J/AJ/153/134  Proper motions and photometry of stars in NGC 3201 (Sariya+, 2017)
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A proper motions study of the globular cluster NGC 3201.
    Sariya D.P., Jiang I.-G., Yadav R.K.S.
   <Astron. J., 153, 134-134 (2017)>
   =2017AJ....153..134S    (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, globular ; Proper motions ; Photometry, UBVRI
Keywords: astrometry - catalogs - globular clusters: individual: NGC 3201

Abstract:
    With a high value of heliocentric radial velocity, a retrograde orbit,
    and suspected to have an extragalactic origin, NGC 3201 is an
    interesting globular cluster for kinematical studies. Our purpose is
    to calculate the relative proper motions (PMs) and membership
    probability for the stars in the wide region of globular cluster NGC
    3201. PM based membership probabilities are used to isolate the
    cluster sample from the field stars. The membership catalog will help
    address the question of chemical inhomogeneity in the cluster. Archive
    CCD data taken with a wide-field imager (WFI) mounted on the ESO 2.2m
    telescope are reduced using the high-precision astrometric software
    developed by Anderson et al. for the WFI images. The epoch gap between
    the two observational runs is ~14.3 years. To standardize the BVI
    photometry, Stetson's secondary standard stars are used. The CCD data
    with an epoch gap of ~14.3 years enables us to decontaminate the
    cluster stars from field stars efficiently. The median precision of
    PMs is better than ~0.8mas/yr for stars having V<18mag that increases
    up to ~1.5mas/yr for stars with 18<V<20mag. Kinematic membership
    probabilities are calculated using PMs for stars brighter than
    V~20mag. An electronic catalog of positions, relative PMs, BVI
    magnitudes, and membership probabilities in the ~19.7x17arcmin^2^
    region of NGC 3201 is presented. We use our membership catalog to
    identify probable cluster members among the known variables and X-ray
    sources in the direction of NGC 3201.

Description:
    To determine the PMs of the stars in this work, we used archive images
    (http://archive.eso.org/eso/eso_archive_main.html) from observations
    made with the 2.2m ESO/MPI telescope at La Silla, Chile. This
    telescope contains a mosaic camera called the Wide-Field Imager (WFI),
    consisting of 4*2 (i.e., 8 CCD chips). Since each CCD has an array of
    2048*4096 pixels, WFI ultimately produces images with a 34*33arcmin^2^
    field of view.

    The observational run of the first epoch contains two images in B,V
    and I bands, each with 240s exposure time observed on 1999 December
    05. In the second epoch, we have 35 images with 40s exposure time
    each in V filter observed during the period of 2014 April 02-05. Thus
    the epoch gap between the data is ~14.3 years.

File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
table3.dat      13         14    Membership probability of the known variables
                                  in the direction of NGC 3201 and X-ray sources
                                  from Webb et al. 2006 (Cat. J/A+A/445/155)
table4.dat     130       8322    The membership catalog for NGC 3201
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See also:
 VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
 J/ApJ/801/69     : EWs for giant star members of NGC3201 (Mucciarelli+, 2015)
 J/A+A/584/A59    : Proper motions and membership in NGC 6366 (Sariya+, 2015)
 J/other/RMxAA/50.307 : RR Lyr light curves in NGC 3201 (Arellano Ferro+, 2014)
 J/MNRAS/430/3350 : Proper motions and membership in NGC 3766 (Yadav+, 2013)
 J/AcA/62/357     : Proper motions in 6 globular clusters (Zloczewski+, 2012)
 J/A+A/543/A87    : Stars proper motions and photometry in M55 (Sariya+, 2012)
 J/A+A/497/371    : UBVI photometry of NGC 3201 (Kravtsov+, 2009)
 J/A+A/484/609    : BVI photometry and proper motions in M67 (Yadav+, 2008)
 J/A+A/445/155    : XMM count-rates in M 55 and NGC 3201 (Webb+, 2006)
 J/AJ/123/279     : VI Photometry and Variables in NGC 3201 (von Braun+, 2002)
 J/A+AS/131/89    : NGC 1750 + NGC 1758 proper motions (Tian+ 1998)
 J/ApJ/454/788    : Radial velocities and BV photometry of NGC 3201 (Cote+ 1995)
 J/ApJS/90/83     : Binaries in NGC 3201 (Cote+, 1994)
 http://archive.eso.org/eso/eso_archive_main.html : ESO Science Archive

Byte-by-byte Description of file: table3.dat
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   Bytes Format Units   Label    Explanations
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       1  A1    ---   f_Sce      [VX] Flag on Source (V=known variable in the
                                  direction of NGC 3201; X=X-ray source from
                                  Webb et al. 2006, Cat. J/A+A/445/155)
   2-  4  I3    ---     Sce      Identification number of the source (1)
   6-  8  I3    %       Mm       ? Membership probability
  10- 13  I4    ---     Star     ? Star number in our catalog
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Note (1): The variable stars of NGC 3201 have been compiled on Clement's webpage
     of the catalog of variable stars in globular clusters
     (http://www.astro.utoronto.ca/~cclement/cat/C1015m461). Recently some new
     variables were detected by Kaluzny et al. (2016AcA....66...31K). We found
     four variable stars in common with our catalog. V137 comes from the
     variables listed in Kaluzny et al. (2016AcA....66...31K), and the
     coordinates of the other three variables have been taken from Clement's
     webpage.
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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-  4  I4    ---      Star [1/8322] Running sequential number (ID)
   6-  7  I2    h        RAh  Hour of Right Ascension (J2000)
   9- 10  I2    min      RAm  Minute of Right Ascension (J2000)
  12- 16  F5.2  s        RAs  Second of Right Ascension (J2000)
      18  A1    ---      DE-  Sign of the Declination (J2000)
  19- 20  I2    deg      DEd  Degree of Declination (J2000)
  22- 23  I2    arcmin   DEm  Arcminute of Declination (J2000)
  25- 28  F4.1  arcsec   DEs  Arcsecond of Declination (J2000)
  30- 38  F9.4  pix      Xpos [1544.4/4979.9] X position in CCD pixels
  40- 48  F9.4  pix      Ypos [247.47/4516.05] Y position in CCD pixels
  50- 58  F9.4  mas/yr   pmRA [-104.1/76.65] Relative proper motion along RA
                               {mu}_{alpha}_cos({delta})
  60- 65  F6.4  mas/yr e_pmRA [0.04/2] rms uncertainty on pmRA
                               {sigma}_{mu}{alpha}cos({delta})_
  67- 74  F8.4  mas/yr   pmDE [-70.9/34.47] Relative proper motion along DEC
                               {mu}_{delta}_
  76- 81  F6.4  mas/yr e_pmDE [0.06/2] rms uncertainty on pmDE
                               {sigma}_{mu}{delta}_
  83- 89  F7.4  mag      Bmag [12.55/21.62] Johnson B magnitude
  91- 96  F6.4  mag    e_Bmag [0/0.17] rms uncertainty on B mag {sigma}_B_
  98-104  F7.4  mag      Vmag [11.76/20.1] Johnson V magnitude
 106-111  F6.4  mag    e_Vmag [0.0001/0.19] rms uncertainty on V mag {sigma}_V_
 113-119  F7.4  mag      Imag [9.93/19.12] Cousins I magnitude
 121-126  F6.4  mag    e_Imag [0.0002/0.2] rms uncertainty on I mag {sigma}_I_
 128-130  I3    %        Mm   [0/100] Proper-motion membership probability
                               P_{mu}_ (please refer to Section 3 in the paper
                               for details)
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History:
    From electronic version of the journal

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(End)                 Prepared by [AAS]; Sylvain Guehenneux [CDS]    26-Jul-2017