SPICE User's Guide - IRSA

A.4 Ridge
To run, type:
unix% ridge
where the options are as follows:
-p The output table from running the Profile module in the previous step.
SPICE User’s Guide
-f The *fov.tbl file, which codes the order to be extracted for each FOVID, the default ridge
location, and the extraction aperture width at a fiducial wavelength.
-m The number of points to use for median filtering (LO-RES only). Must be ODD.
-s The number of sigma to require the peak to be above the mean (LO-RES only). Must be
between 0.0 and 10 (inclusive). The default is 5.
-g The width, given in plus-or-minus percent of the array in the cross-dispersion direction,
to be analyzed, centered on expected position (LO-RES only). Allowed values are floats
from 0.0 to 100, default is 100.0. e.g. if you wish to include 25% of the array either side
of the profile center, giving you a total extraction width of 50% of the array, you would
set a value of 25.0.
-glo Explicitly specify the low-end cutoff of g (LO-RES only). Allowed values are specified
in percent, and are floats from 0.0 to 100. Default is to use the value set by the flag –g.
-ghi Explicitly specify the high-end cutoff of g (LO-RES only). Allowed values are specified
in percent, and are floats from 0.0 to 100. Default is to use the value set by the flag –g.
-o The output table containing the x,y position of the peak for each order and each
wavelength. Default is .ridge.tbl.
-i The name of the *wavsamp.tbl file. This file specifies the location of the spectral orders
on the array in x-y coordinates. It consists of pseudorectangles, which describe the
fractional pixels that comprise each wavelength in the spectrum. You should choose the
appropriate file in the cal/ subdirectory of your SPICE installation. The file you choose
should match both the Spitzer pipeline version with which your data were processed and
the IRS module with which you are working.
-c Explicitly select the ridge position (a percentage fromo 0.0 to 100.0). The default is to
compute the position automatically from the profile.
SPICE on the Command Line 45 A.4 Ridge