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Ginga Specific Software: Program ATT_INSERT



Purpose

Program att_insert inserts the high-energy transmission efficiency information into Ginga data files but does not perform the attitude correction (for use with extended, confused sources etc.). Thus, att_insert is functionally similar to attcorr but without the crucial divide statement. Currently the following data types can be handled:

  1. 48 spectral channel MPC1 and MPC2 cubes
  2. 12 spectral channel MPC3 cubes
  3. TIME series
Att_insert uses collimator transmission data derived from Crab Scan data by the Japanese. The output file contains a new object, TRANSMISSION, which represents the high-energy transmission. Collimator reflection can be corrected for if necessary in the first two cases. The transmission data may not be sufficiently accurate to produce adequately corrected spectral files from a CUBE. It should be checked using an uncorrected file and the ad hoc spectral fitting reflection correction (see gcs@star.le.ac.uk for details).


Input File

A Ginga CUBE or TIME series.


Output File

A Ginga CUBE or TIME series with the transmission information inserted.


Input Parameters

Att_insert requires four input parameters. The QX parameter system is used to read these parameters.

ATT_DATIN The name of the input file.
ATT_DATOUT The name of the output file created, containing the high-energy transmission information.
ATT_TR_FILE The name of the file containing collimator transmission data (the default is $XACAL/trans.dat)
ATT_DO_REF Apply collimator reflection correction (the default is No).


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