DREAM/STARE data reduction workflow

The DREAM/STARE observing modes ([3]) were originally designed for mapping compact sources, i.e. those which are smaller than the field of view of SCUBA-2 (approximately 8 arcmin). Although these modes have not been commissioned at the time of writing and it is thought that STARE mode will not work, it is nevertheless more straightforward to discuss DREAM and STARE first.

The workflow for processing DREAM and STARE data may proceed in one of two ways: a simplified workflow using images calculated by the data acquisition (DA) at the time of the observation, or the full workflow starting from the raw data. The full procedure is described below, and steps which are unnecessary in the simplified workflow are noted.

The workflow proceeds as follows:

1. Apply flatfield solution (full only);
2. Remove atmospheric emission;
3. Correct for atmospheric extinction;
4. Calculate images from time-series (full only);
5. Combine images to create output mosaic.