Exosat observations of Cygnus X-2 continuum and line spectrum
Creators
- 1. Univ. of the Bosphorus, Istanbul (Turkey)
- 2. London Univ. College, Dorking (England)
- 3. Milano Universita, Milan (Italy)
- 4. CNR, Istituto di Fisica Cosmica, Milan (Italy)
Description
An analysis of five Exosat observations of Cyg X-2, taken around a full binary orbit is presented. The data were obtained using all instrumentation (1000 lines/mm Transmission Grating Spectrometer, Channel Multiplier Array + filters, Medium-Energy experiment, and Gas Scintillation Proportional Counter) simultaneously, and span the full energy range 0.5-20 keV. No clear evidence was found for a correlation of any of the source characteristics with orbital phase. During two of the observations, significant iron K emission at 6.7 keV was detected, the relative strength of which seems to correlate with total X-ray intensity during two sharp intensity dips. The previous detection of discrete emission features in the 12-19 A band with the Einstein grating is confirmed. 29 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 361
- Series
- Astrophys. J.
- Journal Page Range
- 596-606
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22020939
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- BINARY STARS; BREMSSTRAHLUNG; CORRELATIONS; COSMIC X-RAY SOURCES; DATA PROCESSING; SATELLITES; VARIABLE STARS; X-RAY SPECTRA
- Descriptors DEC
- COSMIC RAY SOURCES; ELECTROMAGNETIC RADIATION; RADIATIONS; SPECTRA; STARS