Multiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flare

Simple item page
dc.contributor.authorVERITAS Collaboration
dc.contributor.otherUtah System of Higher Education
dc.contributor.otherUniversity of Utah
dc.contributor.otherHarvard University
dc.contributor.otherSmithsonian Institution
dc.contributor.otherUniversity of California System
dc.contributor.otherUniversity of California Los Angeles
dc.contributor.otherIowa State University
dc.contributor.otherUniversity of Potsdam
dc.contributor.otherHelmholtz Association
dc.contributor.otherDeutsches Elektronen-Synchrotron (DESY)
dc.contributor.otherWashington University (WUSTL)
dc.contributor.otherOllscoil na Gaillimhe-University of Galway
dc.contributor.otherPurdue University System
dc.contributor.otherPurdue University
dc.contributor.otherPurdue University West Lafayette Campus
dc.contributor.otherTsinghua University
dc.contributor.otherPennsylvania Commonwealth System of Higher Education (PCSHE)
dc.contributor.otherPennsylvania State University
dc.contributor.otherPennsylvania State University - University Park
dc.contributor.otherMcGill University
dc.contributor.otherColumbia University
dc.contributor.otherUniversity of Minnesota System
dc.contributor.otherUniversity of Minnesota Twin Cities
dc.contributor.otherCalifornia State University System
dc.contributor.otherCalifornia State University East Bay
dc.contributor.otherUniversity of California Santa Cruz
dc.contributor.otherUniversity of Delaware
dc.contributor.otherUniversity of Iowa
dc.contributor.otherDePauw University
dc.contributor.otherUniversity College Dublin
dc.contributor.otherUniversity System of Georgia
dc.contributor.otherGeorgia Institute of Technology
dc.contributor.otherUniversity of Chicago
dc.contributor.otherCork Institute of Technology
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherBoston University
dc.contributor.otherSaint Petersburg State University
dc.contributor.otherRussian Academy of Sciences
dc.contributor.otherRussian Academy of Science Lebedev Physical Institute
dc.contributor.otherMoscow Institute of Physics & Technology
dc.contributor.otherMax Planck Society
dc.contributor.otherAalto University
dc.contributor.otherConsejo Superior de Investigaciones Cientificas (CSIC)
dc.contributor.otherCSIC - Instituto de Astrofisica de Andalucia (IAA)
dc.contributor.otherCalifornia Institute of Technology
dc.contributor.otherUniversity of Turku
dc.contributor.otherUniversity of Arizona
dc.date.accessioned2019-06-17T20:29:32Z
dc.date.available2019-06-17T20:29:32Z
dc.date.issued2018-03-28
dc.description.abstractCombined with measurements made by very-long-baseline interferometry, the observations of fast TeV gamma-ray flares probe the structure and emission mechanism of blazar jets. However, only a handful of such flares have been detected to date, and only within the last few years have these flares been observed from lower-frequency-peaked BL. Lac objects and flat-spectrum radio quasars. We report on a fast TeV gamma-ray flare from the blazar BL. Lacertae observed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS). with a rise time of similar to 2.3 hr and a decay time of similar to 36 min. The peak flux above 200 GeV is (4.2 +/- 0.6) x 10(-6) photon m(-2) s(-1) measured with a 4-minute-binned light curve, corresponding to similar to 180% of the flux that is observed from the Crab Nebula above the same energy threshold. Variability contemporaneous with the TeV gamma-ray flare was observed in GeV gamma-ray, X-ray, and optical flux, as well as in optical and radio polarization. Additionally, a possible moving emission feature with superluminal apparent velocity was identified in Very Long Baseline Array observations at 43 GHz, potentially passing the radio core of the jet around the time of the gamma-ray flare. We discuss the constraints on the size, Lorentz factor, and location of the emitting region of the flare, and the interpretations with several theoretical models that invoke relativistic plasma passing stationary shocks.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationAbeysekara, A.U., et al. (2018): Multiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flare. The Astrophysical Journal, 856(2). DOI: https://doi.org/10.3847/1538-4357/aab35c
dc.identifier.doi10.3847/1538-4357/aab35c
dc.identifier.orcidhttps://orcid.org/0000-0002-2126-2419
dc.identifier.orcidhttps://orcid.org/0000-0002-6324-5772
dc.identifier.orcidhttps://orcid.org/0000-0001-6674-4238
dc.identifier.orcidhttps://orcid.org/0000-0002-9702-2307
dc.identifier.orcidhttps://orcid.org/0000-0001-6158-1708
dc.identifier.orcidhttps://orcid.org/0000-0002-8053-7910
dc.identifier.orcidhttps://orcid.org/0000-0001-6314-9177
dc.identifier.orcidhttps://orcid.org/0000-0001-7861-1707
dc.identifier.orcidhttps://orcid.org/0000-0001-9303-3263
dc.identifier.orcidhttps://orcid.org/0000-0002-5955-6383
dc.identifier.orcidhttps://orcid.org/0000-0002-4640-4356
dc.identifier.orcidhttps://orcid.org/0000-0001-7297-8217
dc.identifier.orcidhttps://orcid.org/0000-0001-7483-4348
dc.identifier.orcidhttps://orcid.org/0000-0002-4855-2694
dc.identifier.orcidhttps://orcid.org/0000-0002-4596-8563
dc.identifier.orcidhttps://orcid.org/0000-0001-6214-1085
dc.identifier.orcidhttps://orcid.org/0000-0003-4190-7613
dc.identifier.orcidhttps://orcid.org/0000-0003-4641-4201
dc.identifier.orcidhttps://orcid.org/0000-0003-1387-8915
dc.identifier.orcidhttps://orcid.org/0000-0002-8312-6930
dc.identifier.orcidhttps://orcid.org/0000-0002-8006-9854
dc.identifier.orcidhttps://orcid.org/0000-0003-3878-1677
dc.identifier.orcidhttps://orcid.org/0000-0003-2098-170X
dc.identifier.orcidhttps://orcid.org/0000-0002-4837-5253
dc.identifier.orcidhttps://orcid.org/0000-0002-1432-7771
dc.identifier.orcidhttps://orcid.org/0000-0003-1315-3412
dc.identifier.orcidhttps://orcid.org/0000-0002-2133-5251
dc.identifier.orcidhttps://orcid.org/0000-0002-1798-2130
dc.identifier.orcidhttps://orcid.org/0000-0002-1067-8558
dc.identifier.orcidhttps://orcid.org/0000-0003-1249-6026
dc.identifier.orcidhttps://orcid.org/0000-0002-3777-6182
dc.identifier.orcidhttps://orcid.org/0000-0002-2024-8199
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5777
dc.languageEnglish
dc.language.isoen_US
dc.publisherIOP Publishing
dc.subjectBL Lacertae objects: individual (BL Lacertae = VER J2202+422)
dc.subjectgalaxies: active
dc.subjectACTIVE GALACTIC NUCLEI
dc.subjectBLACK-HOLE MASS
dc.subjectPOLARIMETRIC OBSERVATIONS
dc.subjectRADIO POLARIZATION
dc.subjectHIGH-FREQUENCIES
dc.subjectLAC OBJECTS
dc.subjectJETS
dc.subjectVARIABILITY
dc.subjectEMISSION
dc.subjectENERGY
dc.subjectAstronomy & Astrophysics
dc.titleMultiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flareen_US
dc.typetext
dc.typeArticle

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
MSantander_Multiwavelength Observations of the Blazar BL Lacertae A New Fast TeV Gamma-Ray Flare_Physics and Astronomy.pdf
Size:
2.24 MB
Format:
Adobe Portable Document Format
Description:
Main article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.27 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Research and Publications - Department of Physics & Astronomy