The steps to be followed to process a slew datafile are detailed below:
export SAS_ATTITUDE=RAF [sh, bash, ksh] setenv SAS_ATTITUDE RAF [csh, tcsh]Remember to unset this variable if further processing of pointed observations is going to be performed.
The first four steps are identical to the processing of pointed data.
The task eslewchain divides the slew into a series of small images which are roughly 1 degree by 0.5 degrees in size. Images are created in several energy bands:
1 = 0.2-0.5 keV
2 = 0.5-1.0 keV
3 = 1.0-2.0 keV
7 = 2.0-12.0 keV
6 = 0.2-2.0 keV
8 = 0.2-12.0 keV
For pn slews, images are created using a selection expression of the form:
FLAG==0 && PATTERN==0for energies between 200-500 eV and
FLAG==0 && PATTERN<=4for energies 500 eV
NB: It is imperative to use the Raw Attitude File (RAF) during the processing. If the default attitude is used then source positions will be wrong by roughly 1 arcminute.