Calibration Utilities

General utilities for ACS calibration adapted from HSTCAL.

Functions

extract_dark(prihdr, scihdu)	Extract superdark data from DARKFILE or DRKCFILE.
extract_flash(prihdr, scihdu)	Extract postflash data from FLSHFILE.
extract_flatfield(prihdr, scihdu)	Extract flatfield data from PFLTFILE.
from_irafpath(irafpath)	Resolve IRAF path like jref$ into actual file path.
extract_ref(scihdu, refhdu)	Extract section of the reference image that corresponds to the given science image.
find_line(scihdu, refhdu)	Obtain bin factors and corner location to extract and bin the appropriate subset of a reference image to match a science image.
get_corner(hdr[, rsize])	Obtain bin and corner information for a subarray.
get_lt(hdr)	Obtain the LTV and LTM keyword values.
from_lt(rsize, ltm, ltv)	Compute the corner location and pixel size in units of unbinned pixels.
hdr_vals_for_overscan(root)	Retrieve header keyword values from RAW and SPT FITS files to pass on to check_oscntab() and check_overscan().
check_oscntab(oscntab, ccdamp, xsize, ysize, ...)	Check if the supplied parameters are in the OSCNTAB reference file.
check_overscan(xstart, xsize[, ...])	Check image for bias columns.