Results 71 to 80 of about 272 (130)
The Astrophysical JournalWe present a comprehensive analysis of the broadband spectral energy distribution (SED) of the extreme high-energy peaked BL Lac source, 1ES 0229+200. Our study utilizes near-simultaneous data collected at various epochs between 2017 September and 2021 ...
Jyotishree Hota +3 more
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The Spectral Variation Behavior of Fermi-LAT Blazars
The Astrophysical JournalIn this study, we analyze the ∼16 yr Fermi-Large Area Telescope data of 160 blazars consisting of 92 flat-spectrum radio quasars (FSRQs), 64 BL Lacertae (BL Lac)–type objects, and 4 blazar-candidates-of-unknown-type objects, and investigate their ...
Junhao Deng, Yunguo Jiang
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BL Lacertae Objects: A Short Review
Communications of the Byurakan Astrophysical Observatory, 2019 BL Lacertae objects (BLLs) constitute a class of active galactic nuclei (AGNs) with extreme observational features explained by non-thermal radiation from a relativistic jet nearly pointed along the observer’s line-of-sight. Their spectral energy distribution (SED), extending over 17-19 orders of the frequency, is of non-thermal origin and shows a ...
openaire +1 more source
Assigning Degrees of Stochasticity to Blazar Light Curves in the Radio Band Using Complex Networks. [PDF]
Entropy (Basel), 2022 Acosta-Tripailao B +3 more
europepmc +1 more source
Revealing High-z Fermi-LAT BL Lacs Using Swift and SARA Data with Photometric Analysis
The Astrophysical JournalBL Lacertae (BL Lac) objects are a subclass of blazar, distinguished by their featureless optical spectrum. The featureless spectrum presents a challenge in measuring the redshift of the BL Lacs.
Y. Sheng +14 more
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UniverseBL Lacertae is not only archetypical of an entire class of jet-dominated active galactic nuclei, blazars, but also one of the most active and rapidly changing objects in this class.
Rumen Bachev +3 more
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Investigating Optical Variability of the Blazar S5 0716+714 on Diverse Timescales
The Astrophysical JournalWe present the results of the observational study of the blazar S5 0716+716 in the optical bands B , V , R , and I between 2019 March and 2023 August to investigate its variability on diverse timescales.
Ergün Ege +3 more
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The megaparsec-scale environments of BL Lacertae objects
The Astrophysical Journal, 1995 We compare observations of BL Lac megaparsec-scale clustering environments with those for F-R I radio galaxies V and R image data are used to show that the strengths of the clustering measured via spatial cross-correlation amplitude are similar for the two types of galaxies and are consistent with Abel richness class 0. We discuss the implications this
Eric P. Smith, C. P. O'Dea, S. A. Baum
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From Equipartition to Curvature: The Spectral Evolution of 4FGL Blazars
The Astrophysical Journal Supplement SeriesWe investigate the evolution of spectral energy distribution (SED) and underlying electron energy distribution (EED) by modeling the nearly simultaneous broadband spectra of selected bright 4FGL blazars, in the context of a combined cooling and ...
Muhammad S. Anjum +4 more
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No evidence for radio-quiet BL Lacertae objects
The Astrophysical Journal, 1990 Using a large, flux-limited sample of faint X-ray sources, a search has been conducted for radio-quiet BL Lacertae objects. None has been found. Thirty-two X-ray-selected BL Lac objects and BL Lac candidates have been found within the sources of the Einstein Medium Sensitivity Survey (EMSS).
John T. Stocke +5 more
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