Accès ouvert déclaré
2010
article
GAMMA-RAY LIGHT CURVES AND VARIABILITY OF BRIGHTFERMI-DETECTED BLAZARS
A. A. Abdo, M. Ackermann, M. Ajello, E. Antolini, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, B. Berenji, R. D. Blandford, E. D. Bloom, E. Bonamente, A. W. Borgland, A. Bouvier, J. Bregeon, A. Brez, M. Brigida, P. Bruel, R. Buehler, T. H. Burnett, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, S. Carrigan, J. M. Casandjian, E. Cavazzuti, C. Cecchi, Ö. Çelik, A. Chekhtman, C. C. Cheung, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, L. R. Cominsky, J. M. Conrad, L. Costamante, S. Cutini, C. D. Dermer, A. De Angelis, E. do Couto e Silva, P. S. Drell, R. Dubois, D. Dumora, C. Farnier, C. Favuzzi, S. Fegan, W. B. Focke, P. Fortin, M. Frailis, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, B. Giebels, N. Giglietto, P. Giommi, F. Giordano, T. Glanzman, G. Godfrey, I. A. Grenier, M.-H. Grondin, J. E. Grove, S. Guiriec, D. Hadasch, M. Hayashida, E. Hays, S. E. Healey, D. Horan, R. E. Hughes, R. Itoh, G. Jóhannesson, A. S. Johnson, W. N. Johnson, T. Kamae, H. Katagiri, J. Kataoka, N. Kawai, J. Knödlseder, M. Kuss, J. Landé, S. Larsson, L. Latronico, M. Lemoine‐Goumard, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, G. M. Madejski, A. Makeev, E. Massaro, M. N. Mazziotta, J. E. McEnery, P. F. Michelson, W. Mitthumsiri, Tsunefumi Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, A. Morselli, I. V. Moskalenko, Martin Mueller, S. Murgia, P. L. Nolan, J. P. Norris, E. Nuss, M. Ohno, T. Ohsugi, N. Omodei, J. F. Ormes, Masanori Ozaki, J. Panetta, D. Parent, V. Pelassa, M. Pepé, M. Pesce-Rollins, F. Piron, T. A. Porter, S. Rainò, R. Rando, M. Razzano, A. Reimer, O. Reimer, S. Ritz, A. Y. Rodriguez, Roger W. Romani, M. Roth, F. Ryde, H. F-W. Sadrozinski, A. Sander, J. D. Scargle, C. Sgró, M. S. Shaw, P. D. Smith, G. Spandre, P. Spinelli, Jean‐Luc Starck, M. S. Strickman, D. J. Suson, H. Takahashi, T. Takahashi, Takaaki Tanaka, J. B. Thayer, J. G. Thayer, D. J. Thompson, L. Tibaldo, D. F. Torres, G. Tosti, A. Tramacere, Y. Uchiyama, T. Usher, V. Vasileiou, N. Vilchez, V. Vitale, A. P. Waite, E. Wallace, P. Wang, B. L. Winer, K. S. Wood, Z. Yang, T. Ylinen, M. Ziegler
366Citations signalées, ce qui n’est pas une note de qualité
64Institutions déclarées
9Pays d’affiliation déclarés
Rattachement africain : us, it, fr, es, se, jp, de, at, ch.
Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
This paper presents light curves as well as the first systematic characterization of variability of the 106 objects in the high-confidence Fermi Large Area Telescope Bright AGN Sample (LBAS). Weekly light curves of this sample, obtained during the first 11 months of the Fermi survey (2008 August 4–2009 July 4), are tested for variability and their properties are quantified through autocorrelation function and structure function analysis. For the brightest sources, 3 or 4 day binned light curves are extracted in order to determine power density spectra (PDSs) and to fit the temporal structure of major flares. More than 50% of the sources are found to be variable with high significance, where high states do not exceed 1/4 of the total observation range. Variation amplitudes are larger for flat spectrum radio quasars and low/intermediate synchrotron frequency peaked BL Lac objects. Autocorrelation timescales derived from weekly light curves vary from four to a dozen of weeks. Variable sources of the sample have weekly and 3–4 day bin light curves that can be described by 1/ f α PDS, and show two kinds of gamma-ray variability: (1) rather constant baseline with sporadic flaring activity characterized by flatter PDS slopes resembling flickering and red noise with occasional intermittence and (2)—measured for a few blazars showing strong activity—complex and structured temporal profiles characterized by long-term memory and steeper PDS slopes, reflecting a random walk underlying mechanism. The average slope of the PDS of the brightest 22 FSRQs and of the 6 brightest BL Lacs is 1.5 and 1.7, respectively. The study of temporal profiles of well-resolved flares observed in the 10 brightest LBAS sources shows that they generally have symmetric profiles and that their total duration vary between 10 and 100 days. Results presented here can assist in source class recognition for unidentified sources and can serve as reference for more detailed analysis of the brightest gamma-ray blazars.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- GAMMA-RAY LIGHT CURVES AND VARIABILITY OF BRIGHT<i>FERMI</i>-DETECTED BLAZARS
- Date Crossref
- 22/09/2010
- Éditeur
- American Astronomical Society
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Les institutions déclarées
United States Naval Research LaboratoryNational Academy of SciencesNational Academies of Sciences, Engineering, and MedicineSLAC National Accelerator LaboratoryKavli Institute for Particle Astrophysics and CosmologyStanford UniversityUniversity of PerugiaIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaIstituto Nazionale di Fisica Nucleare, Sezione di PisaCentre National de la Recherche ScientifiqueUniversité Paris CitéCommissariat à l'Énergie Atomique et aux Énergies AlternativesAstrophysique, Instrumentation et ModélisationCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversUniversity of TriesteIstituto Nazionale di Fisica Nucleare, Sezione di TriesteUniversity of PaduaIstituto Nazionale di Fisica Nucleare, Sezione di PadovaIstituto Nazionale di Fisica Nucleare, Sezione di BariPolytechnic University of BariÉcole PolytechniqueInstitut National de Physique Nucléaire et de Physique des ParticulesLaboratoire Leprince-RinguetUniversity of WashingtonInstitute of Space SciencesIstituto di Astrofisica Spaziale e Fisica Cosmica di MilanoAgenzia Spaziale ItalianaGoddard Space Flight CenterUniversity of Maryland, Baltimore CountyGeorge Mason UniversityUniversité de MontpellierLaboratoire de Physique ThéoriqueSonoma State UniversityStockholm UniversityAlbaNovaFraunhofer Chalmers Research Centre for Industrial MathematicsUniversité de BordeauxLaboratoire de Physique des deux infinis BordeauxTrieste Astronomical ObservatoryNational Institute for AstrophysicsHiroshima UniversityUniversity of Alabama in HuntsvilleInstitució Catalana de Recerca i Estudis AvançatsThe Ohio State UniversityWaseda UniversityTokyo Institute of TechnologyRIKENUniversité Toulouse III - Paul SabatierCentre National d'Études SpatialesSapienza University of RomeUniversity of Maryland, College ParkIstituto Nazionale di Fisica Nucleare, Roma Tor VergataUniversity of DenverInstitute of Space and Astronautical ScienceMax Planck Institute for Extraterrestrial PhysicsUniversität InnsbruckUniversity of California, Santa CruzKTH Royal Institute of TechnologyAmes Research CenterPurdue University NorthwestSwiss Data Science CenterConsorzio Interuniversitario Fisica SpazialeUniversity of Rome Tor Vergata
Une affiliation ne permet pas de déduire la nationalité d’un auteur.
Les sujets associés
Astrophysics and Cosmic PhenomenaRadio Astronomy Observations and TechnologyDark Matter and Cosmic Phenomena