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I/264 Sixth Catalogue of Fundamental Stars (FK6) (Wielen+ 2000)
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Sixth Catalogue of Fundamental Stars (FK6).
Part I: Basic Fundamental Stars with Direct Solutions
Sixth Catalogue of Fundamental Stars (FK6) , Parts I and III
Wielen R., Schwan H., Dettbarn C., Lenhardt H., Jahreiss H., Jahrling R.
<Veroeff. Astron. Rechen-Inst. Heidelberg 35, 1 (1999)>
=1999VeARI..35....1W
Part III: Additional Fundamental Stars with Direct Solutions
Wielen R., Schwan H., Dettbarn C., Lenhardt H., Jahreiss H., Jahrling R.
Khalisi E.
<Veroeff. Astron. Rechen-Inst. Heidelberg 37, 1 (2000)>
=2000VeARI..37....1W
================================================================================
ADC_Keywords: Positional data ; Proper motions ; Stars, fundamental
Description:
The FK6 is a suitable combination of the results of the HIPPARCOS
(Cat. <I/239>) astrometry satellite with ground-based data, measured
over more than two centuries.
The FK6 gives other solutions than the classical `single-star mode'
(SI mode), which take into account the fact that hidden astrometric
binaries among `apparently single-stars' introduce sizable `cosmic
errors' into the quasi-instantaneously measured HIPPARCOS proper
motions and positions. The FK6 gives in addition to the SI mode the
`long-term prediction (LTP) mode' and the `short-term prediction (STP)
mode'. These LTP and STP modes are on average the most precise
solutions for apparently single stars, depending on the epoch
difference with respect to the HIPPARCOS epoch of about 1991.
The FK6(I) results from the combination of FK5(I) (Cat. <I/149>) with
Hipparcos results. Among its 878 stars, it contains 340 objects
classified as `astrometrically excellent stars', most suited for
high-precision astrometry. The typical mean error of an FK6(I) proper
motion is 0.35 mas/year in the single-star mode (about two times
better than Hipparcos), and 0.50 mas/year in the long-term prediction
mode (about four times better than Hipparcos).
The FK6(III) results from the combination of stars from FK5 extension
(Cat. <I/175>) with Hipparcos. Among its 3272 stars, it contains 1928
objects classified as `astrometrically excellent stars'. The typical
mean error of an FK6(III) proper motion is 0.59 mas/year in the
single-star mode, and 0.93 mas/year in the long-term prediction mode.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fk6_1.dat 842 878 FK6(I) File version 01
fk6_3.dat 483 3272 FK6(III) File version 01
notes1.dat 80 1310 Individual notes to FK6(I) stars
tabnote3.dat 56 1144 `Tabular Notes' about Binarity in FK6(III)
notes3.dat 80 56 Individual notes to FK6(III) stars
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See also:
http://www.ari.uni-heidelberg.de/fk6/ : The FK6 home page
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/149 : Fifth Fundamental Catalogue (FK5) Part I (Fricke+, 1988)
I/175 : Fifth Fundamental Catalogue (FK5) - Extension (Fricke+ 1991)
Byte-by-byte Description of file: fk6_1.dat
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Bytes Format Units Label Explanations
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2- 6 I5 --- FK6 FK6 number of the star
(identical with its FK5 number)
10- 15 I6 --- HIP Hipparcos (<I/239>) number of the star
19- 37 A19 --- Name Name of the star
40- 41 I2 h RAh Right ascension (ICRS, Ep=J2000) (G1)
43- 44 I2 min RAm Right ascension (ICRS, Ep=J2000) (G1)
46- 54 F9.6 s RAs Right ascension (ICRS, Ep=J2000) (G1)
59 A1 --- DE- Declination sign (ICRS, Ep=J2000) (G1)
60- 61 I2 deg DEd Declination (ICRS, Ep=J2000) (G1)
63- 64 I2 arcmin DEm Declination (ICRS, Ep=J2000) (G1)
66- 73 F8.5 arcsec DEs Declination (ICRS, Ep=J2000) (G1)
77- 85 F9.2 mas/yr pmRA* Proper motion in right ascension (SI mode)
(pmRA* = mu_alpha*cos(delta)) (G1)
89- 97 F9.2 mas/yr pmDE Proper motion in declination (G1)
100-106 F7.2 yr TRA Central epoch in RA of the star (SI mode)
111-115 F5.2 mas e_RA* rms uncertainty on alpha*cos(delta) at
the central epoch TRA (SI mode)
120-124 F5.2 mas/yr e_pmRA* rms uncertainty on pmRA* (SI mode)
127-133 F7.2 yr TDE Central epoch in DE of the star (SI mode)
138-142 F5.2 mas e_DEs rms uncertainty on DE at the central
epoch TDE (SI mode)
147-151 F5.2 mas/yr e_pmDE rms uncertainty on pm DE (SI mode)
155-160 F6.2 mas plx Resulting parallax of the star (G3)
165-169 F5.2 mas e_plx rms uncertainty on plx
174 A1 --- f_plx [HPC] Parallax origin, H=Hipparcos (G4)
179-184 F6.1 km/s RV Radial velocity, used in calculating the
foreshortening effect
189-193 F5.2 mag Vmag Apparent visual magnitude of the star
(taken from the HIPPARCOS Catalogue)
198 I1 --- f_Vmag [1/3]? Variability flag, from Hipparcos (G5)
204-205 I2 --- Kbin1 Double-star nature of the object flag (G6)
211 I1 --- Kbin2 ? Double-star nature from pm differences (G7)
217 I1 --- Kae ? Astrometrically excellent star flag (G8)
222-229 F8.2 mas DRA*LTP Difference in alpha*cos(delta) between
long-term prediction (LTP) and SI modes
233-240 F8.2 mas DRA*STP Difference in alpha*cos(delta) between
short-term prediction (STP) and SI modes
244-251 F8.2 mas DRA*HIP Difference in alpha*cos(delta) between
HIP and SI modes
255-262 F8.2 mas DRA*FK5 Difference in alpha*cos(delta) between
FK5 and SI modes
266-273 F8.2 mas DDE:LTP Difference in declination between
long-term prediction (LTP) and SI modes
277-284 F8.2 mas DDE:STP Difference in declination between
short-term prediction (STP) and SI modes
288-295 F8.2 mas DDE:HIP Difference in declination between
HIP and SI modes
299-306 F8.2 mas DDE:FK5 Difference in declination between
FK5 and SI modes
310-317 F8.2 mas/yr DpmRA*LTP Difference in proper motion in RA between
long-term prediction (LTP) and SI modes
321-328 F8.2 mas/yr DpmRA*STP Difference in proper motion in RA between
short-term prediction (STP) and SI modes
332-339 F8.2 mas/yr DpmRA*HIP Difference in proper motion in RA between
HIP and SI modes
343-350 F8.2 mas/yr DpmRA*FK5 Difference in proper motion in RA between
FK5 and SI modes
354-361 F8.2 mas/yr DpmRA*mu0 Difference in proper motion in RA between
mu0 (HIP-FK5) and SI modes
365-372 F8.2 mas/yr DpmDE:LTP Difference in proper motion in DE between
long-term prediction (LTP) and SI modes
376-383 F8.2 mas/yr DpmDE:STP Difference in proper motion in DE between
short-term prediction (STP) and SI modes
387-394 F8.2 mas/yr DpmDE:HIP Difference in proper motion in DE between
HIP and SI modes
398-405 F8.2 mas/yr DpmDE:FK5 Difference in proper motion in DE between
FK5 and SI modes
409-416 F8.2 mas/yr DpmDE:mu0 Difference in proper motion in DE between
mu0 and SI modes
419-425 F7.2 yr TRALTP RA central epoch in LTP solution
428-434 F7.2 yr TRASTP RA central epoch in STP solution
437-443 F7.2 yr TRAHIP RA central epoch in HIP solution
446-452 F7.2 yr TRAFK5 RA central epoch in FK5 solution
457-461 F5.2 mas e_RA*LTP rms uncertainty on RA at central epoch TRA
in long-term prediction (LTP) solution
466-470 F5.2 mas e_RA*STP rms uncertainty on RA at central epoch TRA
in short-term prediction (STP) solution
475-479 F5.2 mas e_RA*HIP rms uncertainty on RA at central epoch TRA
in HIP solution
484-488 F5.2 mas e_RA*FK5 rms uncertainty on RA at central epoch TRA
in FK5 solution
493-497 F5.2 mas/yr e_pmRA*LTP rms uncertainty on pmRA* in LTP solution
502-506 F5.2 mas/yr e_pmRA*STP rms uncertainty on pmRA* in STP solution
511-515 F5.2 mas/yr e_pmRA*HIP rms uncertainty on pmRA* in HIP solution
520-524 F5.2 mas/yr e_pmRA*FK5 rms uncertainty on pmRA* in FK5 solution
529-533 F5.2 mas/yr e_pmRA*mu0 rms uncertainty on pmRA* in mu0 solution
536-542 F7.2 yr TDELTP DE central epoch in LTP solution
545-551 F7.2 yr TDESTP DE central epoch in LTP solution
554-560 F7.2 yr TDEHIP DE central epoch in HIP solution
563-569 F7.2 yr TDEFK5 DE central epoch in FK5 solution
574-578 F5.2 mas e_DE:LTP rms uncertainty on DE at central epoch TDE
in long-term prediction (LTP) solution
583-587 F5.2 mas e_DE:STP rms uncertainty on DE at central epoch TDE
in Short-term prediction (STP) solution
592-596 F5.2 mas e_DE:HIP rms uncertainty on DE at central epoch TDE
in HIP solution
601-605 F5.2 mas e_DE:FK5 rms uncertainty on DE at central epoch TDE
in FK5 solution
610-614 F5.2 mas/yr e_pmDE:LTP rms uncertainty on pmDE in LTP solution
619-623 F5.2 mas/yr e_pmDE:STP rms uncertainty on pmDE in STP solution
628-632 F5.2 mas/yr e_pmDE:HIP rms uncertainty on pmDE in HIP solution
637-641 F5.2 mas/yr e_pmDE:FK5 rms uncertainty on pmDE in FK5 solution
646-650 F5.2 mas/yr e_pmDE:mu0 rms uncertainty on pmDE in mu0 solution
654-659 F6.2 mas plxSI Parallax derived in the SI mode
663-668 F6.2 mas plxSTP Parallax derived in the STP mode
672-677 F6.2 mas plxHIP Parallax from HIP
683-686 F4.2 mas e_plxSI rms uncertainty on plxSI
692-695 F4.2 mas e_plxSTP rms uncertainty on plxSTP
701-704 F4.2 mas e_plxHIP rms uncertainty on plxHIP
708-715 F8.2 mas DRAsys FK5-HIP difference in alpha*cos(delta) (9)
719-726 F8.2 mas DDEsys FK5-HIP difference in declination (9)
727 A1 --- --- [.] (the dot exists in 12 records)
730-737 F8.2 mas/yr DpmRA*sys FK5-HIP difference in pm_RA*cos(DE) (9)
741-748 F8.2 mas/yr DpmDE:sys FK5-HIP difference in pmDE (9)
755-759 F5.2 mas e_RA*sys rms uncertainty on RA*sys
766-770 F5.2 mas e_DE:sys rms uncertainty on DE:sys
778-781 F4.2 mas/yr e_pmRA*sys rms uncertainty on pmRA*sys
789-792 F4.2 mas/yr e_pmDE:sys rms uncertainty on pmDE:sys
797 I1 --- Ksys ? FK5/HIP systematic differences flag (10)
803-807 F5.2 --- FFH F parameter based on FK5/HIP data (G11)
812-816 F5.2 --- F0H F parameter based on FK5/HIP data (G11)
821-825 F5.2 --- F0(GC)H ? F parameter based on GC/HIP data (G11)
830-834 F5.2 --- F0F F parameter based on Fk5/HIP data (G11)
838-840 I3 --- Note ? Number of the note in notes1.dat file
842 A1 --- --- [|]
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Note (9): Systematic differences between the FK5 system and ICRS/HIPPARCOS
system (in the sense FK5-HIP), for the star under consideration at
the epoch J1949.4 .
The differences have to be subtracted from the FK5 data at epoch
J1949.4 in order to obtain the FK5 quantities at epoch J1949.4 in the
HIPPARCOS reference system. The systematic differences given include
both the rotational and regional systematic differences between the
FK5 system and the HIPPARCOS system. The mean errors of the systematic
differences at epoch J1949.4 are given.
Note (10): Flag for the use of the star in determining the systematic
differences between the FK5 system and the HIPPARCOS system in
position and proper motion:
1 = used for positions and proper motions
blank = not used
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Byte-by-byte Description of file: fk6_3.dat
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Bytes Format Units Label Explanations
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2- 6 I5 --- FK6 FK6 number of the star
(identical with its FK5 number)
10- 15 I6 --- HIP Hipparcos (<I/239>) number of the star
19- 20 A2 --- Flag Flag for the subsample of FK6(III) stars (1)
24- 42 A19 --- Name Name of the star
45- 46 I2 h RAh Right ascension (ICRS, Ep=J2000) (G1)
48- 49 I2 min RAm Right ascension (ICRS, Ep=J2000) (G1)
51- 59 F9.6 s RAs Right ascension (ICRS, Ep=J2000) (G1)
64 A1 --- DE- Declination sign (ICRS, Ep=J2000) (G1)
65- 66 I2 deg DEd Declination (ICRS, Ep=J2000) (G1)
68- 69 I2 arcmin DEm Declination (ICRS, Ep=J2000) (G1)
71- 78 F8.5 arcsec DEs Declination (ICRS, Ep=J2000) (G1)
82- 90 F9.2 mas/yr pmRA* Proper motion in right ascension
(pmRA* = mu_alpha*cos(delta)) (G1)
94-102 F9.2 mas/yr pmDE Proper motion in declination (G1)
105-111 F7.2 yr TRA Central epoch in RA of the star (SI mode)
117-120 F4.2 mas e_RA* rms uncertainty on alpha*cos(delta) at
the central epoch TRA (SI mode)
126-129 F4.2 mas/yr e_pmRA* rms uncertainty on pmRA* (SI mode)
132-138 F7.2 yr TDE Central epoch in DE of the star (SI mode)
144-147 F4.2 mas e_DEs rms uncertainty on DE at the central
epoch TDE (SI mode)
153-156 F4.2 mas/yr e_pmDE rms uncertainty on pmDE (SI mode)
161-165 F5.1 mas plx Resulting parallax of the star (G3)
171-174 F4.2 mas e_plx rms uncertainty on plx
179 A1 --- f_plx [HP] Parallax origin, H=Hipparcos (G4)
184-191 F8.1 km/s RV ? Radial velocity, used in calculating the
foreshortening effect
196-199 F4.2 mag Vmag Apparent visual magnitude of the star
(taken from the HIPPARCOS Catalogue)
205 I1 --- f_Vmag [1/3]? Variability flag, from Hipparcos (G5)
211-212 I2 --- Kbin1 Double-star nature of the object flag (G6)
218 I1 --- Kbin2 ? Double-star nature from pm differences (G7)
224 I1 --- Kae ? Astrometrically excellent star flag (G8)
229-236 F8.2 mas/yr DpmRA*LTP Difference in proper motion in RA between
long-term prediction (LTP) and SI mode
240-247 F8.2 mas/yr DpmRA*STP Difference in proper motion in RA between
short-term prediction (STP) and SI mode
251-258 F8.2 mas/yr DpmRA*HIP Difference in proper motion in RA between
HIP and SI mode
262-269 F8.2 mas/yr DpmRA*FK5 Difference in proper motion in RA between
FK5 and SI mode
273-280 F8.2 mas/yr DpmRA*mu0 Difference in proper motion in RA between
mu0 and SI mode
284-291 F8.2 mas/yr DpmDE:LTP Difference in proper motion in DE between
long-term prediction (LTP) and SI mode
295-302 F8.2 mas/yr DpmDE:STP Difference in proper motion in DE between
short-term prediction (STP) and SI mode
306-313 F8.2 mas/yr DpmDE:HIP Difference in proper motion in DE between
HIP and SI mode
317-324 F8.2 mas/yr DpmDE:FK5 Difference in proper motion in DE between
FK5 and SI mode
328-335 F8.2 mas/yr DpmDE:mu0 Difference in proper motion in DE between
mu0 and SI mode
339-343 F5.2 mas/yr e_DpmRA*LTP rms uncertainty on DpmRA*LTP
348-352 F5.2 mas/yr e_DpmRA*STP rms uncertainty on DpmRA*STP
357-361 F5.2 mas/yr e_DpmRA*HIP rms uncertainty on DpmRA*HIP
366-370 F5.2 mas/yr e_DpmRA*FK5 rms uncertainty on DpmRA*FK5
375-379 F5.2 mas/yr e_DpmRA*mu0 rms uncertainty on DpmRA*mu0
384-388 F5.2 mas/yr e_DpmDE:LTP rms uncertainty on DpmDELTP
393-397 F5.2 mas/yr e_DpmDE:STP rms uncertainty on DpmDESTP
402-406 F5.2 mas/yr e_DpmDE:HIP rms uncertainty on DpmDEHIP
411-415 F5.2 mas/yr e_DpmDE:FK5 rms uncertainty on DpmDEFK5
420-424 F5.2 mas/yr e_DpmDE:mu0 rms uncertainty on DpmDEmu0
429-433 F5.2 --- FFH F parameter based on FK5/HIP data (G11)
438-442 F5.2 --- F0H F parameter based on FK5/HIP data (G11)
447-451 F5.2 --- F0(GC)H ? F parameter based on GC/HIP data (G11)
457-460 F4.2 --- F0F F parameter based on Fk5/HIP data (G11)
465-469 F5.2 --- FTH ? F parameter based on TYCHO2/HIP (12)
475 A1 --- tNote [t] indicates a note in tabnote3.dat
477-480 I4 --- Note ? Number of the note in file notes3.dat
483 A1 --- --- [|]
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Note (1): Flag for the subsample of FK6(III) stars:
BX = star from the bright extension of the FK5
FX = star from the faint extension of the FK5
RS = star from the RSup (Schwan et al., 1993, Cat. <I/210>).
Note (12): F parameter based on the difference Delta_mu_{TH} = mu_T_ - mu_H_
between the proper motion mu_T_ given in TYCHO2 Catalogue (Hoeg et al.,
2000, Cat. <I/259>) and the proper motion mu_H_ given by HIPPARCOS.
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Byte-by-byte Description of file: notes1.dat notes3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Note [1/3024]=+ Number of the note
6- 80 A75 --- Text Text of the note (1)
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Note (1): Abbreviations for flags:
optical companion because of:
af = approximately fixed
nc = no common proper motion
hv = high relative velocity
pc = large separation in pc
other flags:
no = no relative position given
oo = only one observation given in CCDM or WDS
(hence no relative proper motion available)
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Byte-by-byte Description of file: tabnote3.dat
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Bytes Format Units Label Explanations
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3- 6 I4 --- FK6 FK6 number
10- 15 I6 --- HIP HIPPARCOS (Cat. <I/239>) number
20 A1 --- H *[sdt.] HIPPARCOS indicators for suspected binarity
23 I1 % U *HIPPARCOS percentage of rejected data
24 I1 --- F *? HIPPARCOS goodness-of-fit parameter
27 A1 --- K *[bun.] Binarity from speckle observations
28 A1 --- C *[ctwr.] Existence of a companion at large distance
31 A1 --- G *[vu2bd.] Binarity from Wilson's GCRV <III/21>
32 A1 --- B *[vu2bd.] Binarity from Bright Star Cat. <V/50>
33 A1 --- S *[vu2bd.] Binarity from 'oRV' data in SIMBAD (CDS)
34 A1 --- T *[bu.] Binarity from 'MK' data in SIMBAD (CDS)
37 A1 --- A *[vu2db.] Binarity from Barbier-Brossat+ <III/184>
38 A1 --- M *[vu2dbf.] Binarity from Malaroda+ <III/216>
39 A1 --- L *[vu2dbc.] Binarity from additional radial velocities
42 A1 --- V *[abew.] Binarity from photometric variability.
43 A1 --- P *[csb.]
44 A1 --- I [i.] individual note is given in file notes3.dat
50- 53 I4 --- Note ?Individual note in notes3.dat file
56 A1 --- --- [|]
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Note on H: HIP indicators for a suspected visual binary:
s = Flag S in HIP Field H61.
d = Flag D in HIP Field H52, based on photometry.
This could be an indication of duplicity.
t = HIP Flags S and D (t = s+d).
Note on U: HIP percentage of rejected data (HIP Field H29 (F1)).
one digit only (less than 10%)
A high percentage of rejected data may be caused by a duplicity of the
object, but other reasons cannot be excluded.
Note on F: HIPPARCOS goodness-of-fit parameter (HIP Field H30, F2)
- F2 < 0
0 0 <= F2 < 1
1 1 <= F2 < 2
2 2 <= F2 < 3
3 3 <= F2 < 4
etc.
A large value of F2 (e.g. larger than 3) may be caused by a duplicity
of the object, but other reasons cannot be excluded.
Note on K: Indications on binarity from the catalogue of speckle
observations (Hartkopf et al., 1999AJ....118..509H).
b = binary resolved by speckle (or other interferometric) observations
(such objects are generally excluded from the FK6(III))
u = possibly resolved
n = object observed, but not resolved (i.e. not hint to binarity)
Note on C: Indicator for a star which has one (or more) visual
component(s) with a separation {rho} of at least 60".
Source of information:
c = CCDM (Dommanget and Nys, 1994, Cat. <I/211>)
t = TYCHO2 (Hoeg et al., 2000, Cat. <I/259>)
w = WDS (Worley and Douglass, 1997 (Cat. <I/237>), and updated versions
under the given URL)
r = other sources
Visual binaries with {rho}<60" are generally excluded from the FK6(III).
Note on G, B, S, A, M, L: Binarity from radial velocities.
v = radial velocity is variable
u = radial velocity may be variable
2 = variable radial velocities for two stellar components
b = (other) indications of binarity
d = (other) indications of binarity are doubtful
Remarks about the binarity flag:
f = probably erroneous indication on binarity.
c = radial velocity is probably constant.
Note on T: Indication of binarity from spectral classification:
b = binary
u = possibly a binary
Note on V: Indication of binarity from photometric variability
a = eclipsing binary, Algol type
b = eclipsing binary, beta Lyrae type
e = eclipsing binary, type uncertain
w = eclipsing binary, W Ursae Majoris type
Note on P: Indication for a variability of the radial velocity V_rad_
due to stellar pulsation (which may be confused with a variability of
V_rad_ due to spectroscopic binarity).
c = Cepheid
s = delta Scuti star
b = beta Cephei star
--------------------------------------------------------------------------------
Global notes:
Note (G1):
The positions and proper motions are given at epoch and equinox J2000.0
in the ICRS/HIPPARCOS system, for the single-star (SI) mode of the FK6.
Note (G3): This is either the HIPPARCOS parallax or a
photometric/spectroscopic parallax
Note (G4): Source for parallax:
H = HIPPARCOS Catalogue (ESA 1997, Cat. <I/239>)
P = Newly determined photometric/spectroscopic parallax
C = Not explicited
Note (G5): Variability of the brightness of the star:
blank = star not variable
1 = star variable at the level of < 0.06 mag
2 = star variable at the level of 0.06 - 0.6 mag
3 = star variable at the level of > 0.6 mag
Note (G6): Flag for the double-star nature of the object:
Kbin = d_1_d_2_ = 10d_1_+d_2_
First digit d1 is based on the proper-motion differences {Delta}{mu}:
The method and the meaning of the corresponding test parameters F are
explained in Wielen et al. (1999A&A...346..675W)
1 = all values of F (F_FH, F_0H, F_0(GC)H, F_0F) are below 2.49
2 = at least one value of F (F_FH, F_0H, F_0(GC)H, F_0F) is
larger than 3.44
3 = all other (intermediate) cases
Second digit d2 is based in other indicators:
if the data indicate various kinds of binarity, the
`astrometrically most disturbing' effect is given, as:
1 = single star indicated
2 = the star is a member of a visual binary (gravitationally bound
system), or the object is resolved by speckle interferometry
3 = the object is suspected to be a visual binary (mainly due to
HIPPARCOS)
4 = the star has at least one optical companion with a separation
of {rho}<60"
5 = the star has at least one optical companion, but all companions
have a separation of {rho} >= 60"
6 = astrometric binary (mainly the non-standard solutions O, G, V, X
of HIPPARCOS)
7 = spectroscopic binary with a known orbit, or the star is an
eclipsing binary
8 = the radial velocity of the star is variable (indicating a
spectroscopic binary), or the object shows a composite
spectrum (indicating a double star)
9 = the radial velocity of the star may be variable (possible
indication for a spectroscopic binary), or the object may show
a composite spectrum (possibly indicating a double star),
or other weak indications of binarity,
or the star has a (suspected) planetary companion.
Note (G7): Flag for the double-star nature of the object based on differences
between various proper motions (Wielen et al., 1999A&A...346..675W):
1 = single-star candidate
2 = {Delta}{mu} binary
blank = uncertain (between 1 and 2), or the binary nature which is
indicated by other data does not allow to classify the object
as a single-star candidate
Note (G8): Flag for 'astrometrically excellent stars':
3 = astrometrically excellent star with rank *** (the very best)
2 = astrometrically excellent star with rank **
1 = astrometrically excellent star with rank *
blank = star not classified as astrometrically excellent
Note (G11): These fields contain the test parameters F for various
proper-motion differences {Delta}{mu}. The parameter F is defined by
Eq.(23) of Wielen et al. (1999A&A...346..675W).
It is essentially the ratio between the two-dimensional difference
{Delta}{mu} and its mean error. Values of F>3.44 indicate {Delta}{mu}
binaries. If all the F values are below 2.49, the star may be
classified as a single-star candidate.
FFH: F parameter based on the difference {Delta}{mu}_FH_={mu}_F_-{mu}_H_
between the proper motions given by the FK5 and by HIPPARCOS.
F0H: F parameter based on the difference {Delta}{mu}_0H_={mu}_0_-{mu}_H_
between the proper motion {mu}_0_ (based on the stellar positions in
the FK5 and in the HIPPARCOS Catalogue) and the proper motion mu_H_
given by HIPPARCOS.
F0GCH: F parameter based on the difference
{Delta}{mu}_0(GC)H_={mu}_0(GC)_-{mu}_H_
between the proper motion {mu}_0_ (based on the stellar positions
in the GC (Boss et al., 1937, Cat. <I/113>) and in the HIPPARCOS
Catalogue) and the proper motion {mu}_H_ given by HIPPARCOS.
F0F: F parameter based on the difference {Delta}{mu}_0F_={mu}_0_-{mu}_F_
between the proper motion {mu}_0_ (based on the stellar positions
in the FK5 and in the HIPPARCOS Catalogue) and the proper motion
{mu}_F_ given by the FK5.
--------------------------------------------------------------------------------
Acknowledgements:
Christian Dettbarn <dettbarn@ari.uni-heidelberg.de>
References:
Wielen et al., 1999A&A...346..675W
Wielen et al., 1999A&A...347.1046W
Wielen et al., 2001A&A...368..298W
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(End) Francois Ochsenbein [CDS] 01-Mar-2002