Confirmation of periodic radio outbursts from LSI + 61 303 GT 0236 + 61
نویسندگان
چکیده
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 کاملThe peak radio emission phase variations in the Be - star / X - ray source LSI + 61 ◦ 303
The orbital phase of the peak radio emission in the Be star/X-ray source LSI +61◦ 303 shows variations ranging from 0.5 to 0.9, the weaker emissions showing the larger phase. The delay in attaining peak emission is explained as due to the time required for the relativistic gas bubble responsible for the radio emission, expanding in the hot wind of the Be star, to become large enough in size to ...
متن کاملγ - ray emission from microquasars : a numerical model for LSI + 61 ◦ 303
We explore the possible association between the microquasar LSI +61303 and the EGRET source 2CG 135+01/3EG J0241+6103 by studying, with a detailed numerical model, whether this system can produce the emission and the variability detected by EGRET (>100 MeV) through inverse Compton (IC) scattering. Our numerical approach considers a population of relativistic electrons entrained in a cylindrical...
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...
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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/203.3.791