Raw data are passed to the map maker which are processed using the default config file (unless the source is a calibrator) to produce a an image. FCFs are derived if the source is a calibrator. This image is calibrated in mJy/beam, displayed and tagged as a reduced product. A coadd is created and displayed after all the individual observations have been processed. The noise properties of the coadd are calculated and written to a log file, log.noise. The NEFD properties of each image produced by makemap and the coadd are written to another log file, log.nefd.

Finally, the CUPID task findclumps is run using the fellwalker algorithm to create a source catalogue.

• If given data from multiple sources, each source will be processed in full in turn.

• The noise level and NEFD are stored in log.noise and log.nefd respectively. The noise and NEFD are calculated for each image as well as for the final coadd.

• For large amounts of data this recipe will spend a long time not updating the ORAC-DR window. Check to see that makemap is still processing by running top or ps. (Running with -log sf is recommended.)

• Alternative configuration parameters for the iterative map-maker may be specified using the recipe parameters outlined below.

• Flux conversion factors are derived if the source is a calibrator.

• To reduce the chance of spurious source detections, the group coadd is trimmed to the map size specified in the FITS header before running the source finder. This may not work as intended if the coadd contains maps with different centres.

• The output catalogue, if created will have the extension .FIT. A clump file with suffix _clmp will also be created.

• This recipe can handle data from multiple sources and will correctly coadd maps, taking into account the EXP_TIME and WEIGHTS components.

The following recipe parameters can be set via the -recpars

option:

CALUNITS

FINDCLUMPS_CFG

MAKEMAP_CONFIG

MAKEMAP_PIXSIZE

MAKEMAP_REF