## Using Pointings and Cross-correlations

A new option in the command SOLVE FLUX has been implemented which allows flux densities calculations using either POINTINGS and/or CROSS-CORRELATIONS. This is the command:

            CLIC\SOLVE FLUX /OUTPUT file NEW[OLD]

This command, applied on the CROSS-CORRELATIONS, generates an output file which can directly be read by he language FLUX in ASTRO. It treats the CROSS-CORRELATIONS like POINTINGS assuming that positionnal errors are “zero”. The scenario is quite similar to the case above:

            CLIC\SET RF ON FREQ
            CLIC\SET PHASE RELATIVE
            CLIC\SET BAND DSB
            CLIC\SET SUB L01 TO L06
            CLIC\SET SOURCE Phase_Calib RF_CAlib
            CLIC\SET PROC CORR
            CLIC\SET FLUX RF_Calib xx.x     !see flux reports
            CLIC\FIND /SCAN x y     !After a pointing on RF_Calib
            CLIC\FIND APPEND /SCAN v w      !After a pointing on Phase_Calib
            CLIC\SOLVE FLUX/OUTPUT flux.fit NEW

When the flux density of the amplitude calibrator is known, update the CLIC calibration procedure (described in the “Calibration Cookbook”) as follows:

            CLIC\SET SOURCE Phase_Calib RF_CAlib
            CLIC\SET PROC POINT CORR
            CLIC\SET FLUX Phase_Calib xx.x
            CLIC\SET FLUX RF_Calib yy.y
            CLIC\FIND
            CLIC\STORE FLUX (On all cross-correlations)

Now you can proceed to the standard Amplitude Calibration using cross-correlations on the Amplitude Calibrator (see “Calibration Cookbook”).