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Paper: Realtime, Object-oriented Reduction of Parkes Multibeam Data using AIPS++
Volume: 6, Twenty Years of ADASS
Page: 463
Authors: Barnes, D. G.
Abstract: An overview of the Australia Telescope National Facility (ATNF) Parkes Multibeam Software is presented. The new thirteen-beam Parkes 21 cm Multibeam Receiver is being used for the neutral hydrogen (HI) Parkes All Sky Survey (HIPASS). This survey will search the entire southern sky for HI in the redshift range -1200 km s-1 to +12600 km s-1; with a limiting column density of NHI ≃ 5 × 1017 cm-2. Observations for the survey began in late February, 1997, and will continue through to the year 2000. A complete reduction package for the HIPASS survey has been developed, based on the AIPS++ library. The major software component is realtime, and uses advanced inter-process communication coupled to a graphical user interface, provided by AIPS++, to apply bandpass removal, flux calibration, velocity frame conversion and spectral smoothing to 26 spectra of 1024 channels each, every five seconds. AIPS++ connections have been added to ATNF-developed visualization software to provide on-line visual monitoring of the data quality. The non-realtime component of the software is responsible for gridding the spectra into position-velocity cubes, typically 200000 spectra are gridded into an 8° × 8° cube.
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