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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:
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:
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)
Fields 6 - 15:
The Fields 6 - 15 contain the ARIHIP results in the single-star (SI) mode.
Field 6:
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 it is done in the HIPPARCOS Catalogue.
Field 7:
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 8:
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 9:
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. Units: mas/year.
Field 10:
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. Units: years.
Field 11:
epsilon_alpha (SI mode)
Mean error epsilon_alpha of alpha_* of the star at the
central epoch T_alpha (given in Field 10) in the SI mode. Units: mas.
Field 12:
epsilon_mu_alpha_* (SI mode)
Mean error epsilon_mu_alpha_* of mu_alpha_* of the star in
the SI mode. Units: mas/year.
Field 13:
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. Units: years.
Field 14:
epsilon_delta (SI mode)
Mean error epsilon_delta of delta of the star at the
central epoch T_delta (given in Field 13) in the SI mode. Units: mas.
Field 15:
epsilon_mu_delta (SI mode)
Mean error epsilon_mu_delta of mu_delta of the star inthe SI mode. Units: mas/year.
Field 16:
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.
Units: mas.
Field 17:
epsilon_p
Mean error epsilon_p of p. Units: mas.
Field 18:
K_p
Flag for the source of p :
H = HIPPARCOS Catalogue (ESA 1997)
P = photometric/spectroscopic parallax
Field 19:
v_rad
Radial velocity v_rad of the star, used in calculating
the foreshortening effect. Units: km/s.
Field 20:
m_V
Apparent visual magnitude m_V of the star, taken from the HIPPARCOS
Catalogue.
Field 21:
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 22:
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 23:
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 24:
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 25 - 30:
General remarks:
The printed version and this print-analogue of the ARIHIP
contain for the other modes of the ARIHIP the proper motions and their mean
errors only. The positions, central epochs, and parallaxes derived for these
modes are given in the extended version of the ARIHIP.
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 25 - 27:
Delta_mu_alpha_* (LTP, STP, HIP)
Difference Delta_mu_alpha_* between mu_alpha_* in the other solutions (LTP, STP, HIP)
and mu_alpha_* in the SI mode at epoch and equinox J2000.0. Units: mas/year.
Fields 28 - 30:
Delta_mu_delta (LTP, STP, HIP)
Difference Delta_mu_delta between mu_delta in the other solutions (LTP, STP, HIP)
and mu_delta in the SI mode at epoch and equinox J2000.0. Units: mas/year.
Fields 31 - 33:
epsilon_mu_alpha_* (LTP, STP, HIP)
Mean error epsilon_mu_alpha_* of mu_alpha_* of the star in the solutions LTP, STP, HIP. Units: mas/year.
Fields 34 - 36:
epsilon_mu_delta (LTP, STP, HIP)
Mean error epsilon_mu_delta of mu_delta of the star in the solutions LTP, STP, HIP. Units: mas/year.
Field 37:
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 38:
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 the FK5 (or RSup)
and in the HIPPARCOS Catalogue) and the proper motion mu_H given by HIPPARCOS.
Field 39:
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 40:
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 41:
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 42:
Number of an individual 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).
Updated: 08 April 2002