J/other/BASI/40.51 Cl* NGC 2539 CKY V3 and V4 BV light curves (Kiron+, 2012)
A photometric study of contact binaries V3 and V4 in NGC 2539.
Kiron Y.R., Sriram K., Vivekananda Rao P.
<Bull. Astron. Soc. India, 40, 51-64 (2012)>
=2012BASI...40...51K 2012BASI...40...51K
ADC_Keywords: Clusters, open ; Stars, variable ; Photometry, UBV
Keywords: stars: binaries: eclipsing - stars: binaries: general -
stars: distances - open clusters and associations: general
Abstract:
CCD photometric observations of the eclipsing contact binaries (EW
type) V3 and V4 of the cluster NGC 2539 were made in the B and V bands
using the 2m telescope at the IUCAA-Girawali Observatory in India. The
light curves have been obtained and using the Wilson-Devinney code,
the combined photometric solutions have been presented here. The
photometric solutions have revealed that both V3 and V4 are W-type
contact binary systems with mass ratios of 0.806 and 1.001
respectively. Revised orbital periods, absolute masses and radii of
the components have been obtained.
Description:
The observations of open cluster NGC 2539 were carried out at the
IUCAA-Girawali Observatory (IGO) using the 2m telescope.
The observations in B and V bands were carried out on four nights,
during 2010 February 06-09.
Objects:
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RA (2000) DE Designation(s)
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08 10 46.1 -12 53 14 V3 = Cl* NGC 2539 CKY V3
08 10 38.4 -12 50 18 V4 = Cl* NGC 2539 CKY V4
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 27 110 B-band CCD observations of variables V3 and V4
of NGC 2539
table3.dat 27 102 V-band CCD observations of variables V3 and V4
of NGC 2539
table4.dat 68 12 CCD times of light minima for the observed
variables V3 and V4 of NGC 2539
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Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian Date
15- 19 F5.3 mag DV3 Differential magnitude for V3 variable (1)
21- 25 F5.3 mag DV4 Differential magnitude for V4 variable (2)
27 A1 --- Band [BV] Observed band
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Note (1): V3: Epoch=2455235.3972(23)(HJD), Per=0.2919997(35)d
Note (2): V4: Epoch=2455235.3692(42)(HJD), Per=0.3399994(36)d
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Name Variable name (V3 or V4)
4- 14 F11.3 d HJD Heliocentric Julian date
16- 17 A2 --- Min Type of Minima (I Primary II Secondary)
19- 25 F7.1 -- E Number of the cycle
27- 34 F8.5 d O-C O-C residuals
36- 68 A33 --- Ref References
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Jul-2012