Content-type: text/html Manpage of zeestat

zeestat

Section: User Commands (1)
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NAME

zeestat - Fits Zeeman parameters to I and V cubes  

PERSON RESPONSIBLE

nebk  

CATEGORIES

model fitting  

DESCRIPTION

ZEESTAT is a Miriad task that fits Zeeman parameters to a region of input I and V cubes. Zeestat also analyses the noise correlations to determine a factor used in correcting the sigma estimates.  

PARAMETERS

iin
Input I cube in vxy order. Wild card expansion is supported. No default.
vin
Input V cube in vxy order. Wild card expansion is supported. No default.
beam
The beam of the observation. This is used in determining the sigma correction factor. The default is a delta function. You should give the beam if you want an accurate estimate of sigma. Wild card expansion is supported.
rho
The channel-to-channel correlation coefficient. This is used in determining the sigma correction factor. The default is 0.
freq
Frequency (GHz) of splitting. No default.
mode
This is a character string that determines the algorithm used in the fitting process. It consists of several flags, which can be:
  m Use maximum likelihood technique.
  l Include a leakage term in the fitting.
  2 Use a two sided derivative estimate.
  x Perform extra checks for better solutions when using the maximum
    likelihood technique.
The default is ' ' i.e., least squares and 1.
aveop
If 'a' then the spectra specified by the spatial window are averaged before being passed to the fitting routine. Otherwise, and by default, all spectra are passed to the fitting routine and "spatial summing" (as defined by SKLZ) is performed.
chan
Channel range. Default is all channels.
blc
Bottom left corner of spatial region to examine. Default is (1,1).
trc
Top right corner of spatial region to examine. Default is all of image.
log
This is the name of an output logfile, which shows how the error estimate varies with the alpha parameter.
out
Output results to this file as well as screen


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

This document was created by man2html, using the manual pages.
Time: 18:35:39 GMT, July 05, 2011