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Version 1.9 Build 1488 |
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Package | general | |
Module | images | |
Tool | imagepol |
clip | in | Clip level for auto-sigma determination | |
Allowed: | Float | ||
Default: | 10 | ||
sigma | in | Standard deviation of thermal noise | |
Allowed: | Float | ||
Default: | Auto determined | ||
outfile | in | Output image file name | |
Allowed: | String | ||
Default: | Unset |
This function (short-hand name sftp) returns the error (standard deviation) of the fractional total polarization. This result comes from standard propagation of errors. The result is an Image tool as the error is signal-to-noise ratio dependent.
This function requires the standard deviation of the thermal noise. You can either supply it if you know it, or it will be worked out for you with outliers from the mean clipped at the specified level.
- p := imagepol('stokes.cube') - sigftp := p.sigmafractotpol()