VIII/61 NAIC 611 MHz Survey Source List (Durdin+ 1975)
The NAIC 611 MHz Multi-beam Sky Survey Source List
Durdin J.M., Pleticha D., Condon J.J., Yerbury M.J., Jauncey D.L., Hazard C.
<National Astronomy and Ionosphere Center Report No. 45 (1975)>
ADC_Keywords: Radio sources
Description:
The 1000 foot Arecibo reflector was used with a multiple feed system
to map the region 0h < RA < 12h, -2d < DEC < +18d at 611 MHz. The
observations were made in meridian transit mode using an array of ten
line feeds with the electric polarization vector in the east-west
plane. The beam power pattern of each feed was approximately Gaussian
and circulary symmetric with a half power beam width of about 12.6
arcmin. A source list was produced containing fluxes and positions of
3118 radio sources stronger than 0.35 Jy. The source list is complete
for strong, unresolved sources. However it is not intended to be
complete for objects highly resolved by the 12.6 arcmin beamsize. The
list's lower limit of 0.35 Jy is about 5 times the average sky
confusion.
The survey was calibrated to the KPW (Kellermann, Pauliny-Toth, and
Williams 1969ApJ...157....1K 1969ApJ...157....1K) flux scale. The secondary calibrators
were ten sources measured at Arecibo at 606 MHz based on the KPW scale
(Condon, Niell and Jauncey 1971). Marked by an asterisk in Table 2,
these sources were too few to be used alone to calibrate all of the
declination strips. Since a more complete list of good calibration
sources did not exist at 611 MHz, the fluxes of 159 additional sources
were independently measured accurate to about 7 percent at Arecibo in
the Fall of 1973. Table 2 gives their assigned fluxes. These sources
were tied to the KPW scale through the ten secondary calibrators.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
report.txt 82 451 Text of NAIC Report No. 45
table2.dat 32 169 Data for 169 flux calibration sources
table3.dat 70 3122 Source List
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See also:
J/ApJS/51/67 : 5 GHz Observations of Arecibo 611 MHz Sources (Lawrence+ 1983)
=1983ApJS...51...67L 1983ApJS...51...67L
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension (1950)
4- 5 I2 min RAm Right Ascension (1950)
7- 10 F4.1 s RAs Right Ascension (1950)
14 A1 --- DE- Declination sign (1950)
15- 16 I2 deg DEd Declination (1950)
18- 19 I2 arcmin DEm Declination (1950)
21- 22 I2 arcsec DEs Declination (1950)
27- 31 F5.2 Jy S611 Assigned 611 MHz flux density
32 A1 --- type [*] indicates secondary calibrator
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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2- 10 A9 --- Name IAU Name (1)
13- 14 I2 h RAh Right Ascension (1950)
16- 17 I2 min RAm Right Ascension (1950)
19- 22 F4.1 s RAs Right Ascension (1950)
24- 27 F4.1 s e_RAs Right Ascension error
30 A1 --- DE- Declination sign (1950)
31- 32 I2 deg DEd Declination (1950)
34- 35 I2 arcmin DEm Declination (1950)
37- 38 I2 arcsec DEs Declination (1950)
40- 42 I3 arcsec e_DEs Declination error
44- 50 F7.3 Jy S611 611 MHz (49.5cm) flux density
51- 57 F7.3 Jy e_S611 Flux density error
58- 62 F5.1 arcmin RAsize Observed size in RA (2)
63- 67 F5.1 arcmin Decsize Observed size in Dec (2)
69 A1 --- Code [CR] Source notes (3)
70 A1 --- Lobe [L] Sidelobe flag (4)
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Note (1): Duplicate source names are appended by the letter 'a' or 'b'
according to increasing right ascension.
Note (2): Full width from Gaussian fitting. An unresolved, unconfused
source would have listed RAsize of 12.6 arcmin and Decsize
of 14.7 arcmin.
Note (3): 'C' indicates the source is confused (parameters are more uncertain
than the quoted errors). 'R' denotes the Rosette Nebula. Four 'R'
entries listed with a flux of 0.0 Jy are the approximate positions of
relative maxima. The entry with an assigned flux of 350 Jy is the
position of the central relative minimum. Width information for this
entry gives the approximate size of the nebula.
Note (4): 'L' indicates the source is at the position of a strong side lobe
of a second source (the fluxes of both sources have been corrected).
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Remarks and Modifications:
Electronic versions of the data tables, prepared by H. Andernach, S.
Trushkin, and N. Zabavskaija, were provided to ADC by H. Andernach.
Andernach noted that errors were possible in this version of table 2,
since it was scanned from a poor quality copy. The table 2 data
presented here were corrected based on a line-by-line comparison with
a good quality copy of the original NAIC Report No. 45.
References:
Condon, J. J., Niell, A. E., and Jauncey, D. L. 1971, Cornell-Sydney
University Astronomy Center, Report No. 218 (Ithaca, N.Y.: Cornell
University).
Kellermann, K. I., Pauliny-Toth, I. I. K., and Williams, P. J. S. 1969,
ApJ, 157, 1 =1969ApJ...157....1K 1969ApJ...157....1K
(End) N. Odegard [SSDOO/ADC] 14-Jan-2000