IRISPOL

Reduce IRIS imaging polarimetry data.

Function

Reduce IRIS imaging polarimetry data.

Description

IRISPOL reduces data obtained with the AATIRIS polarimeter using the wolaston prism poarizer. The data for a single observation consists of four Figaro files containing the frames for plate position 0, 45, 22.5 and 67.5 degrees. Within each frame are selected two images corresponding to the O and E rays for a siingle mask slot. These spectra are combined to derive a polarization image in TSP format.

Two different algorithms may be selected for the polarimetry reduction. The two algorithms differ in the method used to compensate for transparency variations between the observations at the two plate positions.

The variances on the polarization data are calculated from photon statistics plus readout noise.

Parameters
1 POS1 Char

The Figaro data file for position 0.0.

2 POS2 Char

The Figaro data file for position 45.0.

3 POS3 Char

The Figaro data file for position 22.5.

4 POS4 Char

The Figaro data file for position 67.5.

X1 Integer

X coordinate of the bottom left corner of block

Y1 Integer

Y coordinate of the bottom left corner of block

WIDTH Integer

Width of the block

HEIGHT Integer

Height of the block

XSEP Integer

OE separation vector in X

YSEP Integer

OE separation vector in Y

ALGORITHM Char

The Algorithm to use for stokes parameter calculation (OLD, RATIO)

OUTPUT TSP, 1D

The Output dataset.

Support

Jeremy Bailey, AAO

Version date

3/5/1993