J/A+AS/35/23 Survey of the Galactic Plane at 4.875 GHz (Altenhoff+ 1979)
Survey of the Galactic Plane at 4.875 GHz
Altenhoff W.J., Downes D., Pauls T., Schraml J.
<Astron. Astrophys. Suppl. Ser. 35, 23 (1979)>
=1979A&AS...35...23A 1979A&AS...35...23A
ADC_Keywords: Radio sources; Galactic plane
Keywords: galactic radio sources; source surveys; galactic structure
Description:
A survey of the galactic plane was made with the Effelsberg 100-m
telescope at a frequency of 4.875 GHz with a beamwidth of 2.6 arcmin.
Table 1 is a list of 1186 radio sources in the surveyed area
l = 357.5 to 60 deg, b = -1 to +1 deg. The primary calibration source
was NGC 7027, which was assumed to have a flux density of 5.9 Jy
(1 Jy = 10-26W.m-2.Hz-1). The uncertainty in day-to-day thermal
calibration was ± 5 to 10%.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 1186 Data for 1186 radio sources
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See also:
VIII/20 : A Catalogue of 5 GHz Galactic Plane Sources (Haynes+ 1979)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 deg GLON Galactic longitude (1)
8- 13 F6.3 deg GLAT Galactic latitude (1)
15- 16 I2 h RAh Right Ascension (1950)
18- 19 I2 min RAm Right Ascension (1950)
21- 24 F4.1 s RAs Right Ascension (1950)
26 A1 --- DE- Declination sign (1950)
27- 28 I2 deg DEd Declination (1950)
30- 31 I2 arcmin DEm Declination (1950)
33- 34 I2 arcsec DEs Declination (1950)
36- 42 F7.2 Jy Speak ? Peak intensity at 4.875GHz after
background subtraction (2)
44- 47 F4.1 arcmin Diam ? Source diameter as observed with
2.6' beam (3)
49- 51 A3 --- n_Diam ? Diameter for 0.1 Jy sources,
P: point source, Ext: extended
54- 60 A7 --- Remarks ? Source name, parameter determination (4)
61- 66 F6.2 Jy Flux ? Integrated flux at 4.875GHz (5)
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Note (1): Accurate to ±0.005 degree.
Note (2): Units are Jy for an equivalent point source. Uncertainty is ∼5%
for the values derived from Gaussian fits (see Remarks).
Note (3): Geometric mean of half-power widths in longitude and latitude.
Uncertainty is ∼10% for values derived from Gaussian fits (see
Remarks). The other values were estimated to the nearest 0.5' from
contour maps, and should be regarded with caution.
Note (4): The symbols have the following meaning:
One asterisk: Coordinates, Peak, and Diam are from Gaussian fit.
Two asterisks: Coordinates are from contour map; Peak and Diam from
Gaussian fit.
No asterisk: Coordinates, Peak, and Diam are from contour maps.
Note (5): Calculated by S. Trushkin as
Flux = Peak * (Diam/2.6')2.
Integrated fluxes were not included in the table published by
Altenhoff et al., because "Diameters measured from contour maps are
notoriously unreliable, and we expect that synthesis observations with
beamwidths of a few arc sec would resolve many of the sources into
compact components. We therefore did not de-convolve the apparent
diameters, or estimate integrated fluxes for the sources."
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Acknowledgements:
An electronic version of the data table, prepared by N. Zabavskaya and
S. Trushkin (12/96), was provided to ADC by H. Andernach.
* 03-Dec-2002: following a note by Anish Roshi (NRAO), a verification
of the position revealed 11 errors in table1 for records number
13, 39, 43, 70, 73, 78, 92, 109, 110, 120, and 130 in table1.dat
* 31-Dec-2002: following a note by H. Andernach, 7 other errors in positions
corrected for records 24, 32, 35, 82, 101, 289, 813 in table1.dat
* 07-Jan-2003: a last error was detected by H. Andernach in 25.610-0.032
in the flux value (0.2 instead of 0.5)
(End) N. Odegard [SSDOO/ADC] 06-Oct-1999