489. arXiv:0705.2946. Bibcode:2007A&A...470..475A. doi:10.1051/0004-6361:20077057. ISSN 0004-6361.
  7. ^ Kapanadze, Bidzina (2024-01-01). "Long-Term X-Ray Flare in the Southern Blazar 1ES 1101-232". The Astronomer's Telegram. 16396: 1. Bibcode:2024ATel16396....1K.
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