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- Arlen, T. (author)
Rapid TeV Gamma-Ray Flaring of BL Lacertae
- Article/chapterEnglish2013
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- 2013
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:lnu-42795
- https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-42795URI
- https://doi.org/10.1088/0004-637X/762/2/92DOI
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- Language:English
- Summary in:English
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Notes
- We report on the detection of a very rapid TeV gamma-ray flare from BL Lacertae on 2011 June 28 with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The flaring activity was observed during a 34.6 minute exposure, when the integral flux above 200 GeV reached (3.4 ± 0.6) × 10–6 photons m–2 s–1, roughly 125% of the Crab Nebula flux measured by VERITAS. The light curve indicates that the observations missed the rising phase of the flare but covered a significant portion of the decaying phase. The exponential decay time was determined to be 13 ± 4 minutes, making it one of the most rapid gamma-ray flares seen from a TeV blazar. The gamma-ray spectrum of BL Lacertae during the flare was soft, with a photon index of 3.6 ± 0.4, which is in agreement with the measurement made previously by MAGIC in a lower flaring state. Contemporaneous radio observations of the source with the Very Long Baseline Array revealed the emergence of a new, superluminal component from the core around the time of the TeV gamma-ray flare, accompanied by changes in the optical polarization angle. Changes in flux also appear to have occurred at optical, UV, and GeV gamma-ray wavelengths at the time of the flare, although they are difficult to quantify precisely due to sparse coverage. A strong flare was seen at radio wavelengths roughly four months later, which might be related to the gamma-ray flaring activities. We discuss the implications of these multiwavelength results.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- galaxies: active
- galaxies: individual: BL Lacertae VER J2202+422
- gamma rays: galaxies
- Astropartikelfysik
- Astroparticle Physics
Added entries (persons, corporate bodies, meetings, titles ...)
- Aune, T. (author)
- Beilicke, M. (author)
- Benbow, W. (author)
- Bouvier, A. (author)
- Buckley, J. H. (author)
- Bugaev, V. (author)
- Cesarini, A. (author)
- Ciupik, L. (author)
- Connolly, M. P. (author)
- Cui, W. (author)
- Dickherber, R. (author)
- Dumm, J. (author)
- Errando, M. (author)
- Falcone, A. (author)
- Federici, S. (author)
- Feng, Q. (author)
- Finley, J. P. (author)
- Finnegan, G. (author)
- Fortson, L. (author)
- Furniss, A. (author)
- Galante, N. (author)
- Gall, D. (author)
- Griffin, S. (author)
- Grube, J. (author)
- Gyuk, G. (author)
- Hanna, D. (author)
- Holder, J. (author)
- Humensky, T. B. (author)
- Kaaret, P. (author)
- Karlsson, N. (author)
- Kertzman, M. (author)
- Khassen, Y. (author)
- Kieda, D. (author)
- Krawczynski, H. (author)
- Krennrich, F. (author)
- Maier, G. (author)
- Moriarty, P. (author)
- Mukherjee, R. (author)
- Nelson, T. (author)
- O’Faoláin de Bhróithe, A. (author)
- Ong, R. A. (author)
- Orr, M. (author)
- Park, N. (author)
- Perkins, J. S. (author)
- Pichel, A. (author)
- Pohl, M. (author)
- Prokoph, HeikeDESY, Germany(Swepub:lnu)hepraa (author)
- Quinn, J. (author)
- Ragan, K. (author)
- Reyes, L. C. (author)
- Reynolds, P. T. (author)
- Roache, E. (author)
- Saxon, D. B. (author)
- Schroedter, M. (author)
- Sembroski, G. H. (author)
- Staszak, D. (author)
- Telezhinsky, I. (author)
- Te\v sić, G. (author)
- Theiling, M. (author)
- Tsurusaki, K. (author)
- Varlotta, A. (author)
- Vincent, S. (author)
- Wakely, S. P. (author)
- Weekes, T. C. (author)
- Weinstein, A. (author)
- Welsing, R. (author)
- Williams, D. A. (author)
- Zitzer, B. (author)
- Collaboration, V E R I T A S (author)
- Jorstad, S. G. (author)
- MacDonald, N. R. (author)
- Marscher, A. P. (author)
- Smith, P. S. (author)
- Walker, R. C. (author)
- Hovatta, T. (author)
- Richards, J. (author)
- Max-Moerbeck, W. (author)
- Readhead, A. (author)
- Lister, M. L. (author)
- Kovalev, Y. Y. (author)
- Pushkarev, A. B. (author)
- Gurwell, M. A. (author)
- Lähteenmäki, A. (author)
- Nieppola, E. (author)
- Tornikoski, M. (author)
- Järvelä, E. (author)
- DESY, Germany (creator_code:org_t)
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- Bugaev, V.
- Cesarini, A.
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- Reyes, L. C.
- Reynolds, P. T.
- Roache, E.
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- Telezhinsky, I.
- Te\v sić, G.
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- Vincent, S.
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- Weinstein, A.
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- Collaboration, V ...
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- Lähteenmäki, A.
- Nieppola, E.
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- Järvelä, E.
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