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A blazar is an active galactic nucleus (AGN) with a relativistic jet (a jet composed of ionized matter traveling at nearly the speed of light) directed very nearly towards an observer. Relativistic beaming of electromagnetic radiation from the jet makes blazars appear much brighter than they would be if the jet were pointed in a direction away ...
3C 454.3 is a blazar (a type of quasar with a jet oriented toward Earth) located away from the galactic plane.It is one of the brightest gamma ray sources in the sky, [2] and is one of the most luminous astronomical object ever observed, with a maximum absolute magnitude of -31.4. [3]
A BL Lacertae object or BL Lac object is a type of active galactic nucleus (AGN) or a galaxy with such an AGN, named after its prototype, BL Lacertae. In contrast to other types of active galactic nuclei, BL Lacs are characterized by rapid and large-amplitude flux variability and significant optical polarization. [ 1 ]
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]
1ES 1959+650 is a BL Lacertae object or a BL Lac object located in the eastern constellation of Draco, about 676 million light years from Earth. [1] It was first discovered as an astronomical radio source in 1987 by Green Bank Radio Telescope and further categorized as both a flat-spectrum radio source and an X-ray source during the Einstein IPC Slew Survey conducted in the early 1990s.
B2 1308+326 known as OP 313 or AU CVn, is a BL Lacertae object [1] located in the constellation of Canes Venatici. It has a redshift of (z) 0.997 [2] and was initially discovered as a variable star in 1959 before being identified with its optical counterpart in 1972. [3] Its radio spectrum is flat, making it a FRSQ (flat-spectrum radio quasar ...
BL Lac objects are also categorized as a type of blazar. BL Lacertae changes in apparent magnitude over fairly small time periods, typically between values of 14 and 17. In January 2021, it exhibited extreme flaring behavior and was reported to reach magnitude 11.45 in the R filter band. [5]
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