next up previous contents
Next: QUALITY FLAG Up: PIPELINE PROCESSING Previous: Spectral Fits

Light Curves

Light curves have been extracted, from the same data cubes as have the spectral data (see section 2.6); in the energy bands 2-6, 6-7, 7-17 and 2-17 keV. These bands cover the soft X-ray emission, the iron Kformula line emission, the hard X-ray continuum and the full energy band. There are light curves and light curve images for both the top- and mid-layers (see figure 6). In addition, the intrinsic variability (total variance minus statistical noise) is given in the databases as


formula (3)

where xi is the count rate for bin i, formula is the mean count rate during the observation and formula is the variance for bin i).

The format of the light curve files follows OGIP FITS conventions (Angelini, Pence & Tennant 1994) and they can be used within the XRONOS timing analysis package (Stella & Angellini 1993), which is part of the XANADU suite of software.



Lorella Angelini
1999-05-29