Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1769217 | Advances in Space Research | 2006 | 7 Pages |
Abstract
Sco X-1 is a low mass X-ray binary system and with the recent observations of a resolved radio jet, the source has been included in the list of galactic microquasars. The observed spectral data in the 2-20Â keV energy band fits a thermal emission. Above 20Â keV, a hard tail has been reported on occasions. During our continuing balloon borne X-ray survey in the 20-200Â keV region using high sensitivity Large Area Scintillation counter Experiment, Sco X-1 was observed on two different occasions. Even though the total X-ray luminosity of the source was different, the spectral nature of the source did not show any variation. The presence of hard X-ray flux is unmistakable. We present the spectral and temporal data in the hard X-ray band and discuss the results in terms of geometrical characteristics of X-ray source and its observed temporal properties. We note that the jet activity is similar to the microquasars, however, the absence of the large magnitude abrupt changes in X-ray light curve compared to GRS1915Â +Â 105 suggest that the quasar-like behaviour is at a nano scale.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
R.K. Manchanda,