J/A+AS/137/269 Calern Observatory absolute declinations (Martin+, 1999)
Absolute declinations with the photoelectric astrolabe at
Calern Observatory (OCA)
Martin V.A.F., Leister N.V., Vigouroux G., Furia M., Journet A.
<Astron. Astrophys. Suppl. Ser. 137, 269 (1999)>
=1999A&AS..137..269M 1999A&AS..137..269M (SIMBAD/NED BibCode)
ADC_Keywords: Positional data ; Fundamental catalog
Keywords: astrometry - catalogues - reference system
Abstract:
A regular observational programme with a photoelectric astrolabe have
been performed at ``Observatoire du Calern" (Observatoire de la Cote
d'Azur, OCA, φ=+43°44'55.011"; λ=-0h27m42.44s,
Calern, Caussols, France) for the last twenty years. It has been
almost fully automatized between 1984 and 1987. Since 1988 the
photoelectric astrolabe was used without any modification. In addition
to determining the daily orientation of the local vertical, the yearly
analysis of the residuals permits to derive corrections to the used
star catalogue Vigouroux et al. (1992A&AS...96..477V 1992A&AS...96..477V). A global
reduction method was applied for the ASPHO observations. The new form
of the equations Martin & Leister (1997A&AS..126..169M 1997A&AS..126..169M) give us the
possibility of using the entire set of the observing program using
data taken at two zenith distances (30° and 45°). The program
contains about 41648 stars' transits of 269 different stars taken at
``Observatoire du Calern" (OCA). The reduction was based on the
HIPPARCOS system. We discuss the possibility of computing absolute
declinations through stars belonging simultaneously to the 30° and
45° zenith distances programmes. The absolute declination
corrections were determined for 185 stars with precision of 0.027" and
the value of the determined equator correction is -0.018"±0.005".
The instrumental effects were also determined. The mean epoch is
1995.29.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 67 271 Absolute declinations
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIPPARCOS (Cat. I/239) star number
8- 11 F4.2 mag Vmag Visual magnitude
13- 16 F4.1 mag B-V B-V colour index
18- 19 I2 h RAh Right ascension (J2000.0)
21- 22 I2 min RAm Right ascension (J2000.0)
24- 29 F6.3 s RAs Right ascension (J2000.0)
31 A1 --- DE- Declination sign (J2000.0)
32- 33 I2 deg DEd Declination (J2000.0)
35- 36 I2 arcmin DEm Declination (J2000.0)
38- 42 F5.2 arcsec DEs Declination (J2000.0)
44- 46 I3 mas DRA Position correction of right ascension (DRAcosDE)
48- 49 I2 mas e_DRA rms uncertainty on DRA
51- 53 I3 mas DDE ? Position correction of absolute declination
55- 56 I2 mas e_DDE ? rms uncertainty on DDE
58- 67 F10.2 d HJD Heliocentric Julian Date of the observation
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Acknowledgements: Vera Martin
(End) Patricia Bauer [CDS] 04-May-1999