J/AZh/81/1032 VLBI Position Measurements (Titov, 2004)
Construction of a Celestial Coordinate Reference Frame from VLBI Data.
Titov O.A.
<Astron. Zh. 81, 1032 (2004)>
=2004AZh....81.1032T 2004AZh....81.1032T
=2004ARep...48..941T 2004ARep...48..941T
ADC_Keywords: Radio sources ; Positional data ; VLBI
Abstract:
A large number (∼2 million) of VLBI observations have been reduced in
order to re ne the measured coordinates of the observed radio sources.
The data reduction was carried out in the OCCAM package using the least
squares colocation method. Corrections to the coordinates of 642
objects were derived. The accuracy of the catalog is no worse than
0.2 milliseconds of arc for stable sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 43 642 Corrected positions of 642 objects
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See also:
I/251 : VLBI International Celestial Reference Frame, ICRF (Ma+, 1997)
J/A+A/312/1031 : Positions + proper motions of radio stars (Argyle+, 1996)
J/A+A/355/398 : Celestial Ephemeris Origin definition (Capitaine+, 2000)
J/A+AS/122/529 : Radio stars for linking Celestial Ref. Frame (Walter+ 1997)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Radio source designation
10- 11 I2 h RAh Right ascension (J2000.0)
13- 14 I2 min RAm Right ascension (J2000.0)
16- 24 F9.6 s RAs Right ascension (J2000.0)
29 A1 --- DE- Declination sign (J2000.0)
30- 31 I2 deg DEd Declination (J2000.0)
33- 34 I2 arcmin DEm Declination (J2000.0)
36- 43 F8.5 arcsec DEs Declination (J2000.0)
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History:
Copied at http://astro.pu.ru/astro/win/researches/ivs.html
(End) Patricia Vannier [CDS] 24-Feb-2005