FLUX is a superset of ASTRO which incorporates a new language (called FLUX) to allow the derivation of fluxes from pointings scans made in single-dish or interferometric modes. One has to use the following sequence:
FLUX\FILE filename - Define the entry file 'filename' (produced by PRINT FLUX/OUT) FLUX\READ antenna frequency - Read the gaussian fits data from the antenna number 'antenna' and the frequency 'frequency'. ASTRO\SET FLUX name flux - Attribute the flux value 'flux' to the source (usually a quasar) 'name'. This optional command is used when no planet measurements is available and/or as a redundant flux check on strong and well known quasars. Note that this is an ASTRO command. FLUX\SOLVE name1 [name2 [...]]] - Use the planet or quasar 'name1' as flux reference. For a planet, the flux is derived using the gain USB/LSB and the frequency informations:
Then calculate the fluxes of all sources as described below at the ``gain corrected'' frequency:
+ Correct Azimuth subscan for elevation pointing error + Correct Elevation subscan for azimuth pointing error + Average both subscans to derive the source intensity (with proper weighting using standard deviations) + Average all independant scans on the same source (with proper weighting) + Determine the average antenna efficiency from the list of sources of known flux, with error estimate + Determine the unknown fluxes, giving two error estimates: Relative (only the noise in the source measurement) and Absolute (which also includes the error on antenna efficiency) FLUX\PRINT /OUTPUT file [New] - Print the date and an information line on the meaning of each column, then the fluxes with error bars, the frequency, the antenna number and the average antenna efficiency (Jy/K), with error bars. - The file can be reopened. FLUX\INDEX filei source/OUTPUT fileo [New] - Compute the spectral index of the source 'source' from all the data available on that source in the input file 'filei' (result from FLUX\PRINT). - Write the results on the output file 'fileo'. - The output file can be reopened.