J/A+A/417/945 BVI & JHK photometry of NGC 3960 (Prisinzano+, 2004)
Parameter properties and stellar population of the old open cluster NGC 3960.
Prisinzano L., Micela G., Sciortino S., Favata F.
<Astron. Astrophys., 417, 945-960 (2004)>
=2004A&A...417..945P 2004A&A...417..945P
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI ;
Photometry, infrared
Keywords: Galaxy: open clusters and associations: individual: NGC 3960 -
techniques: photometric - astrometry -
stars: luminosity function, mass function
Abstract:
We present a BVI photometric and astrometric catalogue of the open
cluster NGC 3960, down to limiting magnitude V∼22, obtained from
observations taken with the Wide Field Imager camera at the MPG/ESO
2.2m Telescope at La Silla. The photometry of all the stars detected
in our field of view has been used to estimate a map of the strong
differential reddening affecting this area. Our results indicate that,
within the region where the cluster dominates, the E(V-I) values range
from 0.21 up to 0.78, with E(V-I)=0.36 (E(B-V)=0.29) at the nominal
cluster centroid position; color excesses E(V-I) up to 1 mag have been
measured in the external regions of the field of view where field
stars dominate. The reddening-corrected color-magnitude diagram (CMD)
allows us to conclude that the cluster has an age between 0.9 and
1.4Gyr and a distance modulus of (V-MV)0=11.35.
Based on observations made with the European Southern Observatory
telescopes obtained from the the ESO/ST-ECF Science Archive Facility.
Description:
Optical and infrared (2MASS, II/246) photometric catalog of
candidate members of the open cluster NGC 3960.
File table5.dat contains RA and DE (J2000.0) coordinates in decimal
degrees, an identification number for each star, the V, B, I
magnitudes and the associated uncertainties.
File table6.dat contains RA and DE (J2000.0) coordinates in decimal
degrees, an identification number for each star, the J, H, Ks
magnitudes and the associated uncertainties taken from the All-Sky
Point Source Catalogue of the Two Micron All Sky Survey (2MASS,
II/246).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 90 2118 Astrometric optical photometric catalog of
candidate members of the open cluster NGC 3960
table6.dat 90 749 Astrometric infrared photometric catalog of
candidate members of the open cluster NGC 3960
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+A/385/867 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2002)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 12 F12.8 deg RAdeg Right ascension (J2000)
17- 28 F12.8 deg DEdeg Declination (J2000)
31- 36 I6 -- Seq Identification number
40- 45 F6.3 mag Vmag V magnitude
50- 54 F5.3 mag e_Vmag Error on V magnitude
58- 63 F6.3 mag Bmag B magnitude
68- 72 F5.3 mag e_Bmag Error on B magnitude
76- 81 F6.3 mag Imag I magnitude
86- 90 F5.3 mag e_Imag Error on I magnitude
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.8 deg RAdeg Right ascension (J2000)
17- 28 F12.8 deg DEdeg Declination (J2000)
32- 36 I5 -- Seq Identification number
40- 45 F6.3 mag Jmag 2MASS J magnitude
50- 54 F5.3 mag e_Jmag Error on J magnitude
58- 63 F6.3 mag Hmag 2MASS H magnitude
68- 72 F5.3 mag e_Hmag Error on H magnitude
76- 81 F6.3 mag Ksmag 2MASS Ks magnitude
86- 90 F5.3 mag e_Ksmag Error on Ks magnitude
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Acknowledgements:
Infrared photometry is based on data from 2MASS, a joint project of the
University of Massachusetts and the Infrared Processing and Analysis
Center/California Institute of Technology, funded by the National
Aeronautics and Space Administration and the National Science Foundation
Lorendana Prisinzano
(End) L. Prisinzano [INAF - OAPA, Italy], Patricia Bauer [CDS] 06-Apr-2004