XMM-Newton Science Analysis System


omfchain (omfchain-1.43.2) [22.0.0-9173c7d25-20250127]

Fast chain tasks

The Fast chain works in the following way:

• When started, omfchain creates indexes of the Optical Monitor Fast mode data set files presented in the input directory.

• If flat field files (FFX) are not found, omfchain creates an empty flat field file

• If periodic or non-periodic housekeeping files are not found in the input directory, the chain is stopped.

• If tracking history files (THX) are not found for the given exposure, the chain creates a dummy tracking history file.

• For each observation, as well as for each exposure and scientific window, omfchain produces intermediate and pipeline output files according to the following scheme.

The following tasks are used by the Fast chain:

Step	Task	Input files (coming from the step No.)	Output files (going to)
1	omprep	in$\rightarrow$ Tracking history,	Temporary tracking history $\rightarrow$ 2,6
		in$\rightarrow$ Periodic house keeping,
		in$\rightarrow$ Non-periodic house-keeping,
		in$\rightarrow$ Window data
2	omdrifthist	1$\rightarrow$ Temporary tracking history	Tracking history plot $\rightarrow$out
3	omthconv	in$\rightarrow$Non-periodic house-keeping	Tracking history timeseries $\rightarrow$out
4	omprep	in $\rightarrow$ Event list,	Intermediate event list $\rightarrow$5,6
		in $\rightarrow$ Periodic house keeping,
		in $\rightarrow$ Non-periodic house-keeping,
		in $\rightarrow$ Window data
5	evselect	4$\rightarrow$ Intermediate event list	Output raw image $\rightarrow$out
6	omfastshift	1$\rightarrow$ Temporary tracking history,	Corrected event list$\rightarrow$ 7,11,12
		4$\rightarrow$ Intermediate event list
7	omfastflat	in$\rightarrow$ In-orbit flat-field,	PPS image $\rightarrow$8
		6$\rightarrow$ Intermediate event list	PPS flat-field $\rightarrow$out
8	omdetect	7 $\rightarrow$ PPS image	Source region (ASCII-file) $\rightarrow$9
			OSW source list $\rightarrow$9,10
9	omatt	8$\rightarrow$ Source region	Sky coordinate PPS image $\rightarrow$out
		8$\rightarrow$ OSW source list
10	omregion	8$\rightarrow$ OSW source list	Source region $\rightarrow$11,13
			Background region $\rightarrow$12,13
11	evselect	10$\rightarrow$ Source region	Source rates table $\rightarrow$13
		6$\rightarrow$ Intermediate event list
12	evselect	10$\rightarrow$ Background region	Background rates table $\rightarrow$13
		6$\rightarrow$ Intermediate event list
13	omlcbuild	11$\rightarrow$ Source rates table	Light curve table $\rightarrow$14
		10$\rightarrow$ Source region
		12$\rightarrow$ Background rates table
		10$\rightarrow$ Background region
		in$\rightarrow$ Imaging-mode data file (if exists)
14	lcplot	13$\rightarrow$ light curve table	Light curve postscript plot $\rightarrow$15
15	ps2pdf	14$\rightarrow$ Light curve postscript plot	Light curve $\rightarrow$out PDF-plot