This application transforms instrumental magnitudes into calibrated magnitudes
in some photometric system for a catalogue of programme objects. A new catalogue is
written which contains the calibrated magnitudes as well as all the columns in the original
catalogue.
The transformation coefficients used to convert the instrumental magnitudes are read from a file.
Application catphotomfit can be used to prepare a suitable file. See the documentation for this
application for details of the transformation used.
The transformation includes a term for the air mass through which the object was observed.
By default a column containing the air mass is read from the input catalogue. However,
optionally, a column containing the observed zenith distance of the object may be read instead
and used to automatically calculate the air mass.
ZENITHDIST = LOGICAL (read)
Flag; is the air mass read directly from a column or is it
computed from the observed zenith distance? It is coded as follows: TRUE - computed
from the observed zenith distance, FALSE - read directly from a column.
FILNME =
CHARACTER (read)
The name of the file which contains the transformation coefficients.
INSCON = DOUBLE PRECISION (read)
Arbitrary constant previously added to the
instrumental magnitudes.
CATIN = CHARACTER (read)
Name of the input catalogue.
CATOUT = CHARACTER (read)
Name of the output catalogue.
INSMAG = CHARACTER
(read)
Name of the column or expression in the input catalogue holding the instrumental
magnitudes.
AIRMASS = CHARACTER (read)
Name of the column or expression in
the input catalogue holding the air mass.
ZENDST = CHARACTER (read)
Name of
the column or expression in the input catalogue holding the observed zenith distance.
CALMAG = CHARACTER (read)
Name of the column in the output catalogue to hold the
calibrated magnitudes.
TEXT = CHARACTER (read)
Flag indicating the textual header
information to be copied. The valid responses are: A - all; the output catalogue will contain a
complete copy of the header information for the input catalogue, duplicated as comments, C -
(default) copy only the comments from the input catalogue. In the case of a FITS table
the COMMENTS and HISTORY keywords will be copied. N - none; no textual header
information is copied.
QUIET = LOGICAL (read)
Operate in quiet mode where warnings
are suppressed. The permitted values are: TRUE - quiet mode, FALSE - verbose mode.