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I/303           CdC2000 Bordeaux Carte du Ciel catalogue     (Rapaport+, 2006)

The CdC2000 Bordeaux Carte du Ciel catalogue (+11°<delta<+18°). Rapaport M., Ducourant C., Le Campion J.F., Fresneau A., Argyle R.W., Soubiran C., Teixeira R., Camargo J.I.B., Colin J., Daigne G., Perie J.P., Requieme Y. <Astron. Astrophys. 449, 435 (2006)> =2006A&A...449..435R
ADC_Keywords: Surveys ; Positional data Keywords: astrometry - catalogues - reference systems - surveys Description: We present the CdC2000 catalogue issued from the reduction of the complete Bordeaux Carte du Ciel zone observed at the beginning of last century with the Bordeaux astrograph. This catalogue is a positional catalogue of 344780 stars covering the declination zone +11°<delta<+18°. The average epoch of positions is 1914.7. The data are from the 512 Carte du Ciel plates archived at the Bordeaux Observatory and scanned with the APM Cambridge automatic measuring machine. Plates have been individually reduced using the TYCHO-2 Catalogue as astrometric reference. Astrometric standard errors are about 0.10" to 0.12" on positions and 0.6 magnitudes on photographic magnitudes. A detailed study of errors and a comparison of various reduction methods are presented in order to take into account the significant propagated errors from the reference catalogue. The CdC2000 provides positions at the epoch of the plates for 50 682 TYCHO-2 stars. The associated positions are proved to be 0.11" more precise than the positions given by the Tycho-2 catalogue at the epoch of the plates. This work is part of a program of proper motion measurements in the Bordeaux Carte du Ciel zone (PM2000, Cat. I/300). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file cdc2000.dat 75 344781 CdC2000 catalogue
See also: I/259 : The Tycho-2 Catalogue (Hog+ 2000) I/300 : PM2000 Bordeaux Proper Motion catalogue (Ducourant+, 2005) Byte-by-byte Description of file: cdc2000.dat
Bytes Format Units Label Explanations
1- 8 I8 --- CDC2000 Identification number 10- 11 I2 h RAh Mean Right Ascension J2000 at central epoch Ep 13- 14 I2 min RAm Mean Right Ascension J2000 at central epoch Ep 16- 21 F6.3 s RAs [0/60] Mean Right Ascension J2000 at central epoch Ep 23 A1 --- DE- Mean Declination J2000 at central epoch Ep 24- 25 I2 deg DEd Mean Declination J2000 at central epoch Ep 27- 28 I2 arcmin DEm Mean Declination J2000 at central epoch Ep 30- 34 F5.2 arcsec DEs [0/60] Mean Declination J2000 at central epoch Ep 38- 45 F8.3 yr Ep Central epoch for RA and DE 48- 51 F4.1 mag pgmag Photographic magnitude (320nm) 52- 59 F8.2 mas e_Pos Standard error on each coordinate of positions 62- 65 I4 --- TYC1 ? TYC1 Identificator for TYCHO-2 stars 68- 71 I4 --- TYC2 ? TYC2 Identificator for TYCHO-2 stars 75 I1 --- TYC3 ? TYC3 Identificator for TYCHO-2 stars
Acknowledgements: Christine.Ducourant(at)obs.u-bordeaux1.fr
(End) Patricia Vannier [CDS] 22-Nov-2005
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