... files.¹

only available if ndfperl is installed on your system (see Appendix )

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...OBSSUM²

obssum is simply an alias for sculog $-$summary.

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... provided³

Note that HDS creates temporary files when mapping the reduced data. If the files are in a directory in which you do not have write permission, this operation will fail and photsum will return an error message. This can be overcome by forcing HDS to write temporary files to another directory by setting the HDS/SMALL>_SCRATCH environment variable to a writeable directory (e.g. % setenv HDS_SCRATCH /tmp)

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... SCUBA\_PREFIX)⁴

These variables are directly comparable with the SPECX [14] use of the DATADIR environment variable and the set-gsd-filename command.

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... history.⁵

The KAPPA command hislist provides an explicit data reduction history for a file.

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...SCUCLIP⁶

scuclip can also be used for despiking jiggle/map data as long as sources are weak

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... night⁷

Note that the naming convention has now changed to YYYYMMDD instead of MMMDD as used at the time the data were taken

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... bad.⁸

Note that PHOTOM data array is 3-dimensional; use the NDF section (,,2) with display in order to examine these data.

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... making⁹

It is possible to rebin photometry data although, obviously, the image will not be fully-sampled

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... spike¹⁰

More details on despike can be found in appendix .

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...ast¹¹

As of release v1.3 it is no longer necessary to remove the .AXIS extension before processing with ndf2fits because rebin now writes WCS information using the AST library.

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... images¹²

Available from your support scientist if required although the ORAC-DR pipeline recipes are now preferred

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... measurements¹³

Of course it is still possible to specify an integration to be marked bad but remember to specify also the measurement otherwise the `nth' integration for each measurement will be marked bad rather than the `nth' integration of the `mth' measurement.

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... package.¹⁴

The files can be found in $SURF_DIR/

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... filters¹⁵

for the calibrator signal prior to April 1997 or for different filters please contact your SCUBA support scientist for more advice

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