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MAGIC Upper Limits for two Milagro-detected, Bright Fermi Sources in the Region of SNR G65.1+0.6

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arxiv 1007.3359 v2 pith:3XTSARVZ submitted 2010-07-20 astro-ph.HE

MAGIC Upper Limits for two Milagro-detected, Bright Fermi Sources in the Region of SNR G65.1+0.6

J. Aleksi\'c , L. A. Antonelli , P. Antoranz , M. Backes , J. A. Barrio , D. Bastieri , J. Becerra Gonz\'alez , W. Bednarek
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A. Berdyugin K. Berger E. Bernardini A. Biland O. Blanch R. K. Bock A. Boller G. Bonnoli P. Bordas D. Borla Tridon V. Bosch-Ramon D. Bose I. Braun T. Bretz M. Camara E. Carmona A. Carosi P. Colin J. L. Contreras J. Cortina S. Covino F. Dazzi A. De Angelis E. De Cea del Pozo B. De Lotto M. De Maria F. De Sabata C. DelgadoMendez A. Diago Ortega M. Doert A. Dom\'inguez D. Dominis Prester D. Dorner M. Doro D. Elsaesser M. Errando D. Ferenc M. V. Fonseca L. Font R. J. Garc\'ia L\'opez M. Garczarczyk M. Gaug G. Giavitto N. Godinovi\'c D. Hadasch A. Herrero D. Hildebrand D. H\"ohne-M\"onch J. Hose D. Hrupec T. Jogler S. Klepser T. Kr\"ahenb\"uhl D. Kranich J. Krause A. La Barbera E. Leonardo E. Lindfors S. Lombardi F. Longo M. L\'opez E. Lorenz P. Majumdar G. Maneva N. Mankuzhiyil K. Mannheim L. Maraschi M. Mariotti M. Mart\'inez D. Mazin M. Meucci J. M. Miranda R. Mirzoyan H. Miyamoto J. Mold\'on A. Moralejo D. Nieto K. Nilsson R. Orito I. Oya R. Paoletti J. M. Paredes S. Partini M. Pasanen F. Pauss R. G. Pegna M. A. Perez-Torres M. Persic L. Peruzzo J. Pochon F. Prada P. G. Prada Moroni E. Prandini N. Puchades I. Puljak I. Reichardt R. Reinthal W. Rhode M. Rib\'o J. Rico M. Rissi S. R\"ugamer A. Saggion K. Saito T. Y. Saito M. Salvati M. S\'anchez-Conde K. Satalecka V. Scalzotto V. Scapin C. Schultz T. Schweizer M. Shayduk S. N. Shore A. Sierpowska-Bartosik A. Sillanp\"a\"a J. Sitarek D. Sobczynska F. Spanier S. Spiro A. Stamerra B. Steinke J. Storz N. Strah J. C. Struebig T. Suric L. Takalo F. Tavecchio P. Temnikov T. Terzi\'c D. Tescaro M. Teshima D. F. Torres H. Vankov R. M. Wagner Q. Weitzel V. Zabalza F. Zandanel R. Zanin
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We report on the observation of the region around supernova remnant G65.1+0.6 with the stand-alone MAGIC-I telescope. This region hosts the two bright GeV gamma-ray sources 1FGL J1954.3+2836 and 1FGL J1958.6+2845. They are identified as GeV pulsars and both have a possible counterpart detected at about 35 TeV by the Milagro observatory. MAGIC collected 25.5 hours of good quality data, and found no significant emission in the range around 1 TeV. We therefore report differential flux upper limits, assuming the emission to be point-like (<0.1 deg) or within a radius of 0.3 deg. In the point-like scenario, the flux limits around 1 TeV are at the level of 3 % and 2 % of the Crab Nebula flux, for the two sources respectively. This implies that the Milagro emission is either extended over a much larger area than our point spread function, or it must be peaked at energies beyond 1 TeV, resulting in a photon index harder than 2.2 in the TeV band.

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