J/ApJS/51/67 5 GHz Observations of Arecibo 611 MHz Sources (Lawrence+ 1983)
5 GHz observations of sources in the Arecibo 611 MHz survey
Lawrence C.R., Bennett C.L., Garcia-Barreto J.A., Greenfield P.E., Burke B.F.
<Astrophys. J. Suppl. Ser. 51, 67 (1983)>
=1983ApJS...51...67L 1983ApJS...51...67L
ADC_Keywords: Radio sources
Description:
The Arecibo 611 MHz survey of Durdin et al. (1975) listed 3118 radio
sources stronger than 0.35 Jy in the region -3d to +19d and 22h to
13h. Of these sources, 2911 have been observed using the NRAO 300 foot
transit telescope at 4755 MHz. Positions, fluxes, and spectral indices
are given for the 2661 detected sources. The beamwidth of the 300 foot
telescope is nominally 2.8 arcmin FWHM at 6 cm, compared to the 12
arcmin beamwidth of the Arecibo survey, allowing a significant
improvement in source positions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 126 Data for calibration sources
table2.dat 36 133 Accurately known source positions
table4.dat 100 3118 Source List
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See also:
VIII/61 : The NAIC 611 MHz Multi-beam Sky Survey Source List (Durdin+ 1975)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Source Name
12- 13 I2 h RAh Right Ascension (1950)
14- 15 I2 min RAm Right Ascension (1950)
16- 20 F5.2 s RAs Right Ascension (1950)
21 A1 --- DE- Declination sign (1950)
22- 23 I2 deg DEd Declination (1950)
24- 25 I2 arcmin DEm Declination (1950)
26- 29 F4.1 arcsec DEs Declination (1950)
31- 35 F5.2 Jy S4755 ? 4755 MHz flux density
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Source Name
10- 11 A2 --- r_Name Origin of position (1)
14- 15 I2 h RAh Right Ascension (1950)
16- 17 I2 min RAm Right Ascension (1950)
18- 23 F6.3 s RAs Right Ascension (1950)
25 A1 --- DE- Declination sign (1950)
26- 27 I2 deg DEd Declination (1950)
28- 29 I2 arcmin DEm Declination (1950)
30- 34 F5.2 arcsec DEs Declination (1950)
36 A1 --- Acc Accuracy (2)
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Note (1): the following codes are used:
VC = VLA calibrator
V = observed by Lawrence et al. at the VLA
P = optically identified Parkes source (Condon et al. 1977)
Note (2): the following codes are used:
A = RA originally tabulated to 0.001 s accuracy, Dec originally
tabulated to 0.01 arcsec accuracy
B = RA originally tabulated to 0.01 s accuracy, Dec originally
tabulated to 0.01 arcsec accuracy
C = RA originally tabulated to 0.01 s accuracy, Dec originally
tabulated to 0.1 arcsec accuracy
D = RA originally tabulated to 0.1 s accuracy, Dec originally
tabulated to 0.1 arcsec accuracy
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 A1 --- r_Name Note on Name (1)
2- 10 A9 --- Name Source Name in IAU format (2)
11 A1 --- Extent [E] indicates source is extended in RA (3)
13- 14 I2 h RAh Right Ascension (1950) (4)
15- 16 I2 min RAm Right Ascension (1950)
17- 20 F4.1 s RAs ? Right Ascension (1950)
22- 26 F5.1 s e_RAs ? Error in RA (3)
28 A1 --- DE- ? Declination sign (1950) (4)
29- 30 I2 deg DEd ? Declination (1950)
31- 32 I2 arcmin DEm ? Declination (1950)
33- 34 I2 arcsec DEs ? Declination (1950)
36- 38 I3 arcsec e_DEs ? Error in Dec. (3)
40- 44 I5 mJy S4755 ? 4755 MHz flux density
46- 49 I4 mJy e_S4755 ? 4755 MHz flux error
51- 55 I5 mJy S611 ? 611 MHz flux density (5)
57- 59 I3 mJy e_S611 ? 611 MHz flux error (5)
62- 66 F5.2 --- Sp-Index ? 611-4755 MHz spectral index (6)
67- 70 F4.2 --- e_Sp-Index ? Spectral index error
72- 77 F6.1 s RAdiff ? Arecibo RA - Green Bank RA
79- 82 I4 arcsec DEdiff ? Arecibo Dec. - Green Bank Dec.
84- 88 F5.1 s RAerr ? Arecibo RA error
89- 92 I4 arcsec DEerr ? Arecibo Dec. error
95 I1 --- o_RAs ? No. of observations averaged in RA
96 I1 --- o_DEs ? No. of observations averaged in Dec.
97 I1 --- o_S4755 ? No. of observations averaged in S4755 (7)
99-100 A2 --- Rem ? Source note (8)
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Note (1): the following symbols are used for the origin of the name:
A = IAU Name is based on Arecibo position. Such sources were
unobserved or undetected at 5 GHz.
G = IAU Name is based on Green Bank position.
X = IAU Name is based on Green Bank right ascension and Arecibo
declination. Lawrence et al. were unable to determine the
declination of such sources.
Note (2): Duplicate source names are appended by the letter 'a' or 'b'
according to increasing right ascension.
Note (3): For sources that are extended in right ascension (Extent=E),
right ascension, declination, and flux are each tabulated as
mid value ± (half of the measured range of values).
A large R.A. range ( > 10 or 20 s) is indicative of either
complicated structure in a single source, or multiple sources
that could not be untangled.
Note (4): For unobserved or undetected sources (those with r_Name=A)
the right ascension and declination values listed are from
the 611 MHz Arecibo observations of Durdin et al. (1975).
Note (5): 611 MHz flux and error from Durdin et al. (1975), listed only
for sources unobserved or undetected at 5 GHz.
Note (6): Defined such that S ∼ nu^(-alpha).
Note (7): Or number of times the source was observed, if the source was
not detected (i.e., if code=ND)
Note (8): the symbols have the following meaning:
XR = Possibly extended in R.A. or confused
XD = Possibly extended in Dec.
VA = Possibly variable
ND = No detection (detection limit depends strongly on source extension)
NO = Not observed
RO = Rosette Nebula
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Remarks and Modifications:
Electronic versions of the data tables, prepared by H. Andernach and
S. Trushkin, were provided to ADC by H. Andernach. They made the
following corrections to the published table 4 data, which are
retained in the ADC version:
A0515+053 051534.0+052110 is actually at +06d21' (see GB6, Texas,...).
Name and DEC corrected to A0515+063 051534.0+062110 in present version.
Four IAUnames were duplicate for neighboring sources. These were appended
here by a letter 'a' or 'b' in order of increasing RA_1950.
A2302+025 (230252.1+023524) was corrected to A2302+029 (230252.1+025524)
for consistency with Durdin et al. (1975).
Due to a printer's error, column 17 on page 78 was moved up one line
in the original publication (see the erratum, Lawrence et al. (1983)
ApJS, 52, 182 =1983ApJS...52..182L 1983ApJS...52..182L). That error has been corrected in
the electronic version, and in reprints of the paper.
References:
Condon, J. J., Hicks, P. D., and Jauncey D. L., 1977, AJ, 82, 692
=1977AJ.....82..692C 1977AJ.....82..692C
Durdin, J. M., Pleticha, D., Condon, J. J., Yerbury, M. J., Jauncey, D.L.,
Hazard C., 1975, National Astronomy and Ionosphere Center Report No. 45
(End) N. Odegard [SSDOO/ADC] 24-Feb-2000