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VIII/7A Hat Creek High-Latitude H I Survey (Heiles+ 1974-1976)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
catalog.dat fits.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VIII/7A
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The Hat Creek High-Latitude H I Survey
Heiles C. and Habing H.J.
<Astron. & Astrophys. Suppl., 14, 1 (1974)>
=1974A&AS...14....1H
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ADC_Keywords: Radio sources ; Surveys ; H I data
Description:
This survey consists of H I 21-cm spectra covering the entire northern
sky with absolute Galactic latitude |b|>10 degrees and declination
dec>-30degrees. The observations were made with the Hat Creek 85-foot
telescope between 1968 and 1970. The individual spectra were obtained
with a bank of 100 filters covering the velocity range from -92km/s to
+75km/s. The velocity resolution was 2 km/sec (except at the ends of
the spectra) and the beamwidth was 36arcmin. The spacing between
points observed on the sky is (0.3deg/cosb) in Galactic longitude and
(0.6deg) in Galactic latitude.
A FITS version of the survey was derived at the Astrophysics Data
Facility (NASA/GSFC) from the original catalog of spectra. The
approximately 130,000 good spectra in the catalog (i.e., those with
status code 1 and which have flat baselines) were interpolated to a
uniform channel width in frequency, shifted as appropriate to take
into account the proper central velocities, then interpolated onto a
regular grid in Galactic coordinates. For the latter interpolation,
the cos(b) corrections for longitude offsets were taken into account;
no interpolation was done across gaps in coverage greater than 2 deg.
Latitude-velocity slices were written in FITS format for each 30
arcmin of longitude. Separate files were written for the negative
latitude (b < -10 deg ) and positive latitude (b > 10 deg) ranges.
Slices containing no spectra, primarily negative latitude spectra in
the fourth Galactic quadrant, were not written. A longitude-latitude
map, integrated over all velocities, was also written in FITS format
to illustrate the coverage of the individual latitude-velocity slices.