Large high precision catalogues Large high precision catalogues of stellar data: of stellar data: current status and prospects N.V. Kharchenko 1, A.E. Piskunov 2, and R.-D.Scholz 3 1 Main astronomical observatory, Kiev, Ukraine 2 Institute of astronomy RAS, Moscow, Russia 3 Astrophysikalisches Institut Potsdam, Germany

Introduction In the domain of position, photometric, and kinematic data one can observe during last decade strong Completion of Hipparcos -Tycho mission and construction of a uniform over the sky astrometic and photometric systems Construction of highly automated measuring machines and telescopes for scanning of photographic plates and sky surveying Quality and Quantity growth Hipparcos system high precision coordinates Optical and IR stellar magnitudes Proper motions in Hipparcos system 10 9 objects 

Present-day all-sky catalogues Coordinate system realizatiion Coordinate grid density increase (guiding) Expansion of coordinate system to faint stars Hipparcos family Hipparcos Tycho-2... ASCC-2.5 Photographic Schmidt surveys GSC USNO SuperCosmos CCD/array detector surveys UCAC 2MASS DENIS Stars and star system studies

Catalogue parameters

Dec (J2000) RA (J2000) 2MASSSchmidt plates Galactic Center South Galactic Pole Sky areas in 2MASS and SuperCosmos surveys

Catalogue Survey Emusion/ Band Band width Limiting Declination detector or 0, nm mag deg USNO-B1.0 POSS-I O 103a-O B GSC II POSS-II J IIIa-J Bj SSS SERC J IIIa-J Bj SERC EJ IIIa-J Bj SERC QV IIa-D V SGPl Palomar QV IIa-D V POSS-I 103a-E R POSS-II IIIa-F R ESO-R IIIa-F R AAO-S IIIa-F R ,SGPl POSS-II IV-N I SERC-I IV-N I UCAC2 UCAC CCD Ru MASS 2MASS HgCdTe J detector H Ks DENIS DENIS detector Gunn-i J Ks Photometric systems of all-sky catalogues

Brightness function in selected areas USNO-B1.0 (with PM) USNO-A1.0 UCAC2 2MASS

CMDs of all-sky catalogues in selected areas ASCC-2.5 UCAC2 USNO-B1.0 DENIS 2MASS SSS USNO-B1.0 USNO-A2.0 (black points) &

Proper motions over the sky Catalogue Proper motion source Epochs Completness of PMs in a catalogue Hipparcos Original observations % TYCHO2 Original observations, % Astrographic Catalogue ASCC-2.5 Compilation of Hipparcos, 100 % Tycho-1,-2, AST RC, TRC, PPM, CMC11 data USNO-B1.0 Original measurements of 30 % Schmidt plates with the PMM SSS Original measurements of 65 % Schmidt plates with SuperCOSMOS GSC II Original measurements of Schmidt plates with the GAMMA UCAC2 Original observations, % Original measurements of of Yellow Sky (NPM, SPM) and AGK2 plates with the PMM

Proper motions versus stellar magnitudes in selected areas ASCC-2.5 UCAC2 USNO-B1.0 & SSS (black)

Open cluster Blanco 1 in the ASCC-2.5

ASCC-2.5 UCAC2 Open cluster  Per in the ASCC-2.5 and UCAC2 

Coordinate accuracy versus object density: average, minimum (in GP), maximum (in GC) GSCII

Access to all-sky catalogues Catalogue CDS Vizier ftp home Hipparcos I/ CDS TYCHO2 I/ CDS ASCC-2.5 I/280A + + CDS USNO-A2.0 I/ ftp://ftp.nofs.navy.mil/usnoa USNO-B1.0 I/ SSS GSCII UCAC2 I/ MASS II/ DENIS B/denis + +

Conclusions Prospects Further improving of coordinate and photometric support of catalogues of specific stellar data (spectral, RV, etc.) Completion of SuperCOSMOS catalogue GSC II  GSC 2.3 Problems: Cross-identification of objects at different epochs Absence of deep all-sky multi-vawelength photometric standards