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J/MNRAS/426/1137       Radial velocities in NGC 1851          (Sollima+, 2012)
Spectroscopic hint of a cold stream in the direction of the globular cluster
NGC 1851.
    Sollima A., Gratton R.G., Carballo-Bello J.A., Martinez-Delgado D.,
    Carretta E., Bragaglia A., Lucatello S., Penarrubia J.
   <Mon. Not. R. Astron. Soc. 426, 1137 (2012)>
   =2012MNRAS.426.1137S
ADC_Keywords: Clusters, globular ; Photometry, UBV ; Radial velocities

Keywords: methods: data analysis - methods: observational -
          techniques: radial velocities -
          globular clusters: individual: NGC 1851 - Galaxy: halo -
          Galaxy: stellar content

Description:
    We present the result of a spectroscopic survey performed in the
    outskirts of the globular cluster NGC1851 with Visible MultiObject
    Spectrograph (VIMOS)/Very Large Telescope (VLT) with the
    medium-resolution grism coupled with the GG475 filter. The spectral
    coverage is from 5000 to 8000Å with a resolution R∼580. Target
    stars have been selected from the photometry of Carballo-Bello et al.
    (2012MNRAS.419...14C), sampling a wide range in magnitude and colour
    (16<B<22, 0.6<B-R<2.1). We report the radial velocities of 107 stars
    in a region between 12 and 33 arcmin around the cluster centre.

    Observations have been performed during three nights in 2008 October
    at the Very Large Telescope's (VLT) Unit Telescope 3 (Melipal) at the
    European Southern Observatory (ESO), Cerro Paranal, Chile, equipped
    with the VIsible MultiObject Spectrograph (VIMOS).
    Velocities have been obtained by cross-correlating the spectra of the
    individual exposures with a GIRAFFE solar spectrum smoothed to the
    resolution of our targets using the region of the H-alpha line.
    Typical errors are of about 15km/s.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        56      107   Radial velocities of target stars


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   3-  5  I3    ---     ID        [9/730] Identification number
   8- 17  F10.7 deg     RAdeg     Right ascension (J2000)
  19- 29  F11.7 deg     DEdeg     Declination (J2000)
  31- 36  F6.3  mag     Bmag      B magnitude
  38- 43  F6.3  mag     Vmag      V magnitude
  46- 50  F5.1  km/s    HRV       Heliocentric radial velocity
  53- 56  F4.1  km/s    e_HRV     Heliocentric radial velocity error


Acknowledgements:
     Antonio Sollima, antonio.sollima(at)oapd.inaf.it
(End)      Antonio Sollima [INAF-OaPd], Patricia Vannier [CDS]       17-Oct-2012