1207 I/207 Preliminary list from Tycho observations J L Halbwachs G Baessgen U Bastian D Egret E Hoeg F van Leeuwen C S Petersen P Schwekendiek A Wicenec Astron. Astrophys. 281, L25-L28 ??? ??? 1994 1994A&A...281L..25H I/196 : Hipparcos Input Catalogue, Version 2 (Turon+, 1993) I/197 : Tycho Input Catalogue, Revised version (Egret+ 1992) Positional data Magnitudes The selection of the stars of the Tycho program is mainly based on the Tycho input catalogue (TIC), prepared by Egret et al. (1992) from existing ground-based catalogues. The TIC is far to be the definitive list of the stars that will appear in the final Tycho catalogue however. The number of stars included within (3 million) is several times larger than the number eventually expected. The selection of the TIC stars that will remain in the final catalogue is planned in two steps : The former is the "Recognition" that is based on the first year of the scientific mission. The latter step of selection is the final reduction of the Tycho data, which will require a few more years. The recognition was completed in 1992, and, among the 3,154,204 stars of the TIC, about two third were not found in the observations. This catalogue presents the 1,049,971 stars that are still in the programme. The selection is nor definitive, nor complete; but it should contain only a small percentage of stars that will still be discarded. On another side, some stars missing in the TIC have been added to the Tycho program, but the expected number of additional stars to appear in the final catalogue should be about 5 % or less. The list was announced in Halbwachs et al (1994). It is completed with data (coordinates and magnitudes) from the main file of the Tycho Input Catalogue. The cross-identifications with the Hipparcos Input Catalogue or with the INCA database included in catalogue I/197/ are not repeated here.

TICID1 GSC region number --- TICID2 GSC running number in region --- RA10mas Right ascension J2000.0, Epoch=1990, in 0.01arcsec 10mas SPD10mas South Polar Distance (=Dec+90) Epoch 1990, in 0.01arcsec 10mas e_pos Error on position in 0.01arcsec 10mas e_B Error on B mag. in 0.01 mag. (0=unknown) .01mag B B magnitude in 0.01 mag. (0=unknown) .01mag e_V Error on V mag. in 0.01 mag. (0=unknown) .01mag V V magnitude in 0.01 mag. (0=unknown) .01mag Flag1 FK5 star --- Flag2 IRS star --- Flag3 Photometric standard for Tycho --- Flag4 Monitor star : random set --- Flag5 Monitor star : selected from TIC flags --- Flag6 Monitor star : NGC, ADS system --- Flag7 Photometric star --- Flag8 Monitor star (logical OR of #1 to #6) --- Flag9 GSC/INCA discrepancy --- Flag10 Star selected in the Recognition process --- Flag11 GSC/INCA magnitude discrepancy --- Flag12 INCA (or CDA) entry NOT in GSC 1.0 --- Flag13 Source of position (0: GSC; 1: INCA) --- Flag14 -id.- for B magnitude --- Flag15 -id.- for V magnitude --- Flag16 Non-stellar GSC image ("unknown" class) --- Flag17 Component of TIC pair (sep < 20") --- Flag18 Close pair with one single entry (sep < 3") --- Flag19 Component of INCA pair (sep < 10") --- Flag20 INCA/CDA star (cross-id. in Annex file) --- Flag21 Known proper-motion --- Flag22 Known high proper-motion (>0.15"/yr) --- Flag23 Known parallax --- Flag24 Known variable --- Flag25 Known multiple system --- Flag26 Hipparcos Input Catalogue star (Annex file) --- Flag27 CDA star (complementary astrometric data) --- Jean-Louis Halbwachs CDS 1995Nov04 UNKNOWN UNKNOWN * 10-Jan-1994: Original file written by Jean-Louis Halbwachs [CDS] * 04-Nov-1995: This file revisited at CDS (mainly cosmetics) I_207.xml