An upper limit to the linear X-ray polarization of Sco X-1
نویسندگان
چکیده
منابع مشابه
X-ray Emitting Pms Stars in Upper Sco-cen: the X-ray Faint Population
We have performed an X-ray-based survey of the upper Sco-Cen star forming region, combining a deep ROSAT HRI pointing performed explicitly for this purpose with shallower ROSAT PSPC and HRI pointings from the public archive. Tens of X-ray sources are detected, down to limiting X-ray luminosities approximately one order of magnitude fainter that previously reported (on the basis of Einstein IPC ...
متن کاملAn X-ray study of the PMS population of the Upper Sco-Cen association
We have searched for low-mass pre-main-sequence stars in the nearby Upper Sco-Cen star-forming region using ROSAT observations analyzed with an innovative source detection method based on wavelet transforms. In a 5.2 ksec ROSAT PSPC image we find 32 sources down to a limiting flux of 3.9 10−14 erg cm−2 s−1. In two HRI observations that cover with greater sensitivity approximately one-third of t...
متن کاملQuasi - Periodic X - ray Oscillations in the Source Sco X - 1
The RXTE observations of Scorpius X-1 in 1996–1999 are presented. The properties of its quasi-periodic Xray oscillations are studied in detail. The results obtained are used for analysis in terms of the transition-layer model (TLM) and the relativistic-precession model (RPM) for a slowly rotating neutron star. Theoretical predictions of the two models are compared and their self-consistency is ...
متن کاملHEXTE STUDIES OF SCO X–1 SPECTRA: DETECTIONS OF HARD X–RAY TAILS BEYOND 200 keV
Using the HEXTE experiment on-board the RXTE satellite, we performed a search for hard X–ray tails in Sco X–1 spectra. We found strong evidence for the presence of such a non–thermal component on several occasions. Using the PCA/RXTE we were able to track the position of the source along the Z diagram, and we observed that the presence of the hard X–ray tail is not confined to a particular regi...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1977
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/179.3.303