Specifies a pre-existing catalogue of objects in the CCD
frame. The format is that produced as output by SExtractor
when CATALOG_TYPE is set to
ASCII_HEAD. The file starts with a sequence of
lines of the form
# <colnum> <colname> <optional comment>
sextractor
documentation; and optional comment is some
(ignored) annotation. The data immediately follows, in
rows with the given number of columns in them. In each of
these rows, any text following a # is
ignored, and may be used for other annotation.You control which columns SExtractor
generates by specifying them in the SExtractor
.param file. The catalogue must have all of
the fields
NUMBER,
FLUX_ISO,
X_IMAGE,
Y_IMAGE,
A_IMAGE,
B_IMAGE,
X2_IMAGE,
Y2_IMAGE,
ERRX2_IMAGE,
ERRY2_IMAGE,
ISOAREA_IMAGE,
of which
X2_IMAGE,
Y2_IMAGE,
A_IMAGE,
B_IMAGE,
ERRX2_IMAGE,
ERRY2_IMAGE
are not generated by default.
For further details about SExtractor, and details of these required columns, see Section 4
If you include the option --keeptemps
to avoid deleting the temporary work directory, you will
be able to scavenge the extractor output from there if
this is useful to you.
Type: string; default: none