J/AcA/62/357 Proper motions in 6 globular clusters (Zloczewski+, 2012)
A proper motion study of the globular clusters M4, M12, M22, NGC 3201, NGC 6362
and NGC 6752.
Zloczewski K., Kaluzny J., Rozyczka M., Krzeminski W., Mazur B.,
Thompson I.B.
<Acta Astron., 62, 357-375 (2012)>
=2012AcA....62..357Z 2012AcA....62..357Z
ADC_Keywords: Clusters, globular ; Proper motions
Keywords: globular clusters: individual: M4, M12, M22, NGC 3201, NGC 6362,
NGC 6752 - astrometry - blue stragglers
Abstract:
We derive relative proper motions of stars in the fields of globular
clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752 based on a
uniform data set collected between 1997 and 2008. We assign a
membership class for each star with a measured proper motion and show
that these membership classes can be successfully used to eliminate
field stars from color-magnitude diagrams of the clusters. They also
allow for the efficient selection of rare objects such as
blue/yellow/red stragglers and stars from the asymptotic giant branch.
Description:
The images analyzed in this paper are a part of the data collected between
1997 and 2008 within the CASE project (Cluster AgeS Experiment).
All observations were made with the 2.5-m du Pont telescope at LCO using
the same detector and the same set of V and I filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 43 8 Equatorial coordinates of field centers
m12_bv.dat 130 12654 M12 proper motions catalog, B-V colour index
m22_vi.dat 130 10961 M22 proper motions catalog, V-I colour index
m4_bv.dat 130 13036 M4 proper motions catalog, B-V colour index
n3201_vi.dat 130 22544 NGC3201 proper motions catalog, V-I colour index
n6362_bv.dat 130 11781 NGC6362 proper motions catalog, B-V colour index
n6752_bv.dat 130 16394 NGC6752 proper motions catalog, B-V colour index
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See also:
J/A+A/373/899 : New variables in M22 globular cluster (Kaluzny+, 2001)
J/AcA/50/337 : OGLE LMC star clusters (Pietrzynski+, 2000)
J/AJ/124/1486 : M4 UBV color-magnitude diagrams (Mochejska+, 2002)
J/A+A/424/1101 : Variable Stars in the field of ω Cen (Kaluzny+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster Cluster name
9 A1 --- --- [F]
10 I1 --- F [1/2]? Field number (for M4 and NGC3201)
12- 20 F9.5 deg RAdeg Field center Right ascension (J2000)
22- 30 F9.5 deg DEdeg Field center Declination (J2000)
32- 43 A12 --- FileName Name of the file with data
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Byte-by-byte Description of file: m*.dat n*.dat
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Bytes Format Units Label Explanations
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1 I1 --- F [1/2]? Field number for M4 and NGC 3201
2- 7 I6 --- Star Star identification number within the field
9- 18 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
20- 29 F10.6 deg DEdeg Declination in decimal degrees (J2000)
31- 38 F8.3 pix Xpos X position on reference frames
40- 47 F8.3 pix Ypos Y position on reference frames
50- 56 F7.2 mas/yr pmRA Proper motion along RA (pmRA*cosDE)
59- 65 F7.2 mas/yr e_pmRA rms uncertainty on pmRAcosDE
69- 74 F6.2 mas/yr pmDE Proper motion along DE
78- 83 F6.2 mas/yr e_pmDE rms uncertainty on pmDE
85- 86 I2 --- Nep Number of epochs used
88- 93 F6.3 yr dT Temporal baseline
95 I1 --- Mm [0/2]? Cluster membership (1)
97-102 F6.3 mag Vmaga V magnitude (approximate transformation)
104-109 F6.3 mag Vmag ?=0 V magnitude (standard system)
112-116 F5.3 mag e_Vmag ?=9.999 rms uncertainty on Vmag
118-123 F6.3 mag Col ?=9.999 B-V or V-I colour index
126-130 F5.3 mag e_Col ?=9.999 rms uncertainty on Col
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Note (1): Cluster membership flag as follows:
0 = field star
1 = possible member
2 = likely member
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History:
Copied at http://case.camk.edu.pl
(End) Patricia Vannier [CDS] 05-Feb-2013