GETPAIR

Name

getpair

Purpose

Read two OSIRIS XD data files and return the difference strip image.

Description

Calling Sequence

getpair,calib,root,i1,i2,diff,hdr,RAW=raw

Inputs

calib- Anonymous structure containing all pertinent calibration
information. This structure is usually loaded beforehand using
the routine, "ldcalir"
root - string containing the root of the file name (with leading path
if desired).
i1 - Frame id (integer) of first image.
i2 - Frame id (integer) of second image.

Optional Input Parameters

Keyword Input Parameters

RAW - Flag, if true will inhibit the column-wise background subtraction.
The default is to fit the background in each column (along the
slit) and subtract the fitted background. Use a linear function
for the background.

Outputs

diff - i1-i2 after XD spectra extracted to strip image. (see getstrip)
hdr - FITS header for image.

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Specifically written for OSIRIS cross-dispersed spectral data.

Procedure

Modification History

95/03/24, Written by Marc W. Buie, Lowell Observatory
95/09/15, MWB, added usage of calib structure and return of header.