Galactic H I column densities (Murphy+ 1996)

Details Galactic H I column densities (Murphy+ 1996) Galactic H I column densities (Murphy+ 1996)

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat..21050369m&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/105/369. Originally published in: 1996ApJS..105..369M

Physics

Qsos, Active Gal. Nuclei, H I Data

Scientific paper

The file data.fit contains the data for all 220 objects as FITS IMAGE extensions. The spectrum for each object is written as an image extension in the same order as printed in table 1 (and the FITS table in the first file). The data are written as 1-dimensional spectra and are in units of brightness temperature in Kelvins. In the header, the LSR velocity (CRVAL1), the reference pixel (CRPIX1), and the velocity increment (CRPIX1) can by used to calculate the LSR velocity of a given pixel. Note that the data are linear in frequency, not velocity, and this must be taken into account when calculating the velocity of a given pixel. The FITS files were written using the CFITSIO package written by Dr. William Pence at the GSFC. (1 data file).

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