Search

We present an application of the Gabor transform to Scorpius X-1 data obtained using the CGRO BATSE Spectroscopy Detectors (SDs). Two types of data are obtained with the BATSE SDs. The first set consists of the high S/N step fluxes obtained using the Earth-occultation method (see McNamara et al. these proceedings). The second (much larger) set is the 2.048 second time resolution raw flux data obtained between rise and set of Sco X-1. It is this latter set of data for which the Gabor transform is applicable. In this poster we present initial progress towards analysis of the substantial amount (107 points) of 2.048 second time resolution data.

We have completed an internal calibration of 4.4 years of BATSE 10–20 keV SD data for Sco X-1. The resulting light curve shows variations on time scales from hours to weeks. A full description of the calibration used in arriving at this light curve has been submitted to the ApJ Supplement (McNamara et al. 1997). Fourier transform analysis of the resulting light curve found no significant periodicities on these time frames. Further period searches using short blocks of SD data, and the Gabor transform, is discussed in a companion paper by Mason et al. We have compared the BATSE SD Sco X-1 10–20 keV light curve to those produced by other missions/instruments and find that the amplitude of the variability of Sco X-1 increases with increasing energy. This result supports the suggestion of Mason et al. (1997a,b) that some positionally consistent catalogued gamma-ray bursts originate from Sco X-1 and Cyg X-1.