Magic constraints on Gamma-ray emission from Cygnus X-3
Abstract
Cygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy gamma rays (above 100 MeV). However, many models also predict a very high energy (VHE) emission (above hundreds of GeV) when the source displays relativistic persistent jets or transient ejections. Therefore, detecting such emission would improve the understanding of the jet physics. The imaging atmospheric Cherenkov telescope MAGIC observed Cygnus X-3 for about 70 hours between 2006 March and 2009 August in different X-ray/radio spectral states and also during a period of enhanced gamma-ray emission. MAGIC found no evidence for a VHE signal from the direction of the microquasar. An upper limit to the integral flux for energies higher than 250 GeV has been set to 2.2 x 10-12 photons cm-2 s-1 (95% confidence level). This is the best limit so far to the VHE emission from this source. The non-detection of a VHE signal during the period of activity in the high-energy band sheds light on the location of the possible VHE radiation favoring the emission from the innermost region of the jets, where absorption is significant. The current and future generations of Cherenkov telescopes may detect a signal under precise spectral conditions.
Cite
@article{arxiv.1005.0740,
title = {Magic constraints on Gamma-ray emission from Cygnus X-3},
author = {J. Aleksić and L. A. Antonelli and P. Antoranz and M. Backes and C. Baixeras and J. A. Barrio and D. Bastieri and J. Becerra González and W. Bednarek and A. Berdyugin and K. Berger and E. Bernardini and A. Biland and O. Blanch and R. K. Bock and A. Boller and G. Bonnoli and P. Bordas and D. Borla Tridon and V. Bosch-Ramon and D. Bose and I. Braun and T. Bretz and D. Britzger and M. Camara and E. Carmona and A. Carosi and P. Colin and J. L. Contreras and J. Cortina and M. T. Costado and S. Covino and F. Dazzi and A. De Angelis and E. De Cea del Pozo and B. De Lotto and M. De Maria and F. De Sabata and C. Delgado Mendez and M. Doert and A. Domínguez and D. Dominis Prester and D. Dorner and M. Doro and D. Elsaesser and M. Errando and D. Ferenc and M. V. Fonseca and L. Font and R. J. García López and M. Garczarczyk and M. Gaug and N. Godinovic and F. Göebel and D. Hadasch and A. Herrero and D. Hildebrand and D. Höhne-Mönch and J. Hose and D. Hrupec and C. C. Hsu and T. Jogler and S. Klepser and T. Krähenbühl and D. Kranich and A. La Barbera and A. Laille and E. Leonardo and E. Lindfors and S. Lombardi and F. Longo and M. López and E. Lorenz and P. Majumdar and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and M. Mariotti and M. Martínez and D. Mazin and M. Meucci and J. M. Miranda and R. Mirzoyan and H. Miyamoto and J. Moldón and M. Moles and A. Moralejo and D. Nieto and K. Nilsson and J. Ninkovic and R. Orito and I. Oya and S. Paiano and R. Paoletti and J. M. Paredes and S. Partini and M Pasanen and D. Pascoli and F. Pauss and R. G. Pegna and M. A. Perez-Torres and M. Persic and L. Peruzzo and F. Prada and E. Prandini and N. Puchades and I. Puljak and I. Reichardt and W. Rhode and M. Ribó and J. Rico and M Rissi and S. Rügamer and A. Saggion and K. Saito and T. Y. Saito and M. Salvati and M. Sánchez-Conde and K. Satalecka and V. Scalzotto and V. Scapin and C. Schultz and T. Schweizer and M. Shayduk and S. N. Shore and A. Sierpowska-Bartosik and A. Sillanpää and J. Sitarek and D. Sobczynska and F. Spanier and S. Spiro and A. Stamerra and B. Steinke and J. C. Struebig and T. Suric and L. Takalo and F. Tavecchio and P. Temnikov and T. Terzic and D. Tescaro and M. Teshima and D. F. Torres and H. Vankov and R. M. Wagner and Q. Weitzel and V. Zabalza and F. Zandanel and R. Zanin and A. Bulgarelli and W. Max-Moerbeck and G. Piano and G. Pooley and A. C. S. Readhead and J. L. Richards and S. Sabatini and E. Striani and M. Tavani and S. Trushkin},
journal= {arXiv preprint arXiv:1005.0740},
year = {2014}
}
Comments
14 pages, 11 figures, This manuscript has been accepted by ApJ (2010)