INTEGRAL and XMM-Newton observations of LSI+61° 303

被引：55
作者：
Chernyakova, M.
Neronov, A.
Walter, R.
机构：
[1] INTEGRAL Sci Data Ctr, CH-1290 Chavannes Des Bois, Switzerland
[2] Observ Geneva, CH-1290 Chavannes Des Bois, Switzerland
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2006年 / 372卷 / 04期
关键词：
pulsars : individual : LSI+61 degrees 303; X-rays : binaries; X-rays : individual : LSI+61 degrees 303;
D O I：
10.1111/j.1365-2966.2006.10946.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
LSI +61 degrees 303 is one of the few X-ray binaries with Be star companion from which both radio and high-energy gamma-ray emission have been observed. We present XMM-Newton and INTEGRAL observations which reveal variability of the X-ray spectral index of the system. The X-ray spectrum is hard (photon index Gamma similar or equal to 1.5) during the orbital phases of both high and low X-ray flux. However, the spectrum softens at the moment of transition from high to low X-ray state. The spectrum of the system in the hard X-ray band does not reveal the presence of a cut-off (or, at least a spectral break) at 10-60 keV energies, expected if the compact object is an accreting neutron star. The observed spectrum and spectral variability can be explained if the compact object in the system is a rotation-powered pulsar.
引用
收藏
页码：1585 / 1592
页数：8
相关论文
共 37 条
  • [1] AHARONIAN F, A A, V442, P1
  • [2] Variable very-high-energy gamma-ray emission from the microquasar LS I +61 303
    Albert, J.
    Aliu, E.
    Anderhub, H.
    Antoranz, P.
    Armada, A.
    Asensio, M.
    Baixeras, C.
    Barrio, J. A.
    Bartelt, M.
    Bartko, H.
    Bastieri, D.
    Bavikadi, S. R.
    Bednarek, W.
    Berger, K.
    Bigongiari, C.
    Biland, A.
    Bisesi, E.
    Bock, R. K.
    Bordas, P.
    Bosch-Ramon, V.
    Bretz, T.
    Britvitch, I.
    Camara, M.
    Carmona, E.
    Chilingarian, A.
    Ciprini, S.
    Coarasa, J. A.
    Commichau, S.
    Contreras, J. L.
    Cortina, J.
    Curtef, V.
    Danielyan, V.
    Dazzi, F.
    De Angelis, A.
    Reyes, R. de los
    De Lotto, B.
    Domingo-Santamaria, E.
    Dorner, D.
    Doro, M.
    Errando, M.
    Fagiolini, M.
    Ferenc, D.
    Fernandez, E.
    Firpo, R.
    Flix, J.
    Fonseca, M. V.
    Font, L.
    Fuchs, M.
    Galante, N.
    Garczarczyk, M.
    [J]. SCIENCE, 2006, 312 (5781) : 1771 - 1773
  • [3] INTEGRAL/RXTE high-energy observation of a state transition of GX 339-4
    Belloni, T
    Parolin, I
    Del Santo, M
    Homan, J
    Casella, P
    Fender, RP
    Lewin, WHG
    Méndez, M
    Miller, JM
    van der Klis, M
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 367 (03) : 1113 - 1120
  • [4] CAMPANA S, 1995, ASTRON ASTROPHYS, V297, P385
  • [5] Orbital parameters of the microquasar LS I+61 303
    Casares, J
    Ribas, I
    Paredes, JM
    Martí, J
    Allende Prieto, C
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 360 (03) : 1105 - 1109
  • [6] XMM-Newton observations of PSR B1259-63 near the 2004 periastron passage
    Chernyakova, M
    Neronov, A
    Lutovinov, A
    Rodriguez, J
    Johnston, S
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 367 (03) : 1201 - 1208
  • [7] The INTEGRAL science data centre (ISDC)
    Courvoisier, TJL
    Walter, R
    Beckmann, V
    Dean, AJ
    Dubath, P
    Hudec, R
    Kretschmar, P
    Mereghetti, S
    Montmerle, T
    Mowlavi, N
    Paltani, S
    Martinez, AP
    Produit, N
    Staubert, R
    Strong, AW
    Swings, JP
    Westergaard, NJ
    White, N
    Winkler, C
    Zdziarski, AA
    [J]. ASTRONOMY & ASTROPHYSICS, 2003, 411 (01) : L53 - L57
  • [8] DUBUS G, 2006, IN PRESS A A
  • [9] Hard spectra of X-ray pulsars from INTEGRAL data
    Filippova, EV
    Tsygankov, SS
    Lutovinov, AA
    Sunyaev, RA
    [J]. ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 2005, 31 (11): : 729 - 747
  • [10] GOLDONI P, 1995, ASTRON ASTROPHYS, V299, P751
1234