J/MNRAS/414/3711 Proper motion study of M55 stars (Zloczewski+, 2011)
A proper motion study of the globular cluster M55.
Zloczewski K., Kaluzny J., Thompson I.B.
<Mon. Not. R. Astron. Soc., 414, 3711-3718 (2011)>
=2011MNRAS.414.3711Z 2011MNRAS.414.3711Z
ADC_Keywords: Clusters, globular ; Proper motions
Keywords: astrometry - binaries: eclipsing - blue stragglers -
globular clusters: individual: NGC 6809 (M55) -
galaxies: individual: Sagitarrius dSph
Abstract:
We have derived the absolute proper motion (PM) of the globular
cluster M55 using a large set of CCD images collected with the du Pont
telescope between 1997 and 2008.
We find (pmRAcosDE, pmDE)=(-3.31±0.10, -9.14±0.15)mas/yr relative
to background galaxies. Membership status was determined for 16945
stars with 14<V<21 from the central part of the cluster.
Description:
The images of M55 analysed in this paper were selected from the data
collected by the Cluster AgeS Experiment (CASE) project during the
period 1997-2008. Observations were made with the 2.5-m du Pont
telescope at Las Campanas Observatory. All images were obtained with
the same detector and the same set of filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 106 16945 The PM catalogue
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See also:
J/AJ/96/1632 : CCD BV photometry in M55 (Schade+ 1988)
J/AJ/119/1760 : M54 and Sgr dSph VI photometry (Layden+, 2000)
J/AJ/134/825 : BVI photometry in M55 (NGC 6809) (Vargas+, 2007)
J/A+A/414/503 : Abundances in the Sgr dSph (Bonifacio+, 2004)
J/A+A/465/815 : Abundances of Sgr dSph stars (Sbordone+, 2007)
J/A+A/513/A62 : Sgr dSph VIMOS photometry & radial velocities (Giuffrida+ 2010)
J/A+A/520/A95 : Abundances of red giants in M54 and Sgr dSph (Carretta+, 2010)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- ID Star ID (starting with 1 and 2 for fields
F1 and F2, respectively)
10- 19 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
at epoch Epoch
21- 30 F10.6 deg DEdeg Declination in decimal degrees (J2000)
at epoch Epoch
32- 38 F7.2 yr Epoch Epoch of observation (1997.41 and 1999.46
for fields F1 and F2, respectively)
40- 48 F9.4 pix Xpos X pixel coordinate in reference frame
50- 58 F9.4 pix Ypos Y pixel coordinate in reference frame
60- 66 F7.3 mas/yr pmRA Proper motion along RA, pmRA*cosDE
68- 72 F5.3 mas/yr e_pmRA rms uncertainty on pmRA
74- 80 F7.3 mas/yr pmDE Proper motion along DE
82- 86 F5.3 mas/yr e_pmDE rms uncertainty on pmDE
88- 89 I2 --- Npt Number of epochs used
91- 97 F7.4 yr dT Temporal baseline
99 I1 --- Mm [0/2] Cluster membership (from proper motion):
0=non-member, 1=possible member, 2=member
101-106 F6.3 mag Vmag V magnitude
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Feb-2012