% @(#)testt3ccd.hlq	17.1.1.1 (ESO-SDAG) 01/25/02 17:49:46
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1994 European Southern Observatory
%.IDENT      testtaccd.hlq
%.AUTHOR     RHW, SDAG/ESO
%.KEYWORDS   MIDAS, ccd package, linearity, transfer function, CCD testing
%.PURPOSE    On-line help file for the command: TESTT3/CCD
%.VERSION    940620 RHW created
%.VERSION    940817 RHW Split in single procedures
%---------------------------------------------------------------------
\se
SECTION./CCD
\es\co
TESTT3/CCD                                                      14-Jul-1994 RHW
\oc\su
TESTT3/CCD in_tab [out_id] [select]
	Fit the transfer curve and determine the ADU conv. factor and RON
\us\pu
Purpose:    
	Fit the transfer curve and determine the ADU conv. factor and RON
\up\sy
Syntax:     
	TESTT3/CCD in_tab [out_id] [select] 
\ys\pa
        in_tab =  input linearity table, resulting from running the test
                  TESTT1/CCD or the test TESTTA/CCD. For the obligatory 
                  columns in the input table, see the help of the latter.
\ap\pa 
        out_id =  output identifier for the output of the test prodedure. 
                  The graphics output will start with this identifier. 
                  Default is TRANS.
\ap\pa  
        select =  selection criterim to include/exclude entries in the 
                  transfer/linearity table from the tests. 
\ap\no
Note:
        This command requires a value for the standard deviation of the bias 
        level in keyword BIASSIGM and hence should be executed after the 
        command TESTBA/CCD or TESTB5/CCD. If no value or the value zero is 
        found no bias offset will be subtracted.
\\
        The command will determination of the transfer curve.\\
        From the selected entries the table a linear regression analysis is 
        done to determine the analog to digital conversion factor and the
        electronic readout noise. The readout noise is determined by the 
        inverse of the slope between the median and the variance multiplied 
        by the sigma of the bias (determined by TESTBA/CCD OR TESTB5/CCD and 
        stored in keyword BIASSIGM).\\
\\
        The full linearity and transfer test is done by the command TESTTA/CCD.
\on\op
Output:
        The command will stored the graphics output with the transfer curves
        in the postscript file `out_id'_trans.ps. \\
        The keyword ADUCF and ENOISE are filled with the ADU conversion factor
        and the electronic noise (in electrons/pixel).
\po\see
See also:   
        TESTTA/CCD, SET/CCD, SHOW/CCD, SELECT/TAB
\ees\exs
Examples:
\ex
        TESTT3/CCD TRANS TRANS 
        Fit the linearity data in the table TRANS.tbl. Select all data.
        Fit the transfer curves and determine the conversion factors and 
        RON.
\xe \sxe