X-Ray and Optical Observations of the X-Ray Source EX0020528+1454.8
نویسندگان
چکیده
منابع مشابه
Simultaneous optical polarimetry and X-ray observations
CP Tuc (AX J2315–592) shows a dip in X-rays which lasts for approximately half the binary orbit and is deeper in soft X-rays compared with hard X-rays. It has been proposed that this dip is due to the accretion stream obscuring the accretion region from view. If CP Tuc was a polar, as has been suggested, then the length of such a dip would make it unique amongst polars since in those polars in ...
متن کاملImaging X-ray, Optical, and Infrared Observations of the Transient Anomalous X-ray Pulsar Xte
We report X-ray imaging, timing, and spectral studies of XTE J1810−197, a 5.54 s pulsar discovered by Ibrahim et al. (2003) in recent RXTE observations. In a set of short exposures with the High Resolution Camera on-board the Chandra X-ray Observatory we detect a strongly modulated signal (55±4% pulsed fraction) with the expected period located at (J2000) 180951.08, −194351. 7, with a uncertain...
متن کاملX - ray observations of NGC 1365 : time - resolved eclipse of the X - ray source
We present an extraordinary variation of the X-ray spectrum of the obscured AGN in NGC 1365, which was observed by Chandra to change from Compton-thin to Compton-thick and back to Compton-thin in four days. This fast variation imply a a size of ∼ 10 14 cm for the emitting region, and an extremely compact size (∼ 10 16 cm) of the clumpy circumnuclear absorber.
متن کاملX-ray and Optical Observations of the Star
We present a ROSAT High Resolution Imager (HRI) observation of the star forming region NGC 2264. The analysis has detected more than 40 X-ray sources with Lx in the range 10 30 ?10 31 erg/sec. The high spatial resolution of the detector allows us to resolve sources that were confused in previous IPC and PSPC observations of the same region. Moreover, we have performed CCD photometric observatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1987
ISSN: 0252-9211
DOI: 10.1017/s0252921100105561