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Foreground Data

CHIPASS 1.4 GHz

The first file listed below contains HEALPix format brightness temperature and sensitivity data stored in a binary table extension. The second file contains the same HEALPix brightness temperature data stored as a 2D primary image array in HPX projection (Calabretta and Roukema 2007), and may be displayed with SAOImage DS9. For the convenience of users who do not require the capabilities that HEALPix offers, we also provide the maps in two projected image formats: Mollweide and Zenith Equal Area (ZEA). These files contain the string "_mollweide" and "_zea" respectively, and may be displayed with standard astronomical display software such as DS9 and SAOImage. Note that the Mollweide and ZEA image pixels typically over-sample the HEALPix pixels, thus some amount of data replication will be present in the image data. As a result, care must be taken when using the image data in a regime where the noise properties are important since the statistical weight per pixel will also be replicated.

Recommended download procedure for '.fits' or '.tar.gz' files:
right click on the file name and save. For more information on the use of Dataset IDs,
see the LAMBDA Products Overview.

CHIPASS 1.4 GHz
Description
File Info
File Name
CHIPASS 1.4 GHz Continuum Map 100.7 MB
FITS Hdr
lambda_chipass_healpix_r10.fits
CHIPASS 1.4 GHz Continuum Map 104.9 MB
FITS Hdr
lambda_chipass_HPX_r10.fits
CHIPASS 1.4 GHz Continuum Map 67.1 MB
FITS Hdr
lambda_chipass_mollweide.fits
CHIPASS 1.4 GHz Continuum Map 67.1 MB
FITS Hdr
lambda_chipass_zea.fits

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
Web Curator: Mr. Michael R. Greason