VIII/11 Berkeley Low-Latitude H I Survey (Weaver+ 1973)
The Berkeley Low-Latitude Survey of Neutral Hydrogen
Weaver H., Williams D.R.W.
<Astron. & Astrophys. Suppl., 8, 1 (1973)>
=1973A&AS....8....1W 1973A&AS....8....1W
ADC_Keywords: Radio sources ; Surveys ; Radio lines ; H I data
Description:
This survey consists of H I 21-cm spectra covering galactic latitudes
from -10 degrees to +10 degrees and galactic longitudes from 10degrees
to 250degrees. The observations were made with the Hat Creek 85-foot
telescope between 1968 and 1970. The individual spectra contain 238
points per profile spaced every 5kHz and cover a velocity range of
250km/s. The velocity resolution is 2km/s (half-power of each filter)
and the half-power beamwidth is 35arcmin. The spacing between points
observed on the sky are 0.25degrees in galactic latitude and
0.5degrees in galactic longitude. Each spectrum or record consists of
a header followed by 238 antenna temperatures. The header contains the
galactic longitude, galactic latitude, and central velocity (LSR). The
catalog contains a total of 38961 spectra.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 1204 38961 Low latitude H I Survey Data
software.for 80 459 Two Fortran main codes and several subroutines
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 0.1deg GLONc Galactic Longitude
5- 9 I5 0.01deg GLATc Galactic Latitude
10- 14 I5 0.1km/s Vo *Central Velocity (Local Standard of Rest)
15-1204 238I5 0.1K TA *Antenna temperature
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Note on Vo, TA:
The velocity Vo corresponds to channel#122; channels are spaced 5kHz.
The corresponding VLSRs for the measured antenna temperatures can be
obtained by the following FORTRAN statements:
cvel = Vo * 0.1 ! in units of km/s
do i = 1, 238
VLSR(i)= cvel + (i-122)* 1.0553
enddo
One array of TA was in error and estimated (at 163.5-06.75)
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Brief description of software.for:
FORTRAN codes for use in extracting spectra from the H I surveys of
Heiles and Habing (VIII/7), Parkes (VIII/8), Argentina (VIII/9),
Bell Labs (VIII/10), and this catalog (VIII/11).
History:
* The catalog was received at ADC in 1992; a brief introduction
was added at CDS (Francois Ochsenbein).
* The documentation was added in December 1995 at ADC (C.-H. Joseph Lyu)
One record (#24881, located at 163.5-06.75) was noted as being
wrong.
* November 2003 at CDS (F. Ochsenbein): the bad TA values for the
erroneous record #24881 (163.5-06.75), concerning the values 113 to
238 of the index in the array, have been replaced by the mean of the
adjacent records (corresponding to the galactic locations 163.5-06.50
and 163.5-07.00. The documentation (ReadMe) was revised.
(End) C.-H. Joseph Lyu [Hughes STX/NASA]; Francois Ochsenbein [CDS] 29-Nov-2003