author={Justin E Albert and Ester Aliu and H. Anderhub and P. Antoranz and A. Armada and Mar{\'i}a Asensio and C. Baixeras and J. A. Barrio and Michael Bartelt and Hendrik Bartko and Denis Bastieri and R. Bavikadi and W. Bednarek and Karsten Berger and Ciro Bigongiari and Adrian Biland and Erica Bisesi and R. K. Bock and Thomas Bretz and Ilia Britvitch and M. Camara and Ashot A. Chilingarian and S. Ciprini and J. A. Coarasa and Sebastian Commichau and Jose Luis Contreras and J. Cortina and Valentin Curtef and Varuzhan Danielyan and Francesco Dazzi and Alessandro De Angelis and Raquel de los Reyes and Barbara De Lotto and Eva Domingo-Santamarı́a and Daniela Dorner and Michele Doro and M. Errando and Michela Fagiolini and Daniel Ferenc and Enrique Fern{\'a}ndez and Roger Firpo and Josep Flix and M. V. Fonseca and L. Font and Nicola Galante and M. Garczarczyk and Markus Gaug and Maria Giller and Florian Goebel and D. Hakobyan and Morihiro Hayashida and Thomas Hengstebeck and David Hohne and Juergen Hose and P. Jacon and O. Kalekin and Daniel Kranich and A. Laille and T. Lenisa and Patricia Liebing and E. Lindfors and Francesco Longo and J. M. Lopez and M. Rutz Lopez and Eckart Lorenz and Fabrizio Lucarelli and P. Majumdar and Galina Maneva and Karl Mannheim and Mose Mariotti and M. Mart{\'i}nez and Keiichi Mase and D. Mazin and M. Meucci and Manuel Meyer and J. M. Miranda and R. Mirzoyan and Satoko Mizobuchi and A. Moralejo and K. Nilsson and Emma de O{\~n}a-Wilhelmi and Raul Orduna and N. Otte and Igor Oya and D. Paneque and Riccardo Paoletti and Mikko Pasanen and Donatella Pascoli and Felicitas Pauss and Nikolaj A. Pavel and R. G. Pegna and Massimo Persic and L. Peruzzo and Alessio Piccioli and E. Prandini and J. Rico and Wolfgang Rhode and B. Riegel and Michael Rissi and Anne Robert and Stefan Rugamer and Antonio Saggion and A. S{\'a}nchez and P. Sartori and Villi Scalzotto and Robert Schmitt and Thomas Schweizer and Maxim Shayduk and Kenji Shinozaki and Steven N. Shore and N{\'u}ria Sidro and Aimo K. Sillanpaa and D. Sobczynska and A. Stamerra and Luisa Sabrina Stark and Leo O. Takalo and P. Temnikov and Diego Tescaro and Masahiro Teshima and Nadia Tonello and Antoni Torres and Diego F. Torres and Nicola Turini and H. P. Vankov and A. A. Vardanyan and Vincenzo Vitale and R. Mark Wagner and Tadeusz Wibig and Wolfgang Wittek and J. Zapatero},
  journal={The Astrophysical Journal},
The long-duration gamma-ray burst GRB 050713a was observed by the MAGIC Telescope 40 s after the burst onset and followed up for 37 minutes, until twilight. The observation, triggered by a Swift alert, covered energies above approximate to 175 GeV. Using standard MAGIC analysis, no evidence of a gamma-ray signal was found. As the redshift of the GRB was not measured directly, the flux upper limit estimated by MAGIC is still compatible with the assumption of an unbroken power-law spectrum… Expand

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