NAME

ptne_sel -- Build a component database from a subset of lines from a line list

USAGE

line_sel linetab output minwave maxwave threshold

DESCRIPTION

This script provides an easy way to build a component database from an exisiting line list table. The line list can be an ASCII or SDAS binary table.

PARAMETERS

linetab = "" [file]

Input line line table. The table must have columns containing wavelength and intensity data and may be binary SDAS or ASCII tables.

output = "" [file]

The name of the output database table.

minwave = "" [real]

The lower wavelength limit for selecting lines from the line list.

maxwave = "" [real]

The upper wavelength limit for selecting lines from the line list.

threshold = "" [real]

The intensity threshold for selection lines from the line list. Only lines with intensities greater this value will be selected.

scale = "" [real]

This is an arbitrary scaling value (i.e., fudge factor) to be applied to the selected lines. This is very useful to coerce the intial guess of the model components to be close to the observed line intensities.

wavecol = "" [string]

The name of the column in the line list table containing wavelength information.

intscol = "" [string]

The name of the column in the line list table containing intensity information.

waveuni = "" [string]

The units of the column in the line list table containing wavelength information.

intsuni = "" [string]

The units of the column in the line list table containing intensity information. If a scale factor is applied this should be set to the units of the intensities after scaling.

EXAMPLES

1. Build a component database from a Pt-Ne line list.

   cl> line_sel ptneline.tab my_db.tab 1200. 1232. 10000. 

REFERENCES

This package was written by J.D. Eisenhammer, S.J. Hulbert, Z.G. Levay, and R.A. Shaw. Support for this software development was provided by the Astrophysics Data Program through NASA grant NAG5-31859 to STScI.

SEE ALSO

components