NAME
bias.csh - generates bias frames
SYNOPSIS
bias.csh
DESCRIPTION
bias.csh is a script which takes a series of exposures of with zero
length exposures to determine the d.c. offset (bias) level of the CCD. The
procedure first places the U filter (to make it even darker) then takes five
frames and then calculates the median. The DATID must be specified in the
environment, so that the resulting file can have a name. If the median
procedure is successful, the file is copied to the file
DATA_DIR/flats/bias.fts, where DATA_DIR is found in
ait.config
The resulting file is used by
ccdproc
SEE ALSO
ccdproc,
median,
ait.config