Variable very-high-energy gamma-ray emission from the microquasar LS I +61 303.

  title={Variable very-high-energy gamma-ray emission from the microquasar LS I +61 303.},
  author={Justin E. Albert and Ester Aliu and Hanspeter Anderhub and P. Antoranz and Ariel Armada and M. Asensio and C. Baixeras and J. B. Marques Barrio and Mitch Bartelt and Hendrik Bartko and Denis Bastieri and Sathyanarayan Reddy Bavikadi and Włodek Bednarek and K{\'e}vin Berger and Ciro Bigongiari and A. Biland and Erica Bisesi and R. K. Bock and Pol Bordas and Valent'i Bosch-Ramon and Thomas Bretz and Ilia Britvitch and Miguel C{\'a}mara and Enrique Casta{\~n}o Carmona and Ashot Chilingarian and Stefano Ciprini and Jose Antonio Coarasa and S. C. Commichau and Jorgelina Lupiano Contreras and Juan Manuel Gonz{\'a}lez Cortina and Valentin Curtef and Varuzhan Danielyan and Francesco Dazzi and Anna De Angelis and R de los Reyes and B. De Lotto and Eva Domingo-Santamar{\'i}a and Doroth{\'e}e Dorner and Michele Doro and Manel Errando and M Fagiolini and D. Ferenc and Enrique Fernandez and Roger Firpo and Jose Flix and M. V. Fonseca and Ll. Font and Moritz Fuchs and Nicola Galante and Markus Garczarczyk and R. Ganupati and Maria Giller and Florian Goebel and Diana Hakobyan and Morihiro Hayashida and Thomas Hengstebeck and Diethard H{\"o}hne and J. Hose and Chia Chen Hsu and Paula Gina Isar and P. Jacon and Oleg Kalekin and Ralf Kosyra and Daniel Kranich and Mustapha Laatiaoui and A. Laill{\'e} and T. Lenisa and Patricia Liebing and Elina Lindfors and Simone Lombardi and Francesco Longo and Jose-Luis L{\'o}pez and Mirtha L{\'o}pez and Edward Norton Lorenz and Francesca Lucarelli and Pinaki Majumdar and Galina Maneva and Klinikum Mannheim and Oriana Mansutti and Mose Mariotti and Mayerling Martinez and Kazuo Mase and Daniel Mazin and Carl-Christian Merck and Miguel {\'A}ngel Mart{\'i}nez Meucci and Michael Meyer and Jorge Miguel Miranda and Razmik Mirzoyan and Seiko Mizobuchi and Abelardo Moralejo and Kari Nilsson and Emma O{\~n}a-Wilhelmi and R. Mu{\~n}oz Ordu{\~n}a and Neil Otte and Igor Oya and David Paneque and Riccardo Paoletti and Josep M. Paredes and Mikko Pasanen and D. Pascoli and Felicitas Pauss and N. Pavel and R. G. Pegna and Massimo Persic and Luca Peruzzo and Andrea Piccioli and M. Poller and Gregory Pooley and Elisa Prandini and A. Raymers and Wolfgang Rhode and Marc Ribo and Javier Gonz{\'a}lez Rico and B. Riegel and Michael Rissi and Anthony Robert and Gustavo Esteban Romero and S. R{\"u}gamer and Antonio Saggion and Alex S{\'a}nchez and Paolo Sartori and Villi Scalzotto and Valeria Scapin and Ralf Schmitt and Thomas Schweizer and Maxim Shayduk and Keisuke Shinozaki and Steven N. Shore and N{\'u}ria Sidro and Atte J. Sillanp{\"a}{\"a} and Dorota Sobczyńska and Antonio Stamerra and Laurel Stark and L. O. Takalo and Petar Temnikov and Diego Tescaro and Mitsuhiro Teshima and Nadia Tonello and Aldemar Torres and Diego Amadeu F. Torres and Nicola Turini and H. Vankov and Vincenzo Vitale and Robert M. Wagner and Tadeusz Wibig and Werner Wittek and Roberta Zanin and J. Zapatero},
  volume={312 5781},
Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics of relativistic jets. We report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LS I 61 + 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, which suggests that the emission is periodic. The strongest gamma-ray emission is not observed when the two… CONTINUE READING

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Kniffen et al., Astrophys

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