REAPPROACHING THE SPIN ESTIMATE OF GX 339-4
نویسندگان
چکیده
منابع مشابه
The Off State of GX 339 – 4
We report BeppoSAX and optical observations of the black hole candidate GX339– 4 during its X-ray ‘off’ state in 1999. The broad-band (0.8–50 keV) X-ray emission can be fitted by a single power law with spectral index, α ∼ 1.6. The observed luminosity is 6.6 × 10 erg s in the 0.5–10 keV band, which is at the higher end of the flux distribution of black hole soft X-ray transients in quiescence, ...
متن کاملMOST Radio Monitoring of GX 339 − 4
The Molonglo Observatory Synthesis Telescope (MOST) has been monitoring the candidate Galactic black hole binary system GX339−4 at 843 MHz since 1994 April. We present the results of this program up to 1997 February and show a possible correlation between radio and X-ray light curves.
متن کاملOSSE Observations of GX 339 � 4
The Oriented Scintillation Spectrometer Experiment on the Compton Gamma Ray Observatory observed the Galactic black hole candidate GX 339?4 as a target of opportunity in 1991 September, in response to the outburst reported by BATSE. We report here on energy spectra in the 50 keV to 10 MeV range obtained by OSSE. The source was detected from 50 to 400 keV at a level relative to the Crab nebula o...
متن کاملInitial Measurements of Black Hole Spin in Gx 339−4 from Suzaku Spectroscopy
We report on a deep Suzaku observation of the stellar-mass black hole GX 339−4 in outburst. A clear, strong, relativistically-shaped iron emission line from the inner accretion disk is observed. The broad-band disk reflection spectrum revealed is one of the most sensitive yet obtained from an accreting black hole. We fit the Suzaku spectra with a physically–motivated disk reflection model, blur...
متن کاملThe Distance and Interstellar Sight Line to Gx 339 – 4
The distance to the black hole binary GX 339–4 remains a topic of debate. We examine high-resolution optical spectra of the Na D lines resolving the velocity structure along the line of sight. We find this to be complex, with at least nine components, mostly blue-shifted, spanning a velocity range of nearly 200 km s −1. The presence of components with a large blue-shift rules out a nearby locat...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/806/2/262