/ftp/cats/I/334



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I/334             W1J00 and W2J00 Transit Circle Catalogs      (Rafferty+, 2016)
The following files can be converted to FITS (extension .fit or fit.gz)
	w1j00sta.dat w1j00sol.dat w2j00sta.dat w2j00sol.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/334
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 3 cats archive 4096 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 501 Dec 19 2022 .message -r--r--r-- 1 cats archive 25545 Jun 10 2016 ReadMe -rw-r--r-- 1 cats archive 1821 Jun 10 2016 +footg5.gif -rw-r--r-- 1 cats archive 39578 Jun 10 2016 +footg8.gif -r--r--r-- 1 cats ftp 306810 Jun 10 2016 w1j00sol.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats ftp 857506 Jun 10 2016 w1j00sta.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats ftp 740224 Jun 10 2016 w2j00sol.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats ftp 7675950 Jun 1 2016 w2j00sta.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/334 W1J00 and W2J00 Transit Circle Catalogs (Rafferty+, 2016) ================================================================================ W1J00 results of the Observations made with the Six-inch Transit Circle 1977-1982 AND W2J00 results of Pole-to-Pole Observations made with the Six-inch and Seven-inch Transit Circles 1985-1996. Rafferty T.J., Holdenried E.R., Urban S.E. <Publ. USNO, 2nd series, vol. XXVII (part 1), Washington (2016)> Holdenried, E.R. and Rafferty, T.J. <Publ. USNO, 2nd series, vol. XXVII (part 2), Washington (2016)> =2016yCat.1334....0R =2016PUSNO..27a...1R +2016PUSNO..27b...1H ================================================================================ ADC_Keywords: Positional data ; Fundamental catalog ; Historical catalog ; Meridian observations ; Minor planets ; Solar system Abstract: W1J00. We present the result of observations made with the Six-inch Transit Circle in Washington, D.C., between September 1977 and July 1982. The catalog, called W1J00, contains mean positions of 7267 stars, all but five are north of -30 degrees declination, and 4383 observations of solar system objects. Positions of stars are for mean epoch of observation, on equator and equinox J2000.0. Positions of solar system objects are apparent places. Error estimates are about 100mas per coordinate for the majority of stars. W2J00. We present the result of observations made with the Six-inch Transit Circle in Washington, D.C. and the Seven-inch Transit Circle at the Black Birch station near Blenheim, New Zealand between April 1985 and February 1996. The catalog, called W2J00, contains mean positions of 44,395 globally distributed stars, 5048 observations of the planets, and 6518 observations of the brighter minor planets. Positions of stars are for mean epoch of observation, on equator and equinox J2000.0. Positions of solar system objects are apparent places. Error estimates are about 75mas per coordinate for the majority of stars. Description: The W1J00, named because it was the first (of two) Washington transit circle catalog to be referred to the Equinox of J2000.0, is the result of observations made with the Six-inch Transit Circle in Washington, D.C., between September 1977 and July 1982. The observing program was structured to be absolute, in the sense that the positions were not explicitly relying on any previous observations. The absolute positions were defined with respect to an internally consistent frame that was unique to the particular instrument. Following the reductions, comparisons with stars from the Hipparcos Catalogue (European Space Agency 1997) revealed unaccounted for systematic differences on the level of 100-200mas. It was decided, therefore, to include data on both the absolute positions reduced in way common to many past Washington transit circle catalogs, as well as the positions differentially adjusted to the system of the Hipparcos Catalog. The W1J00 contains mean positions of 7267 stars and 4383 observations of solar system objects. The majority of the stars fall into two categories; those from the Fifth Fundamental Catalog (FK5; Fricke et al 1988), and those from the Catalog Of 3539 Zodiacal Stars For The Equinox 1950.0 (Robertson 1940). The solar system objects include the Sun, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, eight minor planets (Eunomia, Flora, Hebe, Iris, Juno, Metis, Pallas, and Vesta), and the dwarf planet Ceres. Characteristics of the W1J00 catalog: Category Range Average ------------------------------------------------------------- Magnitudes -1.6 to 10.4 7.18 RA standard errors of the mean 15 to 460 mas 98 mas Dec standard errors of the mean 10 to 400 mas 107 mas RA Number of observations / star 3 to 187 10 Dec Number of observations / star 2 to 179 10 Declination coverage -39 to +90 degrees ------------------------------------------------------------- Details of the W1J00 can be found in Rafferty, Holdenried, and Urban (2016, Publ. USNO, 2nd series, vol. XXVII (part 1)). The W2J00 is the result of observations made with the Six-inch Transit Circle in Washington, D.C., and the Seven-inch Transit Circle at the Black Birch station near Blenheim, New Zealand. It is named as such because it was the second (of two) transit circle catalogs to be referred to the Equinox of J2000.0, and reduced at the Washington D.C. headquarters of the U.S. Naval Observatory. It is sometimes referred to as the "Pole-to-Pole" program due to the fact that the telescopes were situated at latitudes such that a fundamental determination could be made of the azimuth using circumpolar stars of both the northern and southern sky. The observations were made between April 1985 and February 1996. The W2J00 project is the latest and largest of a long series of transit circle catalogs produced by the U.S. Naval Observatory. It is also, because of advancing technologies, certainly the last. The observing program was structured to be absolute, in the sense that the reported positions were not to explicitly rely on previous observations. However, with the availability of Hipparcos observational data, it was decided to differentially adjust the observations to the ICRF using the Hipparcos star positions (ESA, 1997, Cat. I/239). A catalog on the ICRF was judged be more useful than one tied to the dynamical reference frame, as was the tradition. The W2J00 contains mean positions of 44,395 globally distributed stars, 5048 observations of the planets, and 6518 observations of the brighter minor planets. The majority of stars are FK stars (Fricke, et al., 1988, Cat. I/149 and 1991, Cat. I/175) and International Reference Stars (IRS) (Corbin, 1991, Cat. I/172). The solar system objects include Mars, Jupiter, Saturn, Uranus, Neptune, twelve minor planets (Amphitrite, Eunomia, Flora, Hebe, Hygiea, Iris, Juno, Melphomene, Metis, Nemausa, Pallas, and Vesta), and the dwarf planet Ceres. Daytime observations of the Sun, Mercury, Venus, Mars, and bright stars were made but not included in the final catalog due to the problems inherent in reducing observations made in the daylight. The W2J00 observing program used both the Six-inch Transit Circle and Seven-inch Transit Circle. Final positions are a combination of observations from both telescopes (for those stars in common). The authors have decided to present not only the combined positions, but the individual telescope's positions should future researchers decide to investigate the data based on which instrument was used. Characteristics of the W2J00 catalog: Category Range Average ------------------------------------------------------------- Magnitudes -1.6 to 9.91 6.84 RA standard errors of the mean 3 to 441 mas 68 mas Dec standard errors of the mean 1 to 448 mas 76 mas RA Number of observations / star 3 to 411 14 Dec Number of observations / star 2 to 418 14 Declination coverage -90 to +90 degrees ------------------------------------------------------------- Details of the W2J00 can be found in Holdenried and Rafferty (2016, PUSNO, 2nd series, vol. XXVII (part 2)).