I/210 Mean Positions and proper motions of 995 FK4Sup stars (Schwan+ 1993)
Improved mean positions and proper motions for the 995 FK4Sup stars
not included in the FK5 Extension
Schwan H., Bastian U., Bien R., Jaehrling R., Jahreiss H., Roeser S
<Veroeff. Astron. Rechen-Inst. Heidelberg, 34 (1993)>
=1993VeARI..34....1S 1993VeARI..34....1S
ADC_Keywords: Positional data ; Proper motions ; Stars, fundamental
Description:
This catalogue lists improved mean positions and proper motions for
the 995 stars in the FK4 Supplement (Veroeff. Astron. Rechen-Inst.
Heidelberg No 11, 1963) which were not included in the Fifth
Fundamental Catalogue (Part I: "The Basic FK5", Fricke et al., 1988,
Veroeff. Astron. Rechen-Inst. Heidelberg No 32, Catalogue I/149/; Part
II: "The FK5 Extension", Fricke et al., 1991, Veroeff. Astron.
Rechen-Inst. Heidelberg No 33, Catalogue I/175/). The main purpose of
the FK4 Supplement was to stimulate further observations within
absolute and differential programs of the stars listed in that
catalogue with the aim of their inclusion as new fundamental stars
into a future fundamental catalogue. The new fundamental stars should
increase the star density without extending the magnitude limit to
fainter magnitudes. Since the publication of the "Supplement-Katalog
des FK3" (published in Astron-Geodaet. Jahrbuch 1954 and
Astron-Geodaet. Jahrbuch 1956) these stars were included in many
observing programs.
Within work on deriving the FK5 Extension all stars in the FK4
Supplement had been treated in exactly the same way and improved mean
positions and proper motions had thus been obtained for all FK4 Sup
stars. For more details reference is made to the introduction of the
FK5 Extension. FK4 Sup stars with the best astrometric data were
included in the FK5 Extension for achieving a homogeneous distribution
in magnitude and taking simultaneously into account an even
distribution on the sky. This selection process included 992 of the
1987 FK4 Sup stars into the FK5 Extension.
Although the astrometric precision of the stars given in the present
catalogue is inferior to that of the FK4 Supplement stars included in
the FK5 Extension, they deserve being published because a considerable
number of observations has been obtained for these stars since about
1955, stimulated by the publication of the FK3 Supplement. The average
mean epoch of observation of the stars given is therefore shifted to
comparatively modern epochs (see the table in Section 2 of the
publication). The astrometric precision of the stars presented here is
better than for most other published star positions and proper
motions, and the positions and proper motions are the best which could
be derived from the available observations. These observations are
published in the same catalogues as listed in the FK5, Part II on
pages 139 ff. The apparent visual magnitudes are between 3.6 and 7.7
with a concentration around the mean value of 5.94. They are thus
within the magnitude limit of the Basic FK5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 203 995 The catalogue
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See also:
I/143 : Fourth Fundamental Catalogue and Supplement (FK4) (Fricke+ 1963)
I/149 : Fifth Fundamental Catalogue, part I FK5(I) (Fricke+, 1988)
I/175 : Fifth Fundamental Catalogue, part III FK5(III) (Fricke+, 1988)
I/161 : AGK3R (Smith, 1990)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- FK4 Designation
7- 8 I2 h RAh Right Ascension Epoch=J2000 Equinox=J2000
(hours)
10- 11 I2 min RAm Right Ascension J2000 (minutes)
13- 18 F6.3 s RAs Right Ascension J2000 (seconds)
21- 27 F7.3 10ms/yr pmRA Proper motion in RA (s/Julian century) J2000
30 A1 --- DE- Declination J2000 (sign)
31- 32 I2 deg DEd Declination Epoch + Equinox J2000 (degrees)
34- 35 I2 arcmin DEm Declination J2000 (minutes)
37- 41 F5.2 arcsec DEs Declination J2000 (seconds)
44- 50 F7.2 10mas/yr pmDE Proper motion in DE (arcsec/Julian century),
J2000 system
53- 54 I2 h RA1950h Right Ascension Equinox=B1950 Equinox=B1950
(hours)
56- 57 I2 min RA1950m Right Ascension B1950 (minutes)
59- 64 F6.3 s RA1950s Right Ascension B1950 (seconds)
67- 73 F7.3 10ms/yr pmRA1950 Proper motion in RA (s/Julian century),
B1950 system
76 A1 --- DE1950- Declination B1950 (sign)
77- 78 I2 deg DE1950d Declination Epoch + Equinox B1950 (degrees)
80- 81 I2 arcmin DE1950m Declination B1950 (minutes)
83- 87 F5.2 arcsec DE1950s Declination B1950 (seconds)
90- 96 F7.2 10mas/yr pmDE1950 Proper motion in DE (arcsec/Julian century),
B1950 system
99-103 F5.2 yr EpRA-1900 Mean epoch in RA (1900+)
104-108 F5.1 ms e_RAs Mean error of RA at the mean epoch (1)
109-113 F5.0 0.01ms/yr e_pmRA Mean error of pmRA in 0.001s/century
117-121 F5.2 yr EpDE-1900 Mean epoch in DE (1900+)
123-126 F4.1 10mas e_DEs Mean error of DE at the mean epoch (1)
129-131 F3.0 0.1mas/yr e_pmDE Mean error of pmDE in 0.01arcsec/century
136-140 F5.2 mag Vmag Photoelectric apparent visual magnitude
from various sources
141 A1 --- n_Vmag [V] 'V' if the star is variable
143-148 A6 --- Sp Spectrum mainly from HD; byte 146 is '+'
if two spectra
151-156 F6.4 arcsec plx [0/.075]? Parallax from preliminary
version of van Altena's catalogue of
trigonometric parallaxes (I/174/)
159-165 F7.2 km/s RV ? Radial velocity from various sources
168-172 I5 --- AGK3R [1/21499]? Designation in AGK3R catalogue
(Smith 1990, catalogue I/161/)
175-179 I5 --- SRS ]50000/70000[? Designation in
Southern Reference System + 50000
181-186 I6 --- HD [1/225300] HD Designation (2)
188 I1 --- n_DM [1/3] DM designator: 1=BD, 2=CoD, 3=CPD
189-196 A8 --- DM Durchmusterung identification
199-203 I5 --- GC Designation in General Catalogue (I/113/)
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Note (1): the last digit of the mean errors of mean positions for the
less precise stars in the IRS list (numbers larger than 4000) is
always a zero; it is not a computed digit but has merely been added
to pad the field.
Note (2): stars with composite spectrum have two successive HD numbers;
the smaller one is only given.
Courtesy: Heiner Schwan, ARI
History:
* 17-Apr-2002: standardized
(End) Francois Ochsenbein [CDS] 04-Jul-1994