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XMM-Newton Science Analysis System
omfchain (omfchain-1.34.3) [xmmsas_20080701_1801-8.0.0]
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The location of the ODF files is specified by either setting the environment variable
SAS_ODF (setenv SAS_ODF directory-path), or by specifying the input directory
(omfchain inpdirectory=directory path), or by setting the environment variable
SAS_ODF to a SAS summary file. For the latter, the omfchain will extract the
directory path from the SAS summary file. Note that SAS-ODF should actually be
SASunderscoreODF- latex objects to underscores).
- Use command `omfchain` to process the ODF data set in the current
directory or to where SAS_ODF has been set to, and to place the product
files in the current directory.
- Use command `omfchain inpdirectory=input-directory-path` to process
the OM ODF data set in the specified directory, and to place the product files in the
current directory.
- Use command `omfchain outdirectory=output-directory-path` to process the
ODF data set in the current directory or to where SAS-ODF has been set to,
and to place the output files in the specified directory.
- Use command `omfchain inpdirectory=input-directory-path
outdirectory=output-directory-path` to specify both the location of the ODF
data set and the directory where the product files are to be placed.
Apart from the initial automatic creation of the flat-field image, the omfchain can be considered as being divided into 4 subsequent stages for
processing each window/event list (see figure 1).
Figure 1:
OM Fast Mode Pipeline
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- Tracking history information is turned into graphic products and a file
used by the event-list analysis part of the chain.
- A tracking-shift and flat-field corrected image is created from the event
list.
- The image is source-searched and appropriate extraction regions defined.
- Background-subtracted light-curves are derived (on a per-exposure basis)
for each source from the event list and graphical products are generated.
These four processes run inside a loop over all exposures and all windows. In
addition, the last step is executed for all detected sources within each window
(see figure 1).
XMM-Newton SOC/SSC -- 2008-07-02