--------------------------------------------------------------------------------
Field 1:
HIP number
Number of the star in the HIPPARCOS Catalogue (ESA 1997).
This numbering follows closely ordering by right ascension alpha for the epoch J1991.25 (not J2000.0 !).
Field 2:
FK6 number
The FK6 number of the star (Wielen et al. 1999d, 2000a) is identical with its FK5 number (for the FK5 stars)
or its FK4Sup number (for the RSup stars).
Field 3:
Sub. = Flag for the subsample of FK6 stars
BA = basic FK5 star (Fricke et al. 1988)
BX = star from the bright extension of the FK5 (Fricke et al. 1991)
FX = star from the faint extension of the FK5 (Fricke et al. 1991)
RS = star from the RSup (Schwan et al. 1993).
Field 4:
GC number
Number of the star in the GC (Boss et al. 1937).
Field 5:
Tycho number
Identification of the star in the Tycho-2 Catalogue (Hoeg et al. 2000).
Field 6:
Selected catalogue
The astrometric solution given in the ARIHIP has been taken from the catalogue given in this field:
F61 = Part I of the FK6 (Wielen et al. 1999d)
F63 = Part III of the FK6 (Wielen et al. 2000a)
GCH = GC+HIP Catalogue (Wielen et al. 2001b)
T2H = TYC2+HIP Catalogue (Wielen et al. 2001c)
HIP = HIPPARCOS Catalogue (ESA 1997)
Field 7:
DS
Reference flag for double or multiple systems taken from HIPPARCOS Catalogue [HIP Field H10].
(Always empty in this version of ARIHIP.)
Fields 8 - 17:
Fields 8 - 17 contain the ARIHIP results in the single-star (SI) mode.
Field 8:
alpha 2000 (SI mode)
The right ascension alpha of the star at epoch and equinox J2000.0 in the ICRS/HIPPARCOS system for the SI mode
of the ARIHIP. alpha is given in the printed catalogue in the conventional sexagesimal units of hours, minutes
of time, and seconds of time. The machine-readable version of the ARIHIP gives alpha also in degrees and
decimal fractions of degrees. Below we use the notation alpha_* = alpha*cos(delta), as is done in the
HIPPARCOS Catalogue.
Field 9:
delta 2000 (SI mode)
The declination delta of the star at epoch and equinox J2000.0 in the ICRS/HIPPARCOS system for the SI mode of
the ARIHIP. delta is given in the printed catalogue in the conventional sexagesimal units of degrees, minutes
of arc, and seconds of arc. The machine-readable version of the ARIHIP gives delta also in degrees and decimal
fractions of degrees.
Field 10:
mu_alpha_* 2000 (SI mode)
The proper-motion component mu_alpha_* of the star in alpha_* at epoch and equinox J2000.0 in the ICRS/HIPPARCOS
system for the SI mode of the ARIHIP. Instead of the conventional way of presenting mu_alpha the catalogue gives
mu_alpha_* = mu_alpha*cos(delta) in milliarcseconds (mas)/year.
Field 11:
mu_delta 2000 (SI mode)
The proper-motion component mu_delta of the star in delta at epoch and equinox J2000.0 in the ICRS/HIPPARCOS
system for the SI mode of the ARIHIP.
Unit: mas/year.
Field 12:
T_alpha (SI mode)
Central epoch T_alpha in alpha of the star in the SI mode. The catalogue gives T_alpha - 1900 in order to save
printing space. Unit: years.
Field 13:
epsilon_alpha (SI mode)
Mean error epsilon_alpha of alpha_* of the star at the central epoch T_alpha (given in Field 12) in the SI mode. Unit: mas.
Field 14:
epsilon_mu_alpha_* (SI mode)
Mean error epsilon_mu_alpha_* of mu_alpha_* of the star in the SI mode. Unit: mas/year.
Field 15:
T_delta (SI mode)
Central epoch T_delta in delta of the star in the SI mode. The catalogue gives T_delta - 1900 in order to save
printing space. Unit: years.
Field 16:
epsilon_delta (SI mode)
Mean error epsilon_delta of delta of the star at the central epoch T_delta (given in Field 15) in the SI mode.
Unit: mas.
Field 17:
epsilon_mu_delta (SI mode)
Mean error epsilon_mu_delta of mu_delta of the star in the SI mode. Unit: mas/year.
Field 18:
p
Parallax p of the star (see Section 9), used in deriving the data of the star in the catalogue selected for the
ARIHIP. This is either the HIPPARCOS parallax or a photometric/spectroscopic parallax. Unit: mas.
Field 19:
epsilon_p
Mean error epsilon_p of parallax p. Unit: mas.
Field 20:
K_p
Flag for the source of p :
H = HIPPARCOS Catalogue (ESA 1997)
P = photometric/spectroscopic parallax
Field 21:
v_rad
Radial velocity v_rad of the star, used in calculating the foreshortening effect. Unit: km/s.
Field 22:
m_V
Apparent visual magnitude m_V of the star, taken from the HIPPARCOS Catalogue.
Field 23:
K_m
Flag for the variability of the brightness of the star, taken from the HIPPARCOS Catalogue (HIP Field H6):
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
Field 24:
K_bin
Flag for the double-star nature of the object: K_bin = d_1,d_2 = 10*d_1 + d_2
First digit d_1 :
The first digit d_1 describes the information on the double-star nature 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).
1 = all values of F (F_{FH}, F_{0H}, F_{0(GC)H}, F_{0F}, F_{TH}) are below 2.49
2 = at least one value of F (F_{FH}, F_{0H}, F_{0(GC)H}, F_{0F}, F_{TH}) is larger than 3.44
3 = all other (intermediate) cases
9 = no F value available
Second digit d_2 :
The second digit d_2 describes the information on the double-star nature based on various other methods. If
the data indicate various kinds of binarity, the 'astrometrically most disturbing' effect is given.
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 HIP)
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 HIP)
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
Field 25:
K_Delta_mu
Flag for the double-star nature of the object based on differences between various proper motions (Wielen et al. 1999a):
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
Field 26:
K_ae
Flag for 'astrometrically excellent stars' (see Section 5):
3 = astrometrically excellent star with rank ***
2 = astrometrically excellent star with rank **
1 = astrometrically excellent star with rank *
blank = star not classified as astrometrically excellent
Fields 27 - 76:
General remarks:
In order to save printing space, we give for the other modes of the ARIHIP, i.e. the long-term prediction (LTP)
and the short-term prediction (STP) and for HIP (HIPPARCOS Catalogue), not the full quantities, but only
their differences, Delta = other mode - SI mode, with respect to the single-star (SI) mode of the ARIHIP. These
differences have to be added to the results of the SI mode of the ARIHIP (Fields 8 and 9) in order to obtain
the results of the other modes. Since the quantities for the SI mode and all the differences Delta refer to the
epoch and equinox J2000.0 in the ICRS/HIPPARCOS system, this is then also the case for the full results of the
other modes.
The differences Delta are given for numerical and printing convenience only. Therefore, the mean errors given
in the ARIHIP Catalogue are not the errors of these differences, but those of the full quantities in the other
modes.
Fields 27 - 30:
Delta_alpha_* (LTP, STP, HIP, CAT1)
Difference Delta_alpha_* between alpha_* in the other solutions (LTP, STP, in HIP, or in the Catalogue,
that was combined with HIPPARCOS [=CAT1])
and alpha_* in the SI mode at epoch and equinox J2000.0. Units: mas.
Fields 31 - 34:
Delta_delta (LTP, STP, HIP, CAT1)
Difference Delta_delta between delta in the other solutions (LTP, STP, in HIP, or in the Catalogue,
that was combined with HIPPARCOS [=CAT1])
and delta in the SI mode at epoch and equinox J2000.0. Units: mas.
Fields 35 - 39:
Delta_mu_alpha_* (LTP, STP, HIP, CAT1, mu_0)
Difference Delta_mu_alpha_* between mu_alpha_* in the other solutions (LTP, STP), in HIP,
or in the Catalogue, that was combined with HIPPARCOS [=CAT1], and mu_0)
and mu_alpha_* in the SI mode at epoch and equinox J2000.0. Units: mas/year.
Fields 40 - 44:
Delta_mu_delta (LTP, STP, HIP, CAT1, mu_0)
Difference Delta_mu_delta between mu_delta in the other solutions (LTP, STP), in HIP,
or in the Catalogue, that was combined with HIPPARCOS [=CAT1], and mu_0)
and mu_delta in the SI mode at epoch and equinox J2000.0. Units: mas/year.
Fields 45 - 48:
T_alpha (LTP, STP, HIP, CAT1)
Central epoch T_alpha in alpha of the star in the other solutions (LTP, STP, HIP, CAT1). Units: years.
Fields 49 - 52:
epsilon_alpha_* (LTP, STP, HIP, CAT1)
Mean error epsilon_alpha_* of alpha_* of the star in the solutions LTP, STP, HIP, and in CAT1. Units: mas.
Fields 53 - 57:
epsilon_mu_alpha_* (LTP, STP, HIP, CAT1, mu_0)
Mean error epsilon_mu_alpha_* of mu_alpha_* of the star in the solutions LTP, STP, HIP, CAT1, and of mu_0.
Units: mas/year.
Fields 58 - 61:
T_delta (LTP, STP, HIP, CAT1)
Central epoch T_delta in delta of the star in the other solutions (LTP, STP, HIP, CAT1). Units: years.
Fields 62 - 65:
epsilon_delta (LTP, STP, HIP, CAT1)
Mean error epsilon_delta of delta of the star in the solutions LTP, STP, HIP, and in CAT1. Units: mas.
Fields 66 - 70:
epsilon_mu_delta (LTP, STP, HIP, CAT1, mu_0)
Mean error epsilon_mu_delta of mu_delta of the star in the solutions LTP, STP, HIP, CAT1, and of mu_0.
Units: mas/year.
Fields 71 - 73:
p (SI, STP, HIP)
Parallax p of the star in the solutions SI, STP, and in HIP. Units: mas.
Fields 74 - 76:
epsilon_p (SI, STP, HIP)
Mean error epsilon_p of parallax p of the star in the solutions SI, STP, and in HIP. Units: mas.
Field 77:
Delta_alpha_*_sys
Systematical difference Delta_alpha_*_sys in alpha_* between CAT1 and HIP. Unit: mas.
Field 78:
Delta_delta_sys
Systematical difference Delta_delta_sys in delta between CAT1 and HIP. Unit: mas.
Field 79:
Delta_mu_alpha_*_sys
Systematical difference Delta_mu_alpha_*_sys in mu_alpha_* between CAT1 and HIP. Unit: mas/year.
Field 80:
Delta_mu_delta_sys
Systematical difference Delta_mu_delta_sys in mu_delta between CAT1 and HIP. Unit: mas/year.
Field 81:
Epsilon_alpha_*_sys
Error epsilon_alpha_*_sys of Delta_alpha_*_sys in alpha_* between CAT1 and HIP. Unit: mas.
Field 82:
Epsilon_delta_sys
Error epsilon_delta_sys of Delta_delta_sys in delta between CAT1 and HIP. Unit: mas.
Field 83:
Epsilon_mu_alpha_*_sys
Error epsilon_mu_alpha_*_sys of Delta_mu_alpha_*_sys in alpha_* between CAT1 and HIP. Unit: mas/year.
Field 84:
Epsilon_mu_delta_sys
Error epsilon_mu_delta_sys of Delta_mu_delta_sys in delta between CAT1 and HIP. Unit: mas/year.
Field 85:
K_sys_pos
Flag indicating that the star was used in the comparison of positions in CAT1 and HIP.
Field 86:
K_sys_pos
Flag indicating that the star was used in the comparison of proper motions in CAT1 and HIP.
Field 87:
F_{FH}
F parameter based on the difference Delta_mu_{FH} = mu_F - mu_H between
the proper motions given by the FK5 (or RSup) and by HIPPARCOS.
Field 88:
F_{0H}
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 CAT1
and the HIPPARCOS Catalogue) and the proper motion mu_H given by HIPPARCOS.
Field 89:
F_{0(GC)H}
F parameter based on the difference Delta_mu_{0(GC)H} = mu_{0(GC)} - mu_H between
the proper motion mu_{0 (GC)} (based on the stellar positions in the GC (Boss et al. 1937) and
in the HIPPARCOS Catalogue) and the proper motion mu_H given by HIPPARCOS.
Field 90:
F_{0F}
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 (or RSup) and in the HIPPARCOS Catalogue) and the proper motion mu_F given by the FK5 (or RSup).
Field 91:
F_{TH}
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) and the proper motion mu_H given by HIPPARCOS.
Field 92:
Number of note
The number of the individual note refers to the notes given either in Part I of
the FK6 (Numbers 1-560, Wielen et al. 1999d) or in Part III of the FK6 (Numbers 3001-3024, Wielen et al. 2000).
Field 93:
Tabular Notes
Notes on information concerning the possible binary nature of the star in tabular form.
Details on the individual columns can be found here.
Field 94:
HIP sol
Flag indicating a non standard solution in HIPPARCOS Catalogue for double and multiple
systems [HIP Field H59]. (Always empty in this version of ARIHIP.)
Field 95:
Type of Combination
Flag indicating the type of solution in ARIHIP for double and multiple systems.
(Always empty in this version of ARIHIP.)
Fields 96 - 230:
Fields 96 - 230 contain errors and correlation coefficients for the ARIHIP results in the SI mode, LTP mode,
and STP mode for all three epochs: First for the individual central epochs, for the HIPPARCOS epoch of J1991.25,
and for J2000. Each set of data is arranged as in the HIPPARCOS Catalogue: Five values showing the standard
errors (in alpha*, delta, parallax, mu_alpha*, and mu_delta), followed by ten correlation coefficients
(delta/alpha*, parallax/alpha*, parallax/delta, mu_alpha*/alpha*, mu_alpha*/delta, mu_alpha*/parallax,
mu_delta/alpha*, mu_delta/delta, mu_delta/parallax, mu_delta/mu_alpha*).
Fields 96 - 110:
Standard errors and correlation coefficients for the individual central epochs in the SI mode.
Fields 111 - 125:
Standard errors and correlation coefficients for the individual central epochs in the LTP mode.
Fields 126 - 140:
Standard errors and correlation coefficients for the individual central epochs in the STP mode.
Fields 141 - 155:
Standard errors and correlation coefficients for J1991.25 in the SI mode.
Fields 156 - 170:
Standard errors and correlation coefficients for J1991.25 in the LTP mode.
Fields 171 - 185:
Standard errors and correlation coefficients for J1991.25 in the STP mode.
Fields 186 - 200:
Standard errors and correlation coefficients for J2000 in the SI mode.
Fields 201 - 215:
Standard errors and correlation coefficients for J2000 in the LTP mode.
Fields 216 - 230:
Standard errors and correlation coefficients for J2000 in the STP mode.
Field 231:
Catalog Membership
Field 231 contains flags indicating the inclusion of the star in the catalogs considered here:
The FK5 and FK6, the GC and GC+HIP, the TYCHO2 and TYC2+HIP, and finally in the ARIHIP.
0: star is not a member of the catalog
1: star is a member of the catalog
In the case of FK5 stars:
1, 2, 3, or 4 in column 'FK5' indicates membership in basic FK5, bright extension, faint extension, or
in the catalogue of supplementary stars.
1 or 3 in column 'FK6' indicates membership in FK6 parts I or III.
Updated: September 2002