2010ApJ...721..843A

Query : 2010ApJ...721..843A

2010ApJ...721..843A - Astrophys. J., 721, 843-855 (2010/September-3)

Magic constraints on γ-ray emission from Cygnus X-3.

ALEKSIC J., ANTONELLI L.A., ANTORANZ P., BACKES M., BAIXERAS C., BARRIO J.A., BASTIERI D., BECERRA GONZALEZ 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., DOMINGUEZ A., DOMINIS PRESTER D., DORNER D., DORO M., ELSAESSER D., ERRANDO M., FERENC D., FONSECA M.V., FONT L., GARCIA LOPEZ R.J., GARCZARCZYK M., GAUG M., GODINOVIC N., GOEBEL F., HADASCH D., HERRERO A., HILDEBRAND D., HOHNE-MONCH D., HOSE J., HRUPEC D., HSU C.C., JOGLER T., KLEPSER S., KRAHENBUHL T., KRANICH D., LA BARBERA A., LAILLE A., LEONARDO E., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ M., LORENZ E., MAJUMDAR P., MANEVA G., MANKUZHIYIL N., MANNHEIM K., MARASCHI L., MARIOTTI M., MARTINEZ M., MAZIN D., MEUCCI M., MIRANDA J.M., MIRZOYAN R., MIYAMOTO H., MOLDON 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., PEGNA R.G., PEREZ-TORRES M.A., PERSIC M., PERUZZO L., PRADA F., PRANDINI E., PUCHADES N., PULJAK I., REICHARDT I., RHODE W., RIBO M., RICO J., RISSI M., RUGAMER S., SAGGION A., SAITO K., SAITO T.Y., SALVATI M., SANCHEZ-CONDE M., SATALECKA K., SCALZOTTO V., SCAPIN V., SCHULTZ C., SCHWEIZER T., SHAYDUK M., SHORE S.N., SIERPOWSKA-BARTOSIK A., SILLANPAA A., SITAREK J., SOBCZYNSKA D., SPANIER F., SPIRO S., STAMERRA A., STEINKE B., STRUEBIG J.C., SURIC T., TAKALO L., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESCARO D., TESHIMA M., TORRES D.F., VANKOV H., WAGNER R.M., WEITZEL Q., ZABALZA V., ZANDANEL F., ZANIN R. (The MAGIC Collaboration), BULGARELLI A., MAX-MOERBECK W., PIANO G., POOLEY G., READHEAD A.C.S., RICHARDS J.L., SABATINI S., STRIANI E., TAVANI M. and TRUSHKIN S.

Abstract (from CDS):

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 2.2x10–12 photons/cm2/s (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.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - binaries: general - gamma rays: general - methods: observational - X-rays: binaries

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 903 2
2 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 852 0
3 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 613 2
4 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
5 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
6 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 2035 2
7 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0

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