Previous abstract Next abstract

Session 104 - Accretion-Powered X-Ray Sources.
Display session, Thursday, January 18
North Banquet Hall, Convention Center

[104.06] The multi-year x-ray lightcurve of Scorpius X-1

M. Templeton, B. McNamara, T. Harrison (NMSU), B. A. Harmon (NASA/MSFC)

We present the 7-14 keV x-ray light curve of Scorpius X-1 (Sco) observed by the BATSE experiment on the Compton Gamma Ray Observatory (CGRO). Since the beginning of the mission, these data have been obtained using the occultation of Sco by the Earth. This method allows for subtraction of the x-ray background. We also present our best calibration of this data. We have determined that the response of all BATSE detectors is a complicated function of pointing angle as well as of detector characteristics, and have developed a method of calibrating all detectors into the reference frame of one single detector. We assess the statistical validity of this calibration, and provide calibrated simultaneous measurements by two detectors to determine the reliability of the calibration method. Currently, we believe that our calibration allows for reliable measurement of the 7-14 keV x-ray flux to within 10 %, and that deviations from this reliability at high flux levels may be due to color changes in the x-ray output from Sco during flaring states.

Program listing for Thursday