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https://h2g2.com/edited_entry/A39787023#:~:text=This%20indicates%20that%20BL%20Lacertae%20is%20very%20small,which%20makes%20it%20smaller%20than%20our%20solar%20system.
https://www.sciencedirect.com/topics/physics-and-astronomy/bl-lacertae-objects
The BL Lacertae object AO 0235+164 is active in most wavelengths. The amplitude of its variability is about 3–4 and up to 100 times its quiescent flux density in radio and optical wavelengths respectively. The timescale of its variability ranges from months at low frequencies to days at optical wavelengths ( Chu et al., 1996 ).
https://kurzgesagt.fandom.com/wiki/BL_Lacertae
BL Lacertae, or shortened to BL Lac, is a very variable active galaxy nucleus (AGN), which are some sort of cousins of quasars.It's located in the constellation of Lacerta, 900 million light-years away. It was originally thought to be a variable star within the Milky Way, so it was given a variable star designation.. BL Lacertae became the prototype of an active galaxy nucleus class, known …
https://science.jrank.org/pages/945/BL-Lacertae-Object.html
BL Lacertae objects, abbreviated BL Lac, are one subclass of active galactic nuclei (AGN), the extremely energetic nuclei of active galaxies. Roughly 40 BL Lac objects are known. Perhaps the most obvious property of BL Lac objects is that they look like stars. Astronomers originally thought the prototype, BL Lac, was a star.
https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/bl-lacertae-object-0
BL Lacertae objectBL Lacertae objects, abbreviated BL Lac, are one subclass of active galactic nuclei (AGN), the extremely energetic nuclei of active galaxies. Roughly 40 BL Lac objects are known. Perhaps the most obvious property of BL Lac objects is that they look like stars. Astronomers originally thought the prototype, BL Lac, was a star .
https://en.wikipedia.org/wiki/BL_Lacertae_Object
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. Because of these properties, the prototype of the class was originally …
https://earthsky.org/constellations/lacerta-the-lizard-blazar/
BL Lacertae objects are also a type of blazar. Lacerta the Lizard with Alpha and Beta stars labeled. Star clusters in Lacerta. The majority …
http://astro.physics.uiowa.edu/~kaaret/2012f_29c235/projects/brorby_griffiths_paper.pdf
Key words: BL Lacertae objects: general { galaxies: active { gamma rays: galaxies 1. INTRODUCTION Blazars are some of the most energetic and rapidly variable objects in the universe. The prototype object, BL Lacertae (BL Lac hereafter), was originally identi ed via optical observations in the 1920’s as a variable star in the constellation of ...
https://ui.adsabs.harvard.edu/abs/2002A%26A...393...89A/abstract
Abstract. The nearby BL Lacertae (BL Lac) object Markarian 421 (Mkn 421) at a red shift z=0.031 was observed to undergo strong TeV gamma -ray outbursts in the observational periods from December 1999 until May 2001.The time averaged flux level F(E>1 TeV) in the 1999/2000 season was (1.43+/-0.04) x 10-11 ph cm-2 s-1, whereas in the 2000/2001 season the average integral …
https://quizlet.com/21432318/chapter-17-flash-cards/
BL Lacertae objects, quasars, and double-radio sources appear to be the same type of object viewed from different directions. If one of the jets is aimed almost directly at Earth, we see a BL Lac object. If the jet is somewhat tilted to our line of sight, we see a quasar. If it is tilted farther, we see an active galaxy.
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