J/MNRAS/414/3711     Proper motion study of M55 stars        (Zloczewski+, 2011)
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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
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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

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(End)                                      Patricia Vannier [CDS]    21-Feb-2012