https://casaguides.nrao.edu/index.php?title=Fluxscale&feed=atom&action=historyFluxscale - Revision history2024-03-28T21:55:20ZRevision history for this page on the wikiMediaWiki 1.38.6https://casaguides.nrao.edu/index.php?title=Fluxscale&diff=16875&oldid=prevJott: Replaced content with "{{fluxscale}}"2015-05-06T23:28:25Z<p>Replaced content with "{{fluxscale}}"</p>
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</td></tr></table>Conversion scripthttps://casaguides.nrao.edu/index.php?title=Fluxscale&diff=77&oldid=prevJgallimo: Created page with '== Help on fluxscale task: == <pre> Bootstrap the flux density scale from standard calibrators After running gaincal on standard flux density calibrators (with or …'2009-10-30T15:06:10Z<p>Created page with '== Help on fluxscale task: == <pre> Bootstrap the flux density scale from standard calibrators After running gaincal on standard flux density calibrators (with or …'</p>
<p><b>New page</b></p><div>== Help on fluxscale task: ==<br />
<br />
<pre><br />
Bootstrap the flux density scale from standard calibrators<br />
<br />
After running gaincal on standard flux density calibrators (with or<br />
without a model), and other calibrators with unknown flux densities,<br />
fluxscale will determine the flux density of the unknowns calibrators<br />
that are most consistent with the standard calibrator antenna gains.<br />
<br />
Check the log output to make sure that reasonable flux densities are<br />
obtained.<br />
<br />
Keyword arguments:<br />
vis -- Name of input visibility file<br />
default: none; example: vis='ngc5921.ms'<br />
caltable -- Name of input calibration table<br />
default: none; example: caltable='ngc5921.gcal'<br />
This cal table was obtained from task gaincal.<br />
fluxtable -- Name of output, flux-scaled calibration table<br />
default: none; example: fluxtable='ngc5921.gcal2'<br />
The gains in this table have been adjusted by the<br />
derived flux density each calibrator. The MODEL_DATA<br />
column has NOT been updated for the flux density of the<br />
calibrator. Use setjy to do this if it is a point source.<br />
reference -- Reference field name(s)<br />
The names of the fields with a known flux densities or<br />
visibilties that have been placed in the MODEL column<br />
by setjy or ft for a model not in the CASA system.<br />
The syntax is similar to field. Hence field index or<br />
names can be used.<br />
default: none; example: reference='1328+307'<br />
transfer -- Transfer field name(s)<br />
The names of the fields with unknown flux densities.<br />
These should be point-like calibrator sources<br />
The syntax is similar to field. Hence source index or<br />
names can be used.<br />
default: '' = all sources in caltable that are not specified<br />
as reference sources. Do not include unknown target sources<br />
example: transfer='1445+099, 3C84'; transfer = '0,4'<br />
<br />
NOTE: All fields in reference and transfer must have solutions<br />
in the caltable.<br />
<br />
append -- Append fluxscaled solutions to the fluxtable.<br />
default: False; (will overwrite if already existing)<br />
example: append=True<br />
refspwmap -- Vector of spectral windows enablings scaling across<br />
spectral windows<br />
<br />
Keyword arguments:<br />
vis -- Name of input visibility file<br />
default: none; example: vis='ngc5921.ms'<br />
caltable -- Name of input calibration table<br />
default: none; example: caltable='ngc5921.gcal'<br />
This cal table was obtained from task gaincal.<br />
fluxtable -- Name of output, flux-scaled calibration table<br />
default: none; example: fluxtable='ngc5921.gcal2'<br />
The gains in this table have been adjusted by the<br />
derived flux density each calibrator. The MODEL_DATA<br />
column has NOT been updated for the flux density of the<br />
calibrator. Use setjy to do this if it is a point source.<br />
reference -- Reference field name(s)<br />
The names of the fields with a known flux densities or<br />
visibilties that have been placed in the MODEL column<br />
by setjy or ft for a model not in the CASA system.<br />
The syntax is similar to field. Hence field index or<br />
names can be used.<br />
default: none; example: reference='1328+307'<br />
transfer -- Transfer field name(s)<br />
The names of the fields with unknown flux densities.<br />
These should be point-like calibrator sources<br />
The syntax is similar to field. Hence source index or<br />
names can be used.<br />
default: '' = all sources in caltable that are not specified<br />
as reference sources. Do not include unknown target sources<br />
example: transfer='1445+099, 3C84'; transfer = '0,4'<br />
<br />
NOTE: All fields in reference and transfer must have solutions<br />
in the caltable.<br />
<br />
append -- Append fluxscaled solutions to the fluxtable.<br />
default: False; (will overwrite if already existing)<br />
example: append=True<br />
refspwmap -- Vector of spectral windows enablings scaling across<br />
spectral windows<br />
default: [-1]==> none.<br />
Example with 4 spectral windows:<br />
if the reference fields were observed only in spw=1 & 3,<br />
and the transfer fields were observed in all 4 spws (0,1,2,3),<br />
specify refspwmap=[1,1,3,3].<br />
This will ensure that transfer fields observed in spws 0,1,2,3<br />
will be referenced to reference field solutions only in<br />
spw 1 or 3.<br />
</pre></div>Jgallimo