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J/A+A/312/1031      Positions & proper motions of radio stars    (Argyle+, 1996)

Comparison of the Carlsberg optical references frame with the International celestial reference frame Argyle R.W., Einicke O.H., Pilkington J.D.H., Morrison L.V., Fabricius C., Helmer L. <Astron. Astrophys. 312, 1031 (1996)> =1996A&A...312.1031A (SIMBAD/NED BibCode)
ADC_Keywords: Nebulae ; Positional data Keywords: astrometry - references frames Description: The optical positions of 63 extragalactic nebulae measured in the frame defined by the annual series of Carlsberg Meridian Catalogues Nos 1-8 are compared with their VLBI radio positions in the International Celestial Reference Frame. The differences between these radio and optical positions are interpreted as showing the global distortion of the Carlsberg optical frame, which is linked to that of the FK5. North of the equator the Carlsberg optical frame is within 0.05" of the ICRF; but south of the equator it deviates by 0.07" in right ascension and 0.10" in declination. The general form of the deviations follow those of the FK5, which are revealed in a recent comparison of FK5 with a preliminary version of the Hipparcos catalogue (H30). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 75 63 Carlsberg optical positions of ICRF sources and differences, radio minus optical table3 80 26 Carlsberg optical positions and proper motions of radio stars
See also: I/213 : CMC8 (8th Carlsberg Meridian Catalog, 1994) I/205 : CMC7 (7th Carlsberg Meridian Catalogue, 1993) I/189 : CMC6 (6th Carlsberg Meridian Catalogue, 1992) I/170 : CMC5 (5th Carlsberg Meridian Catalogue, 1991) I/147 : CMC4 (4th Carlsberg Meridian Catalogue, 1989) Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 20 A20 --- Name Name of radio source (IAU nomenclature) 24- 25 I2 h RAh Right ascension (J2000) 27- 28 I2 min RAm Right ascension (J2000) 30- 35 F6.3 s RAs Right ascension (J2000) 39 A1 --- DE- Declination sign 40- 41 I2 deg DEd Declination (J2000) 43- 44 I2 arcmin DEm Declination (J2000) 46- 50 F5.2 arcsec DEs Declination (J2000) 55 I1 --- Nplate ? Number of plates 59- 63 F5.2 arcsec DRA Delta RA (radio-optical) 66- 70 F5.2 arcsec DDE Delta DE (radio-optical)
Byte-by-byte Description of file: table3
Bytes Format Units Label Explanations
1- 11 A11 --- Name Name of radio star 12- 13 I2 h RAh Right ascension (J2000) 15- 16 I2 min RAm Right ascension (J2000) 18- 23 F6.3 s RAs Right ascension (J2000) 26- 32 F7.4 s/yr pmRA Proper motion in right ascension 35- 39 F5.2 yr EpRA-1900 Epoch of RA (1900+) 42 A1 --- DE- Declination sign 43- 44 I2 deg DEd Declination (J2000) 46- 47 I2 arcmin DEm Declination (J2000) 49- 53 F5.2 arcsec DEs Declination (J2000) 56- 61 F6.3 arcsec/yr pmDE Proper motion in declination 64- 68 F5.2 yr EpDE-1900 Epoch of DE (1900+) 70- 74 F5.2 arcsec DRA Delta RA(radio-optical) 76- 80 F5.2 arcsec DDE Delta Dec(radio-optical)
Courtesy: R.W. Argyle,
(End) Patricia Bauer [CDS] 11-Mar-1996
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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