Gass: The parkes galactic all-sky survey I. Survey description, goals, and initial data release

N. M. McClure-Griffiths, D. J. Pisano, M. R. Calabretta, Alyson H. Ford, Felix J. Lockman, L. Staveley-Smith, P. M.W. Kalberla, J. Bailin, L. Dedes, S. Janowiecki, B. K. Gibson, T. Murphy, H. Nakanishi, K. Newton-Mcgee

Research output: Contribution to journalArticlepeer-review

262 Scopus citations


The Parkes Galactic All-Sky Survey (GASS) is a survey of Galactic atomic hydrogen (Hi) emission in the Southern sky covering declinations δ < 1° using the Parkes Radio Telescope. The survey covers 2π steradians with an effective angular resolution of ∼16′, at a velocity resolution of 1.0 km s-1, and with an rms brightness temperature noise of 57 mK. GASS is the most sensitive, highest angular resolution survey of Galactic Hi emission ever made in the Southern sky. In this paper, we outline the survey goals, describe the observations and data analysis, and present the first-stage data release. The data product is a single cube at full resolution, not corrected for stray radiation. Spectra from the survey and other data products are publicly available online.

Original languageEnglish (US)
Pages (from-to)398-412
Number of pages15
JournalAstrophysical Journal, Supplement Series
Issue number2
StatePublished - 2009
Externally publishedYes


  • Galaxies: Interactions
  • Galaxy: Structure
  • Ism: General
  • Magellanic clouds
  • Radio lines: Ism surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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