check_overscan

acstools.utils_calib.check_overscan(xstart, xsize, total_prescan_pixels=24, total_science_pixels=4096)

Check image for bias columns.

Parameters:

  • xstart (int) – Starting column of the readout in detector coordinates.

  • xsize (int) – Number of columns in the readout.

  • total_prescan_pixels (int) – Total prescan pixels for a single amplifier on a detector. Default is 24 for WFC.

  • total_science_pixels (int) – Total science pixels across a detector. Default is 4096 for WFC (across two amplifiers).

Returns:

  • hasoverscan (bool) – Indication if there are bias columns in the image.

  • leading (int) – Number of bias columns on the A/C amplifiers side of the CCDs (“TRIMX1” in OSCNTAB).

  • trailing (int) – Number of bias columns on the B/D amplifiers side of the CCDs (“TRIMX2” in OSCNTAB).