BL Lac object

(redirected from BL Lacertae objects)
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Related to BL Lacertae objects: Seyfert galaxy, Blazar, abl, quasar, ACBL

BL Lac object

n
(Celestial Objects) an extremely compact violently variable form of active galaxy
[C20: named after BL Lacertae, first identified example found in the constellation Lacerta and originally thought to be a variable star]
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References in periodicals archive ?
Although there are several classes of AGNs, only three will be addressed here: Seyfert galaxies, BL Lacertae objects (BLL), and quasars--see the website above for a summary of their characteristics.
Gravitational lensing may explain, for example, the puzzling, quasar-like properties of so-called BL Lacertae objects sometimes found embedded in nearby galaxies.
I crossed-checked this with Wolfgang Steinicke's Catalogue of Bright Quasars and BL Lacertae Objects and investigated problematic entries with the SIMBAD Astronomical Database and the NASA/IPAC Extragalactic Database.