ADC/CDS Standard Document for Catalog:/catalogs/8/8047/
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VIII/47 Galactic 21-cm line Survey (Westerhout+ 1982)
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The Maryland-Green Bank Galactic 21-cm line survey
Westerhout G., Wendlandt H.U.
<Astron. Astrophys. Suppl. 49, 137 (1982)>
=1982A&AS...49..137W
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ADC_Keywords: H I data; Surveys; Galactic plane; Atlases
Description:
This catalog presents a completely sampled survey of 21-cm line
profiles extending from Galactic longitude 11 to 235 degrees
and nominally covering a range between latitude +2 and - 2
degrees. It was observed in 1971-72 with the newly resurfaced
92-m (300-foot) telescope of the National Radio Astronomy
Observatory (NRAO) in Green Bank, W.V. The spatial resolution
is 0.22 degrees (13 arcmin), and the velocity resolution is
2 km/s. The line profiles have
260 values of Brightness Temperature at 1 km/s
intervals, and at spacings of 0.1 degree in longitude and 0.1
degree in latitude. The r.m.s per data point varies from 1.0K
at low declinations to 0.5K at high declinations. The maps
at constant Galactic longitude published in the printed version
are at intervals of 0.2 degrees in longitude; the spectra in
this catalog are therefore spatially twice as dense. The catalog
is arranged in two forms: as FITS data cubes, and as FITS binary
tables. The cubes contain three-dimensional arrays of spectra
for various longitude ranges. The binary tables contain spectra
at constant Galactic latitude, along with coordinate and velocity
information necessary for the interpretation of individual spectra.
A detailed description of the telescope beam characteristics
and the derivation of the temperature scale is given by
Westerhout, G., Mader, G.L., and Harten, R.H. (Astron. and
Astrophys. Suppl. 49, 137-141, 1982). Temperature scales of this
and several other 21-cm line surveys were compared by Harten,
R.H., Westerhout, G., and Kerr, F.J. (Astron.J. 80, 307-310,
1975) and found to agree to within 5 %.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
l011_020.fit 2880 522 FITS cubes for l = 11.0-19.9 deg
l020_040.fit 2880 1158 l = 20.0-39.9 deg
l040_060.fit 2880 1411 l = 40.0-59.9 deg
l060_080.fit 2880 1700 l = 60.0-79.9 deg
l080_100.fit 2880 1700 l = 80.0-99.9 deg
l100_120.fit 2880 1700 l = 100.0-119.9 deg
l120_140.fit 2880 1700 l = 120.0-139.9 deg
l140_160.fit 2880 1591 l = 140.0-159.9 deg
l160_180.fit 2880 1591 l = 160.0-179.9 deg
l180_200.fit 2880 1591 l = 180.0-199.9 deg
l200_220.fit 2880 1591 l = 200.0-219.9 deg
l220_235.fit 2880 1202 l = 200.0-235.0 deg
b_m22.fit 2880 271 FITS tables for b = -2.2 deg
b_m21.fit 2880 271 b = -2.1 deg
b_m20.fit 2880 271 b = -2.0 deg
b_m19.fit 2880 648 b = -1.9 deg
b_m18.fit 2880 649 b = -1.8 deg
b_m17.fit 2880 648 b = -1.7 deg
b_m16.fit 2880 649 b = -1.6 deg
b_m15.fit 2880 824 b = -1.5 deg
b_m14.fit 2880 827 b = -1.4 deg
b_m13.fit 2880 827 b = -1.3 deg
b_m12.fit 2880 827 b = -1.2 deg
b_m11.fit 2880 827 b = -1.1 deg
b_m10.fit 2880 827 b = -1.0 deg
b_m09.fit 2880 827 b = -0.9 deg
b_m08.fit 2880 829 b = -0.8 deg
b_m07.fit 2880 829 b = -0.7 deg
b_m06.fit 2880 829 b = -0.6 deg
b_m05.fit 2880 829 b = -0.5 deg
b_m04.fit 2880 827 b = -0.4 deg
b_m03.fit 2880 828 b = -0.3 deg
b_m02.fit 2880 829 b = -0.2 deg
b_m01.fit 2880 830 b = -0.1 deg
b_00.fit 2880 831 b = 0.0 deg
b_01.fit 2880 831 b = 0.1 deg
b_02.fit 2880 831 b = 0.2 deg
b_03.fit 2880 835 b = 0.3 deg
b_04.fit 2880 833 b = 0.4 deg
b_05.fit 2880 835 b = 0.5 deg
b_06.fit 2880 829 b = 0.6 deg
b_07.fit 2880 834 b = 0.7 deg
b_08.fit 2880 835 b = 0.8 deg
b_09.fit 2880 835 b = 0.9 deg
b_10.fit 2880 836 b = 1.0 deg
b_11.fit 2880 836 b = 1.1 deg
b_12.fit 2880 836 b = 1.2 deg
b_13.fit 2880 836 b = 1.3 deg
b_14.fit 2880 837 b = 1.4 deg
b_15.fit 2880 837 b = 1.5 deg
b_16.fit 2880 837 b = 1.6 deg
b_17.fit 2880 639 b = 1.7 deg
b_18.fit 2880 639 b = 1.8 deg
b_19.fit 2880 639 b = 1.9 deg
b_20.fit 2880 639 b = 2.0 deg
b_21.fit 2880 639 b = 2.1 deg
b_22.fit 2880 639 b = 2.2 deg
b_23.fit 2880 632 b = 2.3 deg
b_24.fit 2880 629 b = 2.4 deg
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Remarks:
At the edges of the survey, near l=11 to 12.5 degrees and l=233.5
to 235 degrees, not all Galactic longitudes for a given latitude
were measured, so that cross sections at constant b have gaps
in l. Near l=60, b=-1.5 to -1.7 and l= 64 to 66, b=+1.7 to +2.4 the
survey coverage in b widens from 3.2 to 4.7 degrees.
Over most of the range l=12 to 234 the survey covers a strip
of 4.5 degrees in Galactic latitude centered on the Galactic
plane. In more detail, the survey covers the following longitudes
and latitudes:
>From l=11.0 to l= 64.1, b=+1.7 and l= 12.5 to l= 59.7, b=-1.5
>From l=64.2 to l=235.0, b=+2.4 and l= 59.8 to l=131.9, b=-2.2
and l=132.0 to l=233.2, b=-1.9
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(End) Gart Westerhout [retired] 10-Jun-1997