C
C. Pittori
Researcher at INAF
Publications - 375
Citations - 10620
C. Pittori is an academic researcher from INAF. The author has contributed to research in topics: Blazar & Gamma ray. The author has an hindex of 55, co-authored 358 publications receiving 9784 citations. Previous affiliations of C. Pittori include Sapienza University of Rome & ASTRON.
Papers
More filters
Journal ArticleDOI
The spectral energy distribution of fermi bright blazars
A. A. Abdo,A. A. Abdo,Markus Ackermann,Ivan Agudo,Marco Ajello,Hugh D. Aller,Margo F. Aller,Emmanouil Angelakis,A. A. Arkharov,Magnus Axelsson,Magnus Axelsson,Uwe Bach,Luca Baldini,Jean Ballet,Guido Barbiellini,Denis Bastieri,B. M. Baughman,Keith Bechtol,Ronaldo Bellazzini,Erika Benítez,Andrei Berdyugin,B. Berenji,Roger Blandford,E. D. Bloom,Markus Boettcher,Emanuele Bonamente,A. W. Borgland,Johan Bregeon,A. Brez,M. Brigida,P. Bruel,T. H. Burnett,David N. Burrows,S. Buson,G. A. Caliandro,L. Calzoletti,R. A. Cameron,M. Capalbi,P. A. Caraveo,D. Carosati,J. M. Casandjian,E. Cavazzuti,C. Cecchi,Omer Celik,Omer Celik,E. Charles,Sylvain Chaty,A. Chekhtman,A. Chekhtman,Wen Ping Chen,James Chiang,G. Chincarini,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,S. Colafrancesco,L. R. Cominsky,Jan Conrad,Jan Conrad,L. Costamante,S. Cutini,F. D'Ammando,R. Deitrick,V. D'Elia,Charles D. Dermer,A. De Angelis,F. de Palma,Seth Digel,I. Donnarumma,E. Do Couto E Silva,Persis S. Drell,R. Dubois,Deborah Dultzin,D. Dumora,A. D. Falcone,C. Farnier,C. Favuzzi,S. J. Fegan,W. B. Focke,E. Forné,P. Fortin,Marco Frailis,Lars Fuhrmann,Yasushi Fukazawa,Stefan Funk,P. Fusco,José L. Gómez,F. Gargano,Dario Gasparrini,Neil Gehrels,S. Germani,B. Giebels,Nicola Giglietto,Paolo Giommi,F. Giordano,A. Giuliani,T. Glanzman,G. Godfrey,I. A. Grenier,Caryl Gronwall,J. E. Grove,L. Guillemot,L. Guillemot,Sylvain Guiriec,Mark Gurwell,D. Hadasch,Y. Hanabata,Alice K. Harding,M. Hayashida,E. Hays,S. E. Healey,Jochen Heidt,David Hiriart,D. Horan,E. A. Hoversten,R. E. Hughes,Ryosuke Itoh,Miranda Jackson,Miranda Jackson,Gudlaugur Johannesson,A. S. Johnson,W. N. Johnson,Svetlana G. Jorstad,Matthias Kadler,T. Kamae,Hideaki Katagiri,Jun Kataoka,Nobuyuki Kawai,J. A. Kennea,Matthew Kerr,Givi N. Kimeridze,Jürgen Knödlseder,M. L. Kocian,E. N. Kopatskaya,Ekaterina Koptelova,Tatiana S. Konstantinova,Yuri Y. Kovalev,Yu. A. Kovalev,Omar M. Kurtanidze,M. Kuss,J. Lande,Valeri M. Larionov,Luca Latronico,Paolo Leto,Elina Lindfors,Francesco Longo,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,Grzegorz Madejski,A. Makeev,A. Makeev,P. Marchegiani,Alan P. Marscher,F. E. Marshall,Walter Max-Moerbeck,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,C. Meurer,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,I. Nestoras,K. Nilsson,N. A. Nizhelsky,P. L. Nolan,J. P. Norris,E. Nuss,T. Ohsugi,Roopesh Ojha,Nicola Omodei,E. Orlando,Jonathan F. Ormes,J. P. Osborne,M. Ozaki,L. Pacciani,Paolo Padovani,C. Pagani,K. L. Page,David Paneque,J. H. Panetta,D. Parent,M. Pasanen,Vasiliki Pavlidou,V. Pelassa,M. Pepe,M. Perri,Melissa Pesce-Rollins,S. Piranomonte,F. Piron,C. Pittori,T. A. Porter,Simonetta Puccetti,Farid Rahoui,S. Rainò,C. M. Raiteri,Robert R. Rando,M. Razzano,A. Reimer,A. Reimer,Olaf Reimer,Olaf Reimer,T. Reposeur,Joseph L. Richards,Steven Ritz,L.S. Rochester,A. Y. Rodriguez,Roger W. Romani,J. A. Ros,M. Roth,P. Roustazadeh,Felix Ryde,Felix Ryde,H. F.W. Sadrozinski,A. C. Sadun,David Sánchez,A. Sander,P. M. Saz Parkinson,Jeffrey D. Scargle,A. Sellerholm,Carmelo Sgrò,M. S. Shaw,Lorand A. Sigua,E. J. Siskind,David A. Smith,P. D. Smith,Gloria Spandre,P. Spinelli,Jean-Luc Starck,Mark Stevenson,G. Stratta,M. S. Strickman,D. J. Suson,H. Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,L. O. Takalo,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,Diego F. Torres,Gino Tosti,A. Tramacere,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,V. Vasileiou,V. Vasileiou,F. Verrecchia,N. Vilchez,M. Villata,V. Vitale,A. P. Waite,Paul J. Wang,Brian L Winer,K. S. Wood,T. Ylinen,T. Ylinen,J. A. Zensus,G. V. Zhekanis,M. Ziegler +273 more
Abstract: We have conducted a detailed investigation of the broadband spectral properties of the gamma-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining our accurately estimated Fermi gamma-ray spectra with Swift, radio, infra-red, optical, and other hard X-ray/gamma-ray data, collected within 3 months of the LBAS data taking period, we were able to assemble high-quality and quasi-simultaneous spectral energy distributions (SED) for 48 LBAS blazars. The SED of these gamma-ray sources is similar to that of blazars discovered at other wavelengths, clearly showing, in the usual log nu-log nu F-nu representation, the typical broadband spectral signatures normally attributed to a combination of low-energy synchrotron radiation followed by inverse Compton emission of one or more components. We have used these SED to characterize the peak intensity of both the low-and the high-energy components. The results have been used to derive empirical relationships that estimate the position of the two peaks from the broadband colors (i.e., the radio to optical, alpha(ro), and optical to X-ray, alpha(ox), spectral slopes) and from the gamma-ray spectral index. Our data show that the synchrotron peak frequency (nu(S)(peak)) is positioned between 10(12.5) and 10(14.5) Hz in broad-lined flat spectrum radio quasars (FSRQs) and between 10(13) and 10(17) Hz in featureless BL Lacertae objects. We find that the gamma-ray spectral slope is strongly correlated with the synchrotron peak energy and with the X-ray spectral index, as expected at first order in synchrotron-inverse Compton scenarios. However, simple homogeneous, one-zone, synchrotron self-Compton (SSC) models cannot explain most of our SED, especially in the case of FSRQs and low energy peaked (LBL) BL Lacs. More complex models involving external Compton radiation or multiple SSC components are required to reproduce the overall SED and the observed spectral variability. While more than 50% of known radio bright high energy peaked (HBL) BL Lacs are detected in the LBAS sample, only less than 13% of known bright FSRQs and LBL BL Lacs are included. This suggests that the latter sources, as a class, may be much fainter gamma-ray emitters than LBAS blazars, and could in fact radiate close to the expectations of simple SSC models. We categorized all our sources according to a new physical classification scheme based on the generally accepted paradigm for Active Galactic Nuclei and on the results of this SED study. Since the LAT detector is more sensitive to flat spectrum gamma-ray sources, the correlation between nu(S)(peak) and gamma-ray spectral index strongly favors the detection of high energy peaked blazars, thus explaining the Fermi overabundance of this type of sources compared to radio and EGRET samples. This selection effect is similar to that experienced in the soft X-ray band where HBL BL Lacs are the dominant type of blazars.
Journal ArticleDOI
A general method for non-perturbative renormalization of lattice operators
Guido Martinelli,Guido Martinelli,C. Pittori,Christopher T. Sachrajda,Massimo Testa,Anastassios Vladikas +5 more
TL;DR: In this paper, a non-perturbative method for computing the renormalization constants of generic composite operators is proposed, which is intended to reduce some systematic errors, which are present when one tries to obtain physical predictions from the matrix elements of lattice operators.
Journal ArticleDOI
Discovery of powerful gamma-ray flares from the Crab Nebula
Marco Tavani,Andrea Bulgarelli,V. Vittorini,A. Pellizzoni,E. Striani,E. Striani,P. A. Caraveo,Martin C. Weisskopf,Allyn F. Tennant,G. Pucella,Alessio Trois,Enrico Costa,Y. Evangelista,C. Pittori,F. Verrecchia,E. Del Monte,Riccardo Campana,M. Pilia,M. Pilia,A. De Luca,A. De Luca,I. Donnarumma,Dieter Horns,Carlo Ferrigno,Craig O. Heinke,M. Trifoglio,Fulvio Gianotti,S. Vercellone,A. Argan,Guido Barbiellini,P. W. Cattaneo,A. W. Chen,T. Contessi,Filippo D'Ammando,G. DeParis,G. Di Cocco,G. Di Persio,Marco Feroci,Arnaud Ferrari,M. Galli,A. Giuliani,M. Giusti,Claudio Labanti,I. Lapshov,Francesco Lazzarotto,Paolo Lipari,Francesco Longo,F. Fuschino,Martino Marisaldi,Sandro Mereghetti,Ennio Morelli,Elena Moretti,A. Morselli,Luigi Pacciani,F. Perotti,G. Piano,G. Piano,P. Picozza,P. Picozza,M. Prest,Massimo Rapisarda,A. Rappoldi,Alda Rubini,S. Sabatini,S. Sabatini,Paolo Soffitta,E. Vallazza,A. Zambra,D. Zanello,F. Lucarelli,P. Santolamazza,P. Giommi,L. Salotti,Giovanni F. Bignami +73 more
TL;DR: The detection of strong gamma-ray flares observed by the AGILE satellite in September 2010 and October 2007 challenge standard models of nebular emission and require power-law acceleration by shock-driven plasma wave turbulence within an approximately 1-day time scale.
Journal ArticleDOI
The AGILE Mission
Marco Tavani,Guido Barbiellini,A. Argan,F. Boffelli,Andrea Bulgarelli,P. A. Caraveo,P. W. Cattaneo,A. W. Chen,V. Cocco,Enrico Costa,Filippo D'Ammando,E. Del Monte,G. De Paris,G. Di Cocco,G. Di Persio,I. Donnarumma,Y. Evangelista,Marco Feroci,Arnaud Ferrari,M. Fiorini,F. Fornari,F. Fuschino,T. Froysland,Massimo Frutti,M. Galli,Fulvio Gianotti,A. Giuliani,Claudio Labanti,I. Lapshov,Francesco Lazzarotto,F. Liello,Paolo Lipari,Francesco Longo,E. Mattaini,Martino Marisaldi,M. Mastropietro,A. Mauri,F. Mauri,Sandro Mereghetti,Ennio Morelli,A. Morselli,Luigi Pacciani,A. Pellizzoni,F. Perotti,G. Piano,P. Picozza,C. Pontoni,Geiland Porrovecchio,M. Prest,G. Pucella,Massimo Rapisarda,A. Rappoldi,E. Rossi,Alda Rubini,Paolo Soffitta,Alessandro Traci,M. Trifoglio,Alessio Trois,E. Vallazza,S. Vercellone,V. Vittorini,A. Zambra,D. Zanello,C. Pittori,B. Preger,P. Santolamazza,F. Verrecchia,P. Giommi,S. Colafrancesco,Angelo Antonelli,S. Cutini,Dario Gasparrini,S. Stellato,G. Fanari,R. Primavera,F. Tamburelli,F. Viola,G. Guarrera,L. Salotti,F. D'Amico,E. Marchetti,M. Crisconio,Paolo Sabatini,G. Annoni,S. Alia,Antonio Francesco Longoni,R. Sanquerin,M. Battilana,P. Concari,E. Dessimone,R. Grossi,A. Parise,F. Monzani,E. Artina,R. Pavesi,G. Marseguerra,L. Nicolini,L. Scandelli,L. Soli,V. Vettorello,E. Zardetto,A. Bonati,L. Maltecca,E. D'Alba,M. Patané,G. Babini,F. Onorati,L. Acquaroli,M. Angelucci,B. Morelli,C. Agostara,M. Cerone,A. Michetti,P. Tempesta,S. D'Eramo,F. Rocca,Franco Giannini,G. Borghi,B. Garavelli,M. Conte,M. Balasini,Ivan Ferrario,M. Vanotti,E. Collavo,M. Giacomazzo +124 more
TL;DR: AGILE as mentioned in this paper is an Italian Space Agency mission dedicated to observing the gamma-ray universe, which was successfully launched on 2007 April 23 from the Indian base of Sriharikota and was inserted in an equatorial orbit with very low particle background.
Journal ArticleDOI
Neutral Pion Emission from Accelerated Protons in the Supernova Remnant W44
A. Giuliani,M. Cardillo,M. Cardillo,Marco Tavani,Yasuo Fukui,Satoshi Yoshiike,Kazufumi Torii,Gloria Mabel Dubner,G. Castelletti,Guido Barbiellini,Andrea Bulgarelli,P. A. Caraveo,Enrico Costa,P. W. Cattaneo,A. W. Chen,T. Contessi,E. Del Monte,I. Donnarumma,Y. Evangelista,Marco Feroci,Fulvio Gianotti,Francesco Lazzarotto,F. Lucarelli,Francesco Longo,Martino Marisaldi,Sandro Mereghetti,Luigi Pacciani,A. Pellizzoni,G. Piano,P. Picozza,C. Pittori,G. Pucella,Massimo Rapisarda,A. Rappoldi,S. Sabatini,Paolo Soffitta,E. Striani,M. Trifoglio,Alessio Trois,S. Vercellone,F. Verrecchia,V. Vittorini,Sergio Colafrancesco,Paolo Giommi,Giovanni F. Bignami +44 more
TL;DR: In this article, the AGILE gamma-ray observations in the energy range 50 MeV-10 GeV of the supernova remnant (SNR) W44, one of the most interesting systems for studying cosmic-ray production, were presented.