And Bl Lacertae Objects Within A Few Hours

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BL Lacertae Objects - an overview ScienceDirect Topics

    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 …

BL Lacertae objects (Journal Article) OSTI.GOV

    https://www.osti.gov/biblio/7326228-bl-lacertae-objects
    Abstract. Research on BL Lac objects has been concerned mainly with (a) documenting their properties, (b) investigating their relationship to QSO's and galaxies, (c) determining their distances in the absence of emission lines, and (d) accounting for the continuum emission within …

BL Lacertae Object - Objects, Emission, Light, and Star ...

    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.

473 Variations in the output of quasars within a few hours ...

    https://www.coursehero.com/file/p77vifra/473-Variations-in-the-output-of-quasars-within-a-few-hours-are-an-indication-of/
    473) Variations in the output of quasars within a few hours are an indication: of the relatively small size of the emitting regions. 474) A BL Lacertae object is a (n): active galactic nucleus. 475) Most quasars produce their strongest emissions in which region of the electromagnetic spectrum? infrared. 476) Astronomers initially had difficulty ...

VRI photometry of stars in the fields of 12 BL Lacertae ...

    https://aas.aanda.org/articles/aas/pdf/1996/06/ds1068.pdf
    BL Lacertae objects (BL Lacs) are radio{loud active galactic nuclei (AGN), characterized by rapid and large amplitude variability, high and variable flux polarization, absence of emission or absorption lines in the spectra (Stein et al. 1976; Angel & Stockman 1980). Most of these objects show superluminal motion, and they are among the few ...Cited by: 145

X-ray selected BL Lacertae objects: catalogue and ...

    https://core.ac.uk/download/pdf/87404688.pdf
    Key words: BL Lacertae objects: general introduction BL Lacertae objects form one of the extreme sub-classes of active galactic nuclei (AGN). The proto-type of these sources, BL Lacertae, was detected by [11] who classified it as a short-period variable star of 13-15 stellar magnitude and named the object as “363.1929 Lac”.

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