Search for Very High-energy Emission from the Millisecond Pulsar PSR J0218+4232

  title={Search for Very High-energy Emission from the Millisecond Pulsar PSR J0218+4232},
  author={V. A. Acciari and Stefano Ansoldi and Lucio Angelo Antonelli and A. Arbet Engels and M. Artero and Katsuaki Asano and D. Baack and A. Babi'c and A. Baquero and Ulisses Barres DE Almeida and J. A. Barrio and I. Batkovi'c and J. Becerra Gonz'alez and W. Bednarek and Lorenzo Bellizzi and Elisa Bernardini and Mar{\'i}a Isabel Bernardos and Alessio Berti and J{\"u}rgen Besenrieder and W. Bhattacharyya and Ciro Bigongiari and Adrian Biland and O. Blanch and Giacomo Bonnoli and vZ. Bovsnjak and G. Busetto and R. Carosi and G. Ceribella and M. Cerruti and Yi Chai and Ashot A. Chilingarian and Stefan Cikota and S. M. Colak and E. Colombo and J. L. Contreras and J. Cortina and Stefano Covino and Giacomo D’Amico and Valerio D’Elia and P. Da Vela and F. Dazzi and Alessandro De Angelis and Barbara De Lotto and M. Delfino and J. Delgado and C. Delgado Mendez and Davide Depaoli and F. Di Pierro and L. Di Venere and Elia do Souto Espineira and D. Dominis Prester and A. Donini and Daniela Dorner and Michele Doro and D. Elsaesser and Vandad Fallah Ramazani and A. Fattorini and Giuseppe Ferrara and M. V. Fonseca and Ll. Font and Christian Fruck and S. Fukami and R. J. Garc'ia L'opez and Markus Garczarczyk and Sargis Gasparyan and Markus Gaug and Nicola Giglietto and Francesco Giordano and P. Gliwny and Nikola Godinovi'c and J. G. Green and D. Green and D. Hadasch and A. Hahn and Lea Heckmann and J. Herrera and John Hoang and D. Hrupec and Moritz Hutten and T. Inada and Susumu Inoue and K. Ishio and Yukio Iwamura and I. Dom'inguez Jim'enez and Jenni Jormanainen and L. Jouvin and Yuki Kajiwara and Marie Karjalainen and Daniel Kerszberg and Y. Kobayashi and Hidetoshi Kubo and J. Kushida and A. Lamastra and Damir Lelas and Francesco Leone and Eila Lindfors and S. Lombardi and Francesco Longo and Rub'en L'opez-Coto and M. L'opez-Moya and Alicia L'opez-Oramas and Serena Loporchio and Bernardo M.O. Fraga and C. Maggio and Pratik Majumdar and M. Makariev and M. Mallamaci and Galina Maneva and Marina Manganaro and Karl Mannheim and L.Maraschi and Mose Mariotti and M. Mart'inez and D. Mazin and Stefano Menchiari and S. Mender and S. Mi'canovi'c and Davide Miceli and T. Miener and Milen Minev and J. M. Miranda and Razmik Mirzoyan and E. Molina and A. Moralejo and D. Morcuende and V. Moreno and E. Moretti and V. V. Neustroev and C. Nigro and Kari Nilsson and Kyoshi Nishijima and K. Noda and S. Nozaki and Y. Ohtani and T. Oka and J. Otero Santos and Simona Paiano and M. Palatiello and D. Paneque and Riccardo Paoletti and Josep Maria Paredes and Lovro Pavleti'c and Pablo Pe{\~n}il and C. Perennes and Massimo Persic and P. G. Prada Moroni and E. Prandini and C. Priyadarshi and I.Puljak and Wolfgang Rhode and Marc Rib'o and Javier Rico and Chiara Righi and A. Rugliancich and L. Saha and Narek Sahakyan and T. Saito and S. Sakurai and Konstancja Satalecka and Francesco G. Saturni and Bernd Schleicher and K. Schmidt and Thomas Schweizer and Julian Sitarek and I. vSnidari'c and D. Sobczynska and A. Spolon and A. Stamerra and D. Strom and M. Strzys and Yusuke Suda and T. Suri'c and M. Takahashi and Fabrizio Tavecchio and P. Temnikov and Tomislav Terzi'c and Masahiro Teshima and Luca Tosti and Stefano Truzzi and A. Tutone and Santiago Ubach and J. van Scherpenberg and G. Vanzo and M. Vazquez Acosta and S. Ventura and V. Verguilov and Carlo Francesco Vigorito and Vincenzo Vitale and I. Vovk and Martin Will and C. Wunderlich and Darko Zari'c and Patricia A. Caraveo and Ismael Cognard and Lucas Guillemot and A. K. Harding and J. Li and Brent Limyansky and C-Y. Ng and Diego F. Torres and P. M. Saz Parkinson Inst. de Astrof'isica de Canarias and La Laguna and Tenerife and Spain and Universita' di Udine and Infn Sezione di Trieste and Udine and Italy. and National Centre for Radio Astrophysics and Rom{\'e} and Eth Zurich and Zurich and Switzerland. and Institut de F'isica d'Altes Energies and The Barcelona Institute of Science and Technology and Bellaterra and J. Karancsi Institute for Nuclear Research and The University of Tokyo and Chiba and Japan. and Technische Universitat Dortmund and Dortmund and H Germany and Croatia Zagreb and Zagreb and Croatia. and Iparcos Institute and Emftel Department and Universidad Complutense de Madrid and Madrid and Centro Brasileiro de Pesquisas F'isicas and R. D. Janeiro and Brazil. and Universit̀a di Padova and Infn and Padova and University of Lodz and Faculty of Physics and Applied Informatics and Department of Theoretical Astrophysics and Lodz and Poland and Universit'a di Siena and Infn sez. di Pisa and Siena and Deutsches Elektronen-Synchrotron and Zeuthen and Infn Sezione di Torino and Universita' di Torino and Torino and Max-Planck-Institut fur extraterrestrische Physik and Munchen and Universita' di Pisa and Pisa and Universitat Aut'onoma de Barcelona and Iccub and IEEC-UB and Barcelona and A. Alikhanyan National Laboratory and Centro de Investigaciones Energ'eticas and Medioambientales y Tecnol'ogicas and University of Innsbruck and Innsbruck and Austria and Port d'Informaci'o Cient'ifica and Infn Bari and Dipartimento di FisicaM. Merlindell'Universita e del Politecnic Bari and Bari and Croatian Magic Consortium University of Rijeka and Dep. of Physics and Rijeka and Universitat Wurzburg and Wurzburg and Finnish Magic Consortium Finnish Centre of Astronomy with Eso and University of Turku and Turku and Finland Ruhr-Universitat Bochum and Fakultat fur Physik und Astronomie and Astronomisches Institut and Bochum and Departament de F'isica and CERES-IEEC and Universitat Aut'onoma de Barcelona and RA ArmenianMAGICGroupICRANet-ArmeniaatNAS and Croatian Magic Group University of Split and Faculty of Electrical Engineering and Mechanical Engineering and Naval Architecture and Split and Croatia Croatian Magic Group Josip Juraj Strossmayer Unive Osijek and Osijek and Japanese Magic Group Riken and Wako and Saitama and Japan Department of Physics and Kyoto University and Kyoto and Tokai University and Kanagawa and Saha Institute of Nuclear Physics and Kolkata and India. and Inst. for Nucl. Research and Nucl. Energy and Bulgarian academy of Sciences and Sof{\'i}a and Bulgaria. and Finnish Magic Group Astronomy Research Unit and University of Oulu and Oulu and Finland. and Inaf - OA Trieste and Dept. of Physics and Astronomy and University of Bologna and Infn Sezione di Perugia and Perugia and Infn Roma Tor Vergata and Roma and I-20133 Milano and Milano and Laboratoire de Physique et Chimie de l'Environnement et de l'E d'Orl'eans and Orl'eans and France and Station de radioastronomie de Nanccay and Observatoire de Paris and Nanccay and Nasa Goddard Space Flight Center and Greenbelt and Md. and Usa and Cas Key Laboratory for Research in Galaxies and Cosmology and Department of Physics Astronomy and University of Electronic Science and Technology of China and Hefei and People's Republic of China and School of Astronomy and Space Science and Santa Cruz Institute for Particle Physics and University of California at Santa Cruz and Santa Cruz and Ca and The Hong Kong and Pokfulam Road and Hong Kong and China. and Laboratory for Space Research and Institute for Space Sciences and Campus Uab and Institut d'Estudis Espacials de Catalunya and Instituci'o Catalana de Recerca i Estudis Avanccats},
  journal={The Astrophysical Journal},
PSR J0218+4232 is one of the most energetic millisecond pulsars known and has long been considered as one of the best candidates for very high-energy (VHE; >100 GeV) γ-ray emission. Using 11.5 yr of Fermi Large Area Telescope (LAT) data between 100 MeV and 870 GeV, and ∼90 hr of Major Atmospheric Gamma Imaging Cherenkov (MAGIC) observations in the 20 GeV to 20 TeV range, we searched for the highest energy γ-ray emission from PSR J0218+4232. Based on the analysis of the LAT data, we find… 



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