Bibcode
Aleksić, J.; Antonelli, L. A.; Antoranz, P.; Backes, M.; Baixeras, C.; Barrio, J. A.; Bastieri, D.; Becerra González, J.; Bednarek, W.; Berdyugin, A.; Berger, K.; Bernardini, E.; Biland, A.; Blanch, O.; Bock, R. K.; Boller, A.; Bonnoli, G.; Bordas, P.; Borla Tridon, D.; Bosch-Ramon, V.; Bose, D.; Braun, I.; Bretz, T.; Britzger, D.; Camara, M.; Carmona, E.; Carosi, A.; Colin, P.; Contreras, J. L.; Cortina, J.; Costado, M. T.; Covino, S.; Dazzi, F.; De Angelis, A.; De Cea del Pozo, E.; De Lotto, B.; De Maria, M.; De Sabata, F.; Delgado Mendez, C.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Elsaesser, D.; Errando, M.; Ferenc, D.; Fonseca, M. V.; Font, L.; García López, R. J.; Garczarczyk, M.; Gaug, M.; Godinovic, N.; Göebel, F.; Hadasch, D.; Herrero, A.; Hildebrand, D.; Höhne-Mönch, D.; Hose, J.; Hrupec, D.; Hsu, C. C.; Jogler, T.; Klepser, S.; Krähenbühl, T.; Kranich, D.; La Barbera, A.; Laille, A.; Leonardo, E.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; Lorenz, E.; Majumdar, P.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Miyamoto, H.; Moldón, J.; Moles, M.; Moralejo, A.; Nieto, D.; Nilsson, K.; Ninkovic, J.; Orito, R.; Oya, I.; Paiano, S.; Paoletti, R.; Paredes, J. M.; Partini, S.; Pasanen, M.; Pascoli, D.; Pauss, F. et al.
Bibliographical reference
The Astrophysical Journal, Volume 721, Issue 1, pp. 843-855 (2010).
Advertised on:
9
2010
Journal
Citations
57
Refereed citations
34
Description
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 γ 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 hr between 2006 March
and 2009 August in different X-ray/radio spectral states and also during
a period of enhanced γ-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
× 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.
Related projects
Particle Astrophysics
The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with
Ramón
García López