Access to Astronomical Catalogues

J/MNRAS/365/110     CCD BVI photometry of 3 open clusters  (Pietrukowicz+, 2006)
CCD photometry of distant open clusters NGC 2425, Haffner 10 and Czernik 29.
    Pietrukowicz P., Kaluzny J., Krzeminski W.
   <Mon. Not. R. Astron. Soc. 365, 110 (2006)>
   =2006MNRAS.365..110P
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI ;
              Photometry, Cousins
Keywords: Hertzsprung-Russell (HR) diagram -
          open clusters and associations: individual: NGC 2425 -
          open clusters and associations: individual: Haffner 10 -
          open clusters and associations: individual: Czernik 29

Abstract:
    We present BVI photometry for poorly known southern hemisphere open
    clusters: NGC 2425, Haffner 10 and Czernik 29. We have calculated the
    density profile and established the number of stars in each cluster.
    The colour-magnitude diagrams of the objects show a well-defined main
    sequence. However, the red giant clump is present only in NGC 2425 and
    Haffner 10. For these two clusters we estimated the age as
    2.5±0.5Gyr assuming metallicity of Z=0.008. The apparent distance
    moduli are in the ranges 13.2<(m-M)_V<13.6 and 14.3<(m-M)_V<14.7,
    while heliocentric distances are estimated to be 2.9<d<3.8kpc and
    3.1<d<4.3kpc, respectively for NGC 2425 and Haffner 10. The angular
    separation of 2.4deg (150pc at mean distance) may indicate a common
    origin of the two clusters.

Description:
    Photometry of two fields which include three open clusters: NGC 2425,
    Haffner 10 and Czernik 29.

    For each star of the clusters: equatorial coordinates, Johnson-Cousins
    system magnitudes and colours with uncertainties.
    Instrumentation: 1.02-m f/10.0 Ritchey-Chretien + 1024x1024 CCD with a
    scale 0.695 arcsec/pixel at Las Campanas Observatory.
    Date of observations: Feb 20/21 and Feb 21/22, 1995.
Objects:
    ----------------------------------------------------
       RA  (2000)  DE       Designation(s)
    ----------------------------------------------------
    07 38 18    -14 52.0    NGC 2425 = C 0736-147
    07 28 36    -15 23.0    Cl Haffner 10 = C 0726-152
    07 28 18    -15 24.0    Cl Czernik 29 = C 0726-153
    ----------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
ngc2425.dat       97     2676   Photometry of the field with NGC 2425
h10cz29.dat       97     3359   Photometry of the field with Haffner 10 and Czernik 29


See also:
    J/A+AS/108/151 : Open clusters CCD photometry. I. (Kaluzny, 1994)
    J/A+AS/114/1   : CCD UBVI photometry of NGC 6791 (Kaluzny+, 1995)
    J/A+AS/121/455 : BVI photometry of stars in Berkeley 18 (Kaluzny 1997)
    J/A+AS/133/25  : CCD BVI photometry of Trumpler 5 (Kaluzny 1998)
    J/MNRAS/299/1  : BVI photometry in four open clusters (Sagar+, 1998)
    J/MNRAS/327/23 : CCD UBVRI photometry of 7 open star clusters (Sagar+, 2001)


Byte-by-byte Description of file: ngc2425.dat h10cz29.dat

   Bytes Format Units   Label    Explanations

   1-  4  I4    ---     Seq      Star number in the field
       7  I1    h       RAh      Right ascension J2000 (hours)
   9- 10  I2    min     RAm      Right ascension J2000 (minutes)
  12- 16  F5.2  s       RAs      Right ascension J2000 (seconds)
      18  A1    ---     DE-      Declination J2000 (sign)
  19- 20  I2    deg     DEd      Declination J2000 (degrees)
  22- 23  I2    arcmin  DEm      Declination J2000 (minutes)
  25- 29  F5.2  arcsec  DEs      Declination J2000 (seconds)
  32- 37  F6.3  mag     Bmag     ?=99.999 B Johnson magnitude
  39- 43  F5.3  mag     e_Bmag   ?=9.999 B magnitude error
  46- 51  F6.3  mag     Vmag     V Johnson magnitude
  53- 57  F5.3  mag     e_Vmag   rms uncertainty on Vmag
  60- 65  F6.3  mag     Icmag    ?=99.999 I Cousins magnitude
  67- 71  F5.3  mag     e_Icmag  ?=9.999 rms uncertainty on Icmag
  74- 78  F5.3  mag     B-V      ?=9.999 Johnson B-V colour index
  80- 84  F5.3  mag     e_B-V    ?=9.999 rms uncertainty on B-V
  87- 91  F5.3  mag     V-Ic     ?=9.999 Johnson-Cousins V-I colour index
  93- 97  F5.3  mag     e_V-Ic   ?=9.999 rms uncertainty on V-Ic


Acknowledgements: Pawel Pietrukowicz, pietruk(at)camk.edu.pl

(End)  P. Pietrukowicz [Copernicus Astr. Center], P. Vannier [CDS]   20-Oct-2005