ADC/CDS Standard Document for Catalog:/catalogs/1/1175/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
I/175 Fifth Fundamental Catalogue (FK5) - Extension (Fricke+ 1991)
================================================================================
Fifth Fundamental Catalogue (FK5) Part II. The FK5 Extension
Fricke W., Schwan H., Corbin T.E. (in collaboration with Bastian U.,
Bien R., Cole C., Jackson R., Jaehrling R., Jahreiss H., Lederle T.,
Roeser S.)
<Veroeff. Astron. Rechen-Institut Heidelb. No. 33, (1991)>
=1991VeARI..33....1F
================================================================================
ADC_Keywords: Positional data; Proper motions
Description:
The FK5 Extension provides improved mean positions and proper
motions for the 3117 new fundamental stars. The machine version of
the catalog contains the positions and proper motions of the
Extension stars for the epochs and equinoxes J2000.0 and B1950.0,
the mean epochs of individual observed right ascensions and
declinations used to determine the final positions, the mean errors
of the final positions and proper motions for the reported epochs,
and ancillary data such as magnitudes, spectral types, parallaxes,
and radial velocities. Cross identifications to the numbering
systems of the AGK3R, SRS, HD, DM, and GC catalogs are also
included.
Introduction:
The Fifth Fundamental Catalogue (FK5) Part II (which may be
referred to by the alternate name FK5 Extension) provides mean
positions and proper motions at equinox and epoch J2000.0 for 3117
new fundamental stars. The purpose of the FK5, Part II, is mainly
to extend the fundamental system defined by the FK5, Part I (the
so-called Basic FK5; Fricke et al. 1988) to about magnitude 9.5.
The positions and proper motions given in the FK5 Extension are in
accordance with the IAU (1976) system of astronomical constants;
this means that the proper motions are based on the new values for
the precessional quantities, the terms of elliptic aberration are
eliminated from the mean positions, the correction for the error in
the FK4 equinox and its fictitious motion are applied, and the
systematic corrections FK5-FK4, as given in the Basic FK5 (page
86), have been taken into account. More than 200 catalogs providing
star positions obtained from throughout the world have been used in
the compilation of the FK5 Extension.
The source reference should be consulted, along with the FK5 Basic
catalog (Fricke et al. 1988) for more detailed information
regarding the motivation for construction of the FK5, the
determination of its equator and equinox, the expressions for
general precession, a discussion of the FK5 system, systematic
differences between the FK4 and FK5, the transformation of
observational catalogs to the FK5 system and to the reference
system J2000.0, and more thorough descriptions of the data
contained in the FK5 catalog. In fact, the source reference should
be consulted by all users before utilizing the FK5 data for
astrometric applications.
The trigonometric parallax and radial velocity fields are blank
when data are missing, and because parallax and radial velocity can
validly be zero, the fields should be checked for blanks before the
data are used. The user should note that the file is ordered by FK5
number, which means that the stars are arranged neither by right
ascension nor by declination.
See also:
I/149 : Part I: Basic Fundamental Stars
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
fk5e.dat 190 3117 FK5 Extension - Part II
--------------------------------------------------------------------------------
Byte-by-byte Description of file: fk5e.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- FK5 *FK5 Extension number
6- 7 I2 h RAh *Right ascension J2000.0 (hours)
Equinox=J2000, Epoch=J2000
9- 10 I2 min RAm *Right ascension J2000.0 (minutes)
12- 17 F6.3 s RAs *Right ascension J2000.0 (seconds)
19- 25 F7.3 s/ha pmRA *Centennial proper motion J2000.0
27- 27 A1 --- DE- *Declination, J2000.0 (sign)
28- 29 I2 deg DEd *Declination, J2000.0 (degrees)
Equinox=J2000, Epoch=J2000
31- 32 I2 arcmin DEm *Declination J2000.0 (minutes)
34- 38 F5.2 arcsec DEs *Declination J2000.0 (seconds)
40- 46 F7.2 arcsec/ha pmDE *Centennial proper motion J2000.0
48- 49 I2 h RAh1950 Right ascension B1950.0 (hours)
Equinox=B1950, Epoch=B1950
51- 52 I2 min RAm1950 Right ascension B1950.0 (minutes)
54- 59 F6.3 s RAs1950 Right ascension B1950.0 (seconds)
61- 67 F7.3 s/ha pmRA1950 Centennial proper motion B1950.0
69- 69 A1 --- DE-1950 Declination B1950.0 (sign)
70- 71 I2 deg DEd1950 Declination B1950.0 (degrees)
Equinox=B1950, Epoch=B1950
73- 74 I2 arcmin DEm1950 Declination B1950.0 (minutes)
76- 80 F5.2 arcsec DEs1950 Declination B1950.0 (seconds)
82- 88 F7.2 arcsec/a2 pmDE1950 Centennial proper motion B1950.0
90- 94 F5.2 a EpRA *Epoch (RA)
95- 99 F5.1 ms e_RAs *Mean error in RA
100-105 F6.1 ms/ha e_pmRA *Mean error in centennial PM
107-111 F5.2 a EpDE *Epoch (Dec)
113-116 F4.1 10mas e_DEs *Mean error in Dec
118-122 F5.1 10mas/ha e_pmDE *Mean error in centennial PM
124-128 F5.2 mag Vmag *V magnitude
129 A1 --- n_Vmag *Magnitude flag
131-137 A7 --- Sp Spectral type(s)
139-145 F7.4 arcsec plx ?Parallax
147-153 F7.2 km/s RV ?Radial velocity
155-159 A5 --- AGK3R *AGK3R (catalog <I/161>) number
161-165 A5 --- SRS SRS (catalog <I/138>) number
167-172 A6 --- HD HD (catalog <III/135>) number
174-183 A10 --- DM *DM identification
186-190 A5 --- GC GC (catalog <I/113>) number
--------------------------------------------------------------------------------
Note on FK5:
These numbers begin at 2000 (the first is 2003) to distinguish
them from the numbers in the Basic FK5.
Note on RAh, RAm, RAs, DE-, DEd, DEm, DEs:
The terms of elliptic aberration have been eliminated from the mean
positions. The B1950.0 data have been computed from the J2000.0
data using a procedure described in the source reference based on
the IAU (1976) system of astronomical constants (see also Lieske
1979).
Note on pmRA and pmDE:
Centennial values for J2000.0 and B1950.0, referred to one Julian
century.
Note on EpRA and EpDE:
Mean epoch (-1900.0) of the individual observed right ascensions
and declinations.
Note on e_RAs, e_DEs, e_pmRA, e_pmDE:
These mean errors do not include those of the FK5 system and of the
equinox and equator.
Note on Vmag:
For physical double stars, the magnitudes of the brighter
components are given (both are given in the published catalog).
Note on n_Vmag:
'V' indicates that a range of magnitudes is given in the published
catalog.
'v' indicates variability (amplitude exceeds 0.3 magnitude).
Note on AGK3R:
Only three stars (1367, 1553, 1598) in the Basic FK5 have this
number.
Note on DM:
BD = Bonner Durchmusterung (Argelander 1859-62, Kuestner 1903 <I/122>)
SD = Southern Durchmusterung (Schoenfeld 1886 <I/119>)
CD = Cordoba Durchmusterung (Thome 1892- 1932 <I/114>)
CP = Cape Photographic Durchmusterung (Gill and Kapteyn 1895-1900 <I/108>)
--------------------------------------------------------------------------------
History:
The machine-readable Fifth Fundamental Catalogue (FK5) Part II was
received on magnetic tape from Dr. H. Schwan of the Astronomisches
Rechen-Institut, Heidelberg on 19 August 1991. The logical record
length of the catalog, as received, was 220 bytes. The following
format changes were made by Wayne H. Warren Jr., (with Dr. Schwan's
concurrence) in order to make the data easier to interpret and to
conserve storage:
1. The DM identifiers, which were single-digit numerical codes,
were changed to "BD", "CD", and "CP".
2. Plus signs were added to the trigonometric-parallax data, even
though no negative parallaxes are included in the catalog, to
indicate that negative parallaxes are possible.
3. Multiple blanks between data fields were removed, as were blanks
beyond the end of each record, to decrease the logical record
length from 220 bytes to 190 bytes.
4. Byte 129 (the variability flag) had only upper case "V" flags as
received. These were left for cases where magnitude ranges are
given in the published catalog, but were changed to lower case when
a lower case "v" is reported in the published edition.
Acknowledgements:
Dr. H. Schwan and his colleagues at the Astronomisches
Rechen-Institut generously reviewed a draft copy of the original
documentation prior to its final release for distribution with
machine-readable copies of the catalog, as did Dr. T. E. Corbin of
the U. S. Naval Observatory. Dr. Warren prepared the original
document which has been reformatted here in the new standard form.
References:
Corbin, T. E. 1978, in IAU Colloquium 48, Modern Astrometry, ed. F.
V. Frochazka and R. H. Tucker (Vienna, University Obs.), p. 505
Fricke, W., and Kopff, A. 1963, Fourth Fundamental Katalog (FK4),
Veroeff. Astron. Rechen-Institut Heidelb. No. 10. (Catalogue <I/143>)
Fricke, W., Schwan, H., and Corbin, T. (in collaboration with
Bastian, U., Bien, R., Cole, C., Jackson, R., Jaehrling, R.,
Jahreiss, H., Lederle, T., and Roeser, S.) 1991, Fifth
Fundamental Catalogue FK5), Part II. The FK5 Extension, New
Fundamental Stars, Veroeff. Astron. Rechen-Institut Heidelburg
No. 33
Fricke, W., Schwan, H., and Lederle, T. (in collaboration with
Bastian, U., Bien, R., Burkhardt, G., du Mont, B., Hering, R.,
Jaehrling, R., Jahreiss, H., Roeser, S., Schwerdtfeger, H. M.,
and Walter, H. G.) 1988, Fifth Fundamental Catalogue (FK5), Part
I. The Basic Fundamental Stars, Veroeff. Astron. Rechen-Institut
Heidelburg No. 32, catalog <I/149>
Lieske, J. H. 1979, A&A, 73, 282
Scott, F. P., and Smith, C. A., Jr. 1971, Comparison of the SAO and
AGK3R Star Catalogues, in Conference on Photographic Astrometric
Techniques, ed. H. K. Eichhorn, NASA CR-1825, catalog <I/161>
Smith, C. A., Corbin, T. E., Hughes, J. A., Jackson, E. S.,
Krutskaya, E. V., Polozhentsev, A. D., Polozhentsev, D. D.,
Yagudin, L. I., and Zverev, M. S. 1990, in IAU Symposium No.
141, Inertial Coordinate System on the Sky, ed. J. H. Lieske and
V. K. Abalakin (Dordrecht, Reidel), p. 457
================================================================================
(End) Nancy G. Roman [NSSDC/ADC] 08-Dec-1994