Foreground Data


Product Name
Parkes 85 MHz Continuum Map
Coord. System
Projection Type
HEALPix, nested, res 6 (Nside=64)
3.5 degrees


Landecker and Wielebinski (1970) used the Parkes radio telescope to survey the sky at 85 MHz between declinations -25° and +25° with a 3.8° x 3.5° beam.

The Centre d'Analyse de Données Etendues group used the original brightness temperature data from the Max Planck Institute for Radioastronomy Survey Sampler site to form a HEALPix format map following the method described in Appendix A of Paradis et al. 2012, A&A, 543, 103, ADS. Their HEALPix map is provided here. LAMBDA made a new version of the FITS file with minor changes to the headers to make them compliant with FITS standards. The units of the map are K brightness temperature, and unobserved pixels are set to a sentinel value of -32768.

More details can be found in:

"The Galactic Metre Wave Radiation: A two-frequency survey between declinations +25° and -25° and the preparation of a map of the whole sky", Landecker, T. L. and Wielebinski, R. 1970, Aust. J. Phys. Suppl., 16, 1, ADS

CADE Parkes page

Max Planck Institute for Radioastronomy Survey Sampler site

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A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
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