I/285 The GPM catalog (Rybka+, 1997-2001)
GPM - a catalog of absolute proper motions of stars with respect to galaxies.
Rybka S.P., Yatsenko A.I.
<Main Astronomical Observatory of the National Academy of Sciences,
Kiev, Ukraine, (2001)>
=1997KFNT...13e..70R 1997KFNT...13e..70R
+1999KFNT...15a..79R 1999KFNT...15a..79R
+2000KFNT...16a..69R 2000KFNT...16a..69R
ADC_Keywords: Positional data ; Photographic catalog ; Proper motions
Description:
GPM is the newer version of the General Compiled Catalogue of Absolute
Proper Motions, derived with respect to galaxies within the plan
called Catalogue of Faint Stars (KSZ, Deutch, 1952, Trans. IAU, Vol.
8, 789). The programme was proposed for several observatories of the
former Soviet Union, China, Rumania and Spain. There are some
resulting individual catalogues of absolute proper motions of stars
compiled at five observatories (Kiev, Pulkovo, Moscow, Tashkent and
Shanghai). The GPM combines these catalogues and comprises absolute
proper motions for 52805 stars from 8 to 15.5mag in 185 fields north
of -25 degrees of declination. The size of each region is nearly 1.5
square degrees. The mean standard error of proper motion is 8 mas/yr
on average. Detailed information on the construction methodology and
input data can be found in (Rybka & Yatsenko, 1997KFNT...13e..70R 1997KFNT...13e..70R).
In addition to absolute proper motions the GPM contains accurate
equatorial coordinates and three-colour B V R photometry for the vast
majority of its stars (Rybka 2000KFNT...16e..60R 2000KFNT...16e..60R).
Additional information was selected from all available sources. Usage
of the ACT catalog should provide improved positions (mostly in
removing of systematic errors) and improved photometry (because the
brightest stars in each GPM region had B and V magnitudes measured by
the Tycho experiment on the Hipparcos satellite). The mean accuracies
achived, as demonstrated by comparison with above catalogue, are 250
mas for the positions and 0.22mag for B magnitude and 0.26mag for
B-V colour.
The GPM gives right ascensions and declinations for equinox J2000.0
and epoch copied from available sources. They were only presented to
identify the GPM stars with those from other catalogues. The compiled
catalogue also presents B magnitudes and B-V colours. They were
converted to be close to Johnson system. The Tycho stars were also
identified in the GPM catalogue. A search area with a radius of 2
arcseconds was used to search for multiple entries of the same star,
which may be appeared in the region overlap areas. The detected
entries were then removed from the final catalogue. The procedure
decreased the number of stars in the catalogue by about 0.4 %.
The adopted catalogue organization includes data in 185 regions sorted
according the KSZ region numbers. The data were then sorted nearly in
right ascension order within each GPM region. All information needed
to associate a point on the sky with region number and provide a more
rapid access to that region are given in file region.dat.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gpm.dat 73 52805 The GPM Catalogue
region.dat 37 185 Index to the GPM regions
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See also:
I/220 : The HST Guide Star Catalog (Lasker+ 1992)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/246 : The ACT Reference Catalog (Urban+ 1997)
I/243 : The PMM USNO-A1.0 Catalogue (Monet 1997)
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
http://www.mao.kiev.ua/ast/gpm : GPM catalog Home Page
Byte-by-byte Description of file: gpm.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- KSZ *Region number
6- 15 F10.6 deg RAdeg Right Ascension J2000 at "Epoch"
16- 25 F10.6 deg DEdeg Declination J2000 at "Epoch"
27 I1 --- u_Pos *[1]? Discrepancy flag for Positions
29- 35 F7.2 yr Epoch *? Epoch of Positions
36- 41 F6.1 mas/yr pmRA Absolute proper motion in RA*cos(DE)
42- 47 F6.1 mas/yr pmDE Absolute proper motion in DE
49- 52 F4.1 mag Bmag Blue magnitude in Johnson B band
54 I1 --- u_Bmag *[1]? Discrepancy flag for Photometry
56- 60 F5.2 mag B-V *?=-9.99 Johnson B-V colour
62- 65 I4 --- TYC1 *? Tycho identifier 1
67- 71 I5 --- TYC2 *? Tycho identifier 2
73 I1 --- TYC3 *? Tycho identifier 3
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Note on KSZ:
Numbers from 1 to 205 are given according to the KSZ plan,
numbers larger than 205 are NGC numbers of the nearest
galaxies from region center.
Note on u_Pos :
blank: typical quality for positions, the standard error = 250 mas
1 : extremely low quality for positions, the standard error may be
larger than 18 arcseconds
Note on Epoch:
blank: extremely low quality for positions
Note on u_Bmag :
blank: typical quality for photometry, the standard error=0.22 mag
1 : low quality for photometry, the standard error=0.35 mag
Note on B-V:
B-V = -9.99 if no data
Note on TYC1, TYC2, TYC3:
Tyc1 is the GSC region number, Tyc2 is the running number within the
region, Tyc3 is a component identifier (normally 1)
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Byte-by-byte Description of file: region.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- KSZ The KSZ region number
6- 10 I5 --- RecNo The record number for the first star in each
GPM region
12- 15 I4 --- Nstar The number of stars in the GPM region
17- 26 F10.6 deg RAdeg Region center RA (J2000.0)
27- 36 F10.6 deg DEdeg Region center DE (J2000.0)
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Acknowledgements: Yatsenko Anatoliy
(End) Patricia Bauer [CDS] 27-Sep-2001