J/AJ/134/1432 Proper motions in Plaut's window (Vieira+, 2007)
Proper motions in the Galactic Bulge: Plaut's window.
Vieira K., Casetti-dinescu D.I., Mendez R.A., Rich R.M., Girard T.M.,
Korchagin V.I., Van Altena W., Majewski S.R., Van Den Bergh S.
<Astron. J., 134, 1432-1446 (2007)>
=2007AJ....134.1432V 2007AJ....134.1432V
ADC_Keywords: Stars, nearby ; Proper motions ; Photometry, infrared
Keywords: astrometry - catalogs - Galaxy: bulge - Galaxy: disk -
stars: kinematics
Abstract:
A proper-motion study of a field of 20'x20' inside Plaut's
low-extinction window (l,b) = (0°, -8°) has been completed.
Relative proper motions and photographic BV photometry have been
derived for ∼21000 stars reaching to V∼20.5mag, based on the
astrometric reduction of 43 photographic plates, spanning over 21yr of
epoch difference. Proper-motion errors are typically 1mas/yr, and
field-dependent systematics are below 0.2mas/yr. Cross-referencing
with the 2MASS catalog yielded a sample of ∼8700 stars, from which
predominantly disk and bulge subsamples were selected photometrically
from the JH color-magnitude diagram. The two samples exhibited
different proper-motion distributions, with the disk displaying the
expected reflex solar motion as a function of magnitude.
Description:
This investigation is based on 43 photographic plates, taken with five
different telescopes: the 51cm Double Astrograph at the Yale Southern
Observatory (YSO) in El Leoncito, Argentina; the 2.1m at KPNO; the du
Pont 2.5m at Las Campanas; the Blanco 4m at CTIO; and the Hale 5m
at Palomar Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 70 21660 Plaut's window catalog of proper motions
table4.dat 70 8721 Plaut's window stars with 2MASS data
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/289 : UCAC2 Catalogue (Zacharias+ 2004)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [VCM2007] Plaut's identification number
7- 16 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) (1)
18- 27 F10.6 deg DEdeg Declination in decimal degrees (J2000) (1)
29- 33 F5.2 mag Vmag The V band magnitude
35- 39 F5.2 mag B-V The (B-V) color index
41- 42 I2 --- Npl Number of plates in which the star appears
44- 50 F7.2 mas/yr pmGlon Proper motion in galactic longitude
52- 58 F7.2 mas/yr pmGlat Proper motion in galactic latitude
60- 64 F5.2 mas/yr e_pmGlon Error in pmGLON
66- 70 F5.2 mas/yr e_pmGlat Error in pmGLAT
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Note (1): As obtained from a solution with UCAC2 (Cat. I/289).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [VCM2007] Plaut's identification number
7- 23 A17 --- 2MASS The 2MASS identification (1)
25- 30 F6.3 mag Jmag The 2MASS J band magnitude
32- 36 F5.3 mag e_Jmag The error in Jmag
38- 43 F6.3 mag Hmag The 2MASS H band magnitude
45- 49 F5.3 mag e_Hmag The error in Hmag
51- 56 F6.3 mag Kmag The 2MASS K band magnitude
58- 62 F5.3 mag e_Kmag The error in Kmag
64 I1 --- Pop Population index (2)
66- 70 A5 --- Dupl Duplicate match identification (3)
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Note (1): Where the 2MASS identification is based on the sexagesimal sky
coordinates of the star.
Note (2): Population index code as follows:
0 = Undetermined (no population was explicitly assigned to the star)
1 = Bulge RGB
2 = Disk MS
Note (3): Identification of another Plaut's star that was cross-referenced
to the same 2MASS star. Our frames have better resolution than 2MASS.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 31-Oct-2009