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 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
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File Summary:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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
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Acknowledgements: Pawel Pietrukowicz, pietruk(at)camk.edu.pl
(End) P. Pietrukowicz [Copernicus Astr. Center], P. Vannier [CDS] 20-Oct-2005