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I/208 The 90000 stars Supplement to the PPM Catalogue (Roeser+, 1994)
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The 90000 stars Supplement to the PPM Star Catalogue
Roeser S., Bastian U., Kuzmin A.
<Astron. Astrophys. Suppl. Ser. 105, 301 (1994)>
=1994A&AS..105..301R (SIMBAD/NED BibCode)
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ADC_Keywords: Positional data ; Proper motions
Description:
Since its appearance in 1966, the SAO Catalogue (SAO, 1966) has been
the primary source for stellar positions and proper motions. Typical
values for the rms errors are 1 arcsec in the positions at epoch 1990,
and 1.5 arcsec/century in the proper motions. The corresponding
figures for the AGK3 (Heckmann et al., 1975) on the northern
hemisphere are 0.45 arcsec and 0.9 arcsec/century. Common to both
catalogues is the fact that proper motions area derived from two
observational epochs only. Both catalogues are nominally on the
B1950/FK4 coordinate system.
The PPM Star Catalogue (Roeser and Bastian, 1991, Bastian et al.,
1993; for a short description see Roeser and Bastian, 1993)
effectively replaced these catalogues by providing more precise
astrometric data for more stars on the J2000/FK5 coordinate system.
Compared to the SAO Catalogue the improvement in precision is about a
factor of 3 on the northern and a factor of 6 to 10 on the southern
hemisphere. In addition, the number of stars is increased by about 50
percent. Typical values for the rms errors on the northern hemisphere
are 0.27 arcsec in the positions at epoch 1990, and 0.42
arcsec/century in the proper motions. On the southern hemisphere PPM
is much better, the corresponding figures being 0.11 arcsec and 0.30
arcsec/century. The improvement over the SAO Catalogue was made
possible by the advent of new big catalogues of position measurements
and by the inclusion of the century-old Astrographic Catalogue (AC)
into the derivation of proper motions (for a description of AC see
Eichhorn, 1974). But even PPM does not fully exploit the treasure of
photographic position measurements available in the astronomical
literature of the last 100 years. The Astrographic Catalogue contains
roughly four million stars that are not included in PPM. For most of
them no precise modern-epoch position measurements exist. Thus it is
not yet possible to derive proper motions with PPM quality for all AC
stars. But among the 4 million there is a subset of some 100,000 CPC-2
stars that are not included in PPM. These stars constitute the 90,000
Stars Supplement to PPM.
See file desc for complete explanations provided by the authors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ppm3.dat 131 89676 The catalogue
desc.txt 78 261 Authors' description
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Byte-by-byte Description of file: ppm3.dat
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Bytes Format Units Label Explanations
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2- 7 I6 --- PPM *[700001/789676]+ Designation of the star
10- 18 A9 --- DM *Durchmusterung, BD or CD
20- 23 F4.1 mag Mag *Magnitude, Visual if Flag5 is 'V'
25- 26 A2 --- Sp *Spectral type
28- 29 I2 h RAh Right Ascension for the Equinox=J2000.0 and
Epoch=J2000.0, on the system of FK5
31- 32 I2 min RAm Right Ascension J2000 (minutes)
34- 39 F6.3 s RAs Right Ascension J2000 (seconds)
42 A1 --- DE- Declination J2000 (sign)
43- 44 I2 deg DEd Declination for the equinox and epoch
J2000.0, on the system of FK5
46- 47 I2 arcmin DEm Declination J2000 (minutes)
49- 53 F5.2 arcsec DEs Declination J2000 (seconds)
56- 62 F7.4 s/yr pmRA *Proper motion in RA, J2000
64- 69 F6.3 arcsec/yr pmDE *Proper motion in DE, J2000
71- 72 I2 --- Npos *Number of individual positions used
74- 75 I2 10mas e_RA *Mean error of RA
77- 78 I2 10mas e_DE *Mean error of DE
80- 83 F4.1 mas/yr e_pmRA *Mean error of pmRA
85- 88 F4.1 mas/yr e_pmDE *Mean error of pmDE
90- 94 F5.2 yr EpRA-1900 *Weighted mean epoch, RA and pmRA
96-100 F5.2 yr EpDE-1900 *Weighted mean epoch, DE and pmDE
102-107 I6 --- SAO [1/258997]? SAO Designation
109-114 I6 --- HD [1/359083]? Henry Draper Designation
117-125 A9 --- CPD Cape Photographic Durchmustrung Designation
127 A1 --- Flag1 *'P' - problem, 'C' - comment
128 A1 --- Flag2 *'D' - double star
129 A1 --- Flag3 * - not used
130 A1 --- Flag4 *'F' - member of FK5 <I/149>
131 A1 --- Flag5 *'R' - remark, 'V' - V mag (CPC-2)
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Note on PPM:
Designation of the star in PPM South starting with No. 181732,
see chapter 3 of description file.
Note on DM:
Designation of the star in the Bonner Durchmusterung (for zones from
-02 to -22 degrees) or in the Cordoba Durchmusterung (zones -23 to
-89 degrees).
Note on Mag and Sp:
See chapter 3 of description file.
Note on pmRA and pmDE:
Proper motion in right ascension for epoch and equinox J2000.0,
on the system of FK5 given in seconds of time per Julian year.
Note on Npos:
Number of individual published positions used for the
derivation of the position and proper motion given.
Note on e_RA:
Mean error of right ascension at the mean epoch right ascension EpRA,
multiplied by the cosine of declination, given in units of 0.01
seconds of arc.
Note on e_DE:
Mean error of right ascension at the mean epoch of declination EpDE,
given in units of 0.01 seconds of arc.
Note on e_pmRA:
Mean error of the proper motion in right ascension, multiplied by
the cosine of declination, given in units of 0.001 second of arc
per Julian year.
Note on e_pmDE:
Mean error of the proper motion in declination given in units of
0.001 seconds of arc per Julian year.
Note on EpRA-1900:
Weighted mean epoch of the measured positions used for the
derivation of RA and pmRA, given in years since 1900.0.
Note on EpDE-1900:
Weighted mean epoch of the measured positions used for the
derivation of DE and pmDE, given in years since 1900.0.
Note on Flag1:
P - problem case, preferably not to be used as astrometric reference star.
C - a critical comment is given in the List of Critical Comments.
Not to be used as astrometric reference star.
Note on Flag2:
D - double star, preferably not to be used as astrometric reference star.
Note on Flag3:
Not used, void for consistency with PPM (north).
Note on Flag4:
F - member of FK5, mostly bright stars, original FK5 data are given.
Note on Flag5:
R - a remark is given in the List of Remarks on Individual Stars.
V - the magnitude is a photographic V magnitude copied from CPC-2.
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References:
Bastian, U., Roeser, S., et al., 1993, PPM Star Catalogue, Vols.
III and IV, positions and proper motions of 197179 stars
south of -2.5 degrees declination. Astronomisches Rechen-
Institut, Heidelberg. Spektrum Akademischer Verlag,
Heidelberg, Berlin, New York, 1993. <I/193>
Eichhorn, H., 1974, Astronomy of Star Positions, Frederick
Ungar Publ. Co., New York.
Heckmann, O., Dieckvoss, W., Kox, H., Guenther, A., Brosterhus, E.,
1975, AGK3. Star catalogue of positions and proper motions
north of -2.5 declination. Hamburg-Bergedorf 1975. <I/69>
Roeser, S., Bastian, U., 1991, PPM Star Catalogue, Vols. I and II,
positions and proper motions of 181731 stars north of
-2.5 degrees declination. Astronomisches Rechen-Institut,
Heidelberg. Spektrum Akademischer Verlag, Heidelberg,
Berlin, New York, 1991. <I/146>
Roeser, S., Bastian, U., 1993, The final PPM Star Catalogue for
both hemispheres, Bull. Inform. CDS, 42, 11.
=1993BICDS..42...11R
SAO, Staff of, 1966, Star Catalogue. Positions and proper
motions of 258997 stars for epoch and equinox of 1950.0.
Publ. Smithsonian Inst. of Washington, D.C., No. 4562. <I/131>
See also:
I/69 : AGK3 Catalogue
I/131 : SAO Star Catalogue
I/146 : PPM-North Catalogue
I/149 : Fifth Fundamental Catalogue (FK5)
I/193 : PPM-South Catalogue
I/195 : FOCAT-S Catalogue, the main source of new data in the
Southern hemisphere.
I/206 : Bright Star Supplement to PPM
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(End) Michel Creze [CDS] and Gail L. Schneider [NSSDC/ADC] 11-Nov-1994