VIII/10 Bell Laboratories H I Profiles (Stark+ 1992)
The Bell Laboratories H I Survey
Stark A.A., Gammie C.F., Wilson R.W., Bally J., Linke R.A.
<Astrophys. J. Suppl., 79, 77 (1992)>
=1992ApJS...79...77S 1992ApJS...79...77S
ADC_Keywords: Radio sources ; Surveys ; Radio lines ; H I data
Description:
This survey consists of H I 21-cm spectra covering galactic latitudes
|b|>10degrees, North of Declination -40deg, observed with the 20-foot
horn reflector at AT&T Bell Laboratories, Crawford Hill. The
instrument beam is 2° (FWHM).
The data consist of 124-channel profiles sorted in Galactic latitude
and longitude; each channel has a width of 5.3km/s. The data were
obtained by holding the telescope fixed and letting the sky drift
through. Then the natural coordinate system for the data is in
equatorial coordinates, so the data are not gridded in Galactic
coordinates.
Note that this catalog represents the Bell Laboratories H I Survey
in a preliminary version; it is superseded by Catalog VIII/28.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 703 22261 The Bell Labs HI Survey
software.for 80 459 Two Fortran main codes and several subroutines
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See also:
VIII/28 : Bell Laboratories H I Survey Maps (Stark+ 1992)
Byte-per-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 mdeg GLONc Galactic longitude, in 0.001 degrees
7- 12 I6 mdeg GLATc Galactic latitude , in 0.001 degrees
13- 14 I2 h RAh Right ascension (hours) [B1950]
15- 16 I2 min RAm Right ascension (minutes)
17- 18 I2 s RAs Right ascension (seconds)
19 A1 --- DE- Declination sign
20- 21 I2 deg DEd [0,90] Declination (degrees) [B1950]
22- 23 I2 arcmin DEm Declination (minutes)
24- 25 I2 arcsec DEs Declination (seconds)
26- 29 I4 0.1 Ch0 *Central channel
30- 35 I6 dam/s V0 *Velocity of Chan0 in LSR, in 0.01km/s
36- 39 I4 s tInt Integration Time
40- 44 I5 0.01K rms3 3 times rms noise
45- 47 I3 --- Chan Channel Number in base
48- 53 I6 10-4 a1 0.0001 narrow baseline coefficients
54- 59 I6 10-4 a2 0.0001 narrow baseline coefficients
60- 65 I6 10-4 a3 0.0001 narrow baseline coefficients
66- 71 I6 10-4 b1 0.0001 broad baseline coefficients
72- 77 I6 10-4 b2 0.0001 broad baseline coefficients
78- 83 I6 10-4 b3 0.0001 broad baseline coefficients
84-703 124I5 0.01K TA *Antenna temperatures
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Note on V0, Ch0, TA:
V0 represents the LSR velocity corresponding to the Chan0 point.
The VLSRs for the measured antenna temperatures can be obtained
by the following FORTRAN statements:
ch0 = real(ich0)/10. ! "pixel" position
cvel = real(icv)/100. ! in km/s
do i = 1,124
vlsr(i) = cvel + (real(i)-ch0)*5.2767
enddo
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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),
this catalog (VIII/10), and Weaver and Williams (VIII/11).
(End) Francois Ochsenbein [CDS] 16-Mar-1993