منابع مشابه
Rapid expansion in the VLBI structure of LSI + 61 ◦ 303
We present the results of global VLBI observations at 6 cm wavelength of the X-ray binary LSI+61◦303 made at epoch 1992.4. During the course of our 24 hour VLBI observing session, the integrated flux measured simultaneously with the VLA indicated that the source was experiencing a minor flare, with the total flux rising and falling by ∼ 12 mJy. Our VLBI observations indicate that this brighteni...
متن کاملINTEGRAL and XMM - Newton observations of LSI + 61 ◦ 303
LSI +61 303 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 Γ ≃ 1.5) during the orbital phases of both high and low X-ray flux. However, the spectrum softe...
متن کاملLong - Term Flux Monitoring of LSI + 61 303 at 2 . 25 and 8 . 3
LSI +61 303 is an exotic binary system consisting of a 10 M B star and a compact object which is probably a neutron star. The system is associated with the interesting radio source GT 0236+610 that exhibits bright radio outbursts with a period of 26.5 days. We report the results of continuous daily radio interferometric observations of GT 0236+610 at 2.25 and 8.3 GHz from 1994 January to 1996 F...
متن کاملINTEGRAL and XMM - Newton observations of a micro - blazar LSI + 61 ◦ 303
LSI +61 303 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 Γ ≃ 1.5) during the orbital phases of both high and low X-ray flux. However, the spectrum softe...
متن کاملOptical and infrared modulation in the Be - star / X - ray source LSI + 61 ◦ 303
The Be star X-ray source LSI+61◦303 is found to show optical and infrared modulation with its orbital period. We show that this modulation is due to radiation from a shock produced by the companion to the Be star, while it passes through the gas envelope of the Be star in its binary motion.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1983
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/203.3.801