J/MNRAS/402/2720 UBVI photometry of 5 open clusters (Piatti+, 2010)
New fundamental parameters of the Galactic open clusters Berkeley 26,
Czernik 27, Melotte 72, NGC 2479 and BH 37.
Piatti A.E., Claria J.J., Ahumada A.V.
<Mon. Not. R. Astron. Soc., 402, 2720-2734 (2010)>
=2010MNRAS.402.2720P 2010MNRAS.402.2720P
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD
Keywords: techniques: photometric -
open clusters and associations: individual: Berkeley 26 -
open clusters and associations: individual: Czernik 27 -
open clusters and associations: individual: Melotte 72 -
open clusters and associations: individual: NGC 2479 -
open clusters and associations: individual: BH 37
Abstract:
We have obtained CCD UBVIKC photometry down to V∼21.0 for the open
clusters Berkeley 26, Czernik 27, Melotte 72, NGC 2479 and BH 37. The
latter has never been studied before. Cluster stellar density profiles
were obtained from star counts in appropriate-sized boxes distributed
throughout the entire observed fields. Based on different measured
indices, we estimate the ages of Berkeley 26, Melotte 72 and NGC 2479.
On the other hand, we indicate possible solutions for the cluster
fundamental parameters by matching theoretical isochrones which
reasonably reproduce the main cluster features in their
colour-magnitude diagrams. In the case of NGC 2479, the cluster E(BV)
and E(VI) colour excesses and apparent distance modulus were estimated
from the fit of the zero-age main sequence to the colour-colour and
colour-magnitude diagrams, respectively.
Description:
We obtained images for the cluster sample in 2000 December with the
UBVIKC filters and a 2048x2048-pixel Tektronix CCD attached to the
CTIO 0.9m telescope. The detector used has a pixel size of 24um,
producing a scale of 0.4arcsec/pix on the chip (focal ratio of
f/13.5) and a 13.6x13.6-arcmin2 field of view.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 71 5 Basic parameters of the five clusters
table3.dat 92 2226 CCD VI data of stars in the field of Berkeley 26
table4.dat 92 2385 CCD BVI data of stars in the field of Czernik 27
table5.dat 92 2770 CCD BVI data of stars in the field of Melotte 72
table6.dat 92 2490 CCD UBVI data of stars in the field of NGC 2479
table7.dat 92 3000 CCD BVI data of stars in the field of BH 37
fig1.gif 512 339 *Finding charts
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Note on fig1.gif: Berkeley 26 (top left), Czernik 27 (top right),
Melotte 72 (middle left), GC 2479 (middle right) and BH 37 (bottom).
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See also:
J/A+AS/107/39 : IC 2714 UBV photometry (Claria+ 1994)
J/A+AS/127/423 : VI photometry of Westerlund 1 and 2 (Piatti+ 1998)
J/A+AS/128/131 : UBV photometry of NGC 2323 (Claria+ 1998)
J/ApJS/116/263 : VI photometry of open clusters (Piatti+ 1998)
J/A+A/360/529 : BVI photometry of 4 young open clusters (Piatti+, 2000)
J/A+A/370/931 : BVI photometry of 4 open clusters (Piatti+, 2001)
J/A+A/379/453 : BVI photometry of 5 open cluster candidates (Piatti+, 2001)
J/A+A/388/179 : BVI photometry of two open clusters (Piatti+, 2002)
J/A+A/399/543 : Photometry and Coravel obs. of IC 2488 (Claria+, 2003)
J/A+A/409/541 : UBV photometry of IC 2395 (Claria+, 2003)
J/MNRAS/340/1249 : VIc magnitudes in NGC 2194 (Piatti+, 2003)
J/MNRAS/346/390 : VI and CMT1 photometry of NGC 2627 (Piatti+, 2003)
J/MNRAS/349/641 : VIc, CT1 magnitudes in Trumpler 5 (Piatti+, 2004)
J/A+A/418/979 : VI and CT1 photometry in NGC 2324 field (Piatti+, 2004)
J/A+A/421/991 : CT1 photometry in Tombaugh 1 (Piatti+, 2004)
J/PASP/117/22 : NGC 6318 CCD BVI photometry (Piatti+, 2005)
J/other/NewA/11.262 : BVIc photometry in Lynga 11 (Piatti+, 2006)
J/MNRAS/367/599 : BVI photometry of NGC 5288 (Piatti+, 2006)
J/MNRAS/377/1737 : BVI photometry of NGC 2489 (Piatti+, 2007)
J/MNRAS/397/1073 : UBVI photometry in NGC 2587 (Piatti+, 2009)
J/PASP/122/288 : UBVIKC photometry in NGC 2309 (Piatti+, 2010)
J/MNRAS/408/1147 : 4 Galactic open clusters UBVI photometry (Piatti+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Cluster Cluster name
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 20 I2 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 30 I2 arcsec DEs Declination (J2000)
32- 37 F6.2 deg GLON Galactic longitude
39- 43 F5.2 deg GLAT Galactic latitude
45- 50 A6 --- Class Trumpler class
52- 55 F4.1 arcmin Diam Angular diameter
57- 60 I4 --- Nmeas Number of measured stars
62- 64 I3 --- Ninf Number of inferred cluster stars
66- 71 A6 --- FileName Name of the table with photometry
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Byte-by-byte Description of file: table[34567].dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Seq Sequential number within the cluster
8- 15 F8.3 pix Xpos X position (1)
17- 24 F8.3 pix Ypos Y position (1)
27- 32 F6.3 mag Vmag Johnson V magnitude
34- 38 F5.3 mag e_Vmag rms uncertainty on Vmag
41 I1 --- o_Vmag Number of observations in Vmag
44- 49 F6.3 mag U-B ?=99.999 Johnson U-B colour index
51- 55 F5.3 mag e_U-B ?=9.999 rms uncertainty on U-B
58 I1 --- o_U-B ?=0 Number of observations in U-B
61- 66 F6.3 mag B-V ?=99.999 Johnson B-V colour index
68- 72 F5.3 mag e_B-V ?=9.999 rms uncertainty on B-V
75 I1 --- o_B-V ?=0 Number of observations in B-V
78- 83 F6.3 mag V-I ?=99.999 Johnson-Cousins V-I colour index
85- 89 F5.3 mag e_V-I ?=9.999 rms uncertainty on V-I
92 I1 --- o_V-I ?=0 Number of observations in V-I
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Note (1): North is up and east is to the left; 1 pix=0.4arcsec.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 05-Aug-2013