3.4 FLUXCON : Flux Conversion

aas_det_lt_resp_factor:

The first photometric check is used to compute the reference value for flux conversion (flux_pm). For this purpose first a three value-box-car filter is applied on the photometric check data, the data are ordered (flux_p) and the median is taken.

N : number of data (reset intervals) of the photometric check

To calculate the error on the median a one point offset against the median is computed:

 err_p_p1   : plus one sample deviation against MEDIAN

err_p_m1   		 : 		 minus one sample deviation against MEDIAN

N            		 : 		 number of data of the photometric check

flux_p      		 : 		 ordered array of photometric check data

aas_read_cal_factor:

The relative flux data (rel_flux) and the error of the relative flux (err_13) are taken from calibration file 13, one per band. How to compute this error in the relative flux is described in the related CAP and is not part of this paper.

aas_flux_con:

The new flux and associated error are calculated for each reset interval by:

 flux_out    : new computed flux which is part of the AAR

flux_in     		 : 		 flux input from equation 26

err_out     		 : 		 new computed error which is part of the AAR

err_in      		 : 		 error input from equation 27

Also here the current IA3 system (and OLP V6) calculates the error differently: