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I/207 Preliminary list from Tycho observations (TIC data) (Halbwachs+ 1994)
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A preliminary list of stars from Tycho observations
Halbwachs J.L., Baessgen G., Bastian U., Egret D., Hoeg E.,
van Leeuwen F., Petersen C.S., Schwekendiek P., Wicenec A.
<Astron. Astrophys. 281, L25-L28 (1994)>
=1994A&A...281L..25H
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ADC_Keywords: Positional data; Magnitudes
Description:
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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 80 1049971 The catalogue
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See also:
I/196 : Hipparcos Input Catalogue, Version 2 (Turon+, 1993)
I/197 : Tycho Input Catalogue, Revised version (Egret+ 1992)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- TICID1 GSC region number
6- 10 I5 --- TICID2 GSC running number in region
11- 20 I10 10mas RA10mas [0/129600000] Right ascension J2000.0,
Epoch=1990, in 0.01arcsec
21- 29 I9 10mas SPD10mas [0/64800000] South Polar Distance (=Dec+90)
Epoch 1990, in 0.01arcsec
31- 34 I4 10mas e_pos Error on position in 0.01arcsec
36- 38 I3 .01mag e_B ?=0 Error on B mag. in 0.01 mag. (0=unknown)
39- 43 I5 .01mag B ?=0 B magnitude in 0.01 mag. (0=unknown)
45- 47 I3 .01mag e_V ?=0 Error on V mag. in 0.01 mag. (0=unknown)
48- 52 I5 .01mag V ?=0 V magnitude in 0.01 mag. (0=unknown)
54 I1 --- Flag1 [0/1] FK5 star
55 I1 --- Flag2 [0/1] IRS star
56 I1 --- Flag3 [0/1] Photometric standard for Tycho
57 I1 --- Flag4 [0/1] Monitor star : random set
58 I1 --- Flag5 [0/1] Monitor star : selected from TIC flags
59 I1 --- Flag6 [0/1] Monitor star : NGC, ADS system
60 I1 --- Flag7 [0/1] Photometric star
61 I1 --- Flag8 [0/1] Monitor star (logical OR of #1 to #6)
62 I1 --- Flag9 [0/1] GSC/INCA discrepancy
63 I1 --- Flag10 [1] Star selected in the Recognition process
64 I1 --- Flag11 [0/1] GSC/INCA magnitude discrepancy
65 I1 --- Flag12 [0/1] INCA (or CDA) entry NOT in GSC 1.0
66 I1 --- Flag13 [0/1] Source of position (0: GSC; 1: INCA)
67 I1 --- Flag14 [0/1] -id.- for B magnitude
68 I1 --- Flag15 [0/1] -id.- for V magnitude
69 I1 --- Flag16 [0/1] Non-stellar GSC image ("unknown" class)
70 I1 --- Flag17 [0/1] Component of TIC pair (sep < 20")
71 I1 --- Flag18 [0/1] Close pair with one single entry
(sep < 3")
72 I1 --- Flag19 [0/1] Component of INCA pair (sep < 10")
73 I1 --- Flag20 [0/1] INCA/CDA star (cross-id. in Annex file)
74 I1 --- Flag21 [0/1] Known proper-motion
75 I1 --- Flag22 [0/1] Known high proper-motion (>0.15"/yr)
76 I1 --- Flag23 [0/1] Known parallax
77 I1 --- Flag24 [0/1] Known variable
78 I1 --- Flag25 [0/1] Known multiple system
79 I1 --- Flag26 [0/1] Hipparcos Input Catalogue star
(Annex file)
80 I1 --- Flag27 [0/1] CDA star (complementary astrometric
data)
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Historical Notes:
* 10-Jan-1994: Original file written by Jean-Louis Halbwachs [CDS]
* 04-Nov-1995: This file revisited at CDS (mainly cosmetics)
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(End) Jean-Louis Halbwachs [CDS] 04-Nov-1995