Chapter 10
Single-Dish Data in AIPS

AIPS was not originally intended as a reduction package for single-dish data and cannot be considered as such today. However, because of the similarity of single-dish data taken at “random” pointings on the sky to interferometric data taken at “random” locations in the uv plane, AIPS was seen as a system to be used to solve large imaging problems arising from single-dish observations. Many of the AIPS uv-data tasks are able to do something sensible — or even desirable — with single-dish data and a few special tasks to process single-dish data have been written. The present chapter contains a discussion of the representation of single-dish data in AIPS followed by a description of how such data may be calibrated, corrected, converted into images, and analyzed by AIPS. A final section on using single-dish observations to improve the imaging of interferometric data represents what little we now know about this potentially important process.

 10.1 AIPS format for single-dish data
  10.1.1 On-the-fly data from the 12m
  10.1.2 Other input data formats
 10.2 Single-dish data in the “uv” domain
  10.2.1 Using PRTSD, UVPLT, and POSSM to look at your data
  10.2.2 Using UVFLG, SPFLG, and EDITR to edit your data
  10.2.3 Using CSCOR and SDCAL to calibrate your data
  10.2.4 Using SDLSF and SDVEL to correct your spectral-line data
  10.2.5 Using SDMOD and BSMOD to model your data
 10.3 Imaging single-dish data in AIPS
  10.3.1 Normal single-dish imaging
  10.3.2 Beam-switched continuum imaging
 10.4 Analysis and display of single-dish data
  10.4.1 Spectral baseline removal
  10.4.2 Using WTSUM and BSAVG to combine images
  10.4.3 Spectral moment analysis
  10.4.4 Source modeling and fitting
  10.4.5 Image displays
  10.4.6 Backing up your data
 10.5 Combining single-dish and interferometer data