WF3CCD

The wfc3tools module contains a function wf3ccd that calls the wf3ccd executable. Use this function to facilitate batch runs or for the TEAL interface.

This routine contains the initial processing steps for all the WFC3 UVIS channel data. These steps are:

  • dqicorr - initializing the data quality array
  • atodcorr - perform the a to d conversion correction
  • blevcorr - subtract the bias level from the overscan region
  • biascorr - subtract the bias image
  • flshcorr - subtract the post-flash image

If blevcorr is performed the output contains the overcan-trimmed region.

Only those steps with a switch value of PERFORM in the input files will be executed, after which the switch will be set to COMPLETE in the corresponding output files.

Examples

In Python without TEAL:

>>> from wfc3tools import wf3ccd
>>> calwf3.wf3ccd(filename)

In Python with TEAL:

>>> from stsci.tools import teal
>>> from wfc3tools import wf3ccd
>>> teal.teal('wf3ccd')

In Pyraf:

>>> import wfc3tools
>>> epar wf3ccd
wfc3tools.wf3ccd.wf3ccd(input, output='', dqicorr='PERFORM', atodcorr='PERFORM', blevcorr='PERFORM', biascorr='PERFORM', flashcorr='PERFORM', verbose=False, quiet=True)

Run the wf3ccd.e executable as from the shell. For more information on CALWF3 see the WFC3 Data Handbook at http://www.stsci.edu/hst/wfc3/documents/handbooks/currentDHB/

Parameters:

input : str

Name of input files

  • a single filename (iaa012wdq_raw.fits)
  • a Python list of filenames
  • a partial filename with wildcards (\*raw.fits)
  • filename of an ASN table (\*asn.fits)
  • an at-file (@input)
output: str
Name of the output FITS file.
dqicorr: str, “PERFORM/OMIT”, optional
Update the dq array from bad pixel table
atodcorr: str, “PERFORM/OMIT”, optional
Analog to digital correction
blevcorr: str, “PERFORM/OMIT”, optional
Subtract bias from overscan regions
biascorr: str, “PERFORM/OMIT”, optional
Subtract bias image
flashcorr: str, “PERFORM/OMIT”, optional
Subtract post-flash image
verbose: bool, optional
Print verbose time stamps?
quiet: bool, optional
Print messages only to trailer file?

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