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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Byte-by-byte Description of file: catalog.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- 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
The document above follows the rules of the Standard Description for Astronomical Catalogues; from this documentation it is possible to generate f77 program to load files into arrays or line by line