J/AJ/136/1667 VV Vir BVRI differential photometry (Samec+, 2008)
Photometric analysis and 60-Year period study of the detached but near-contact
system VV Virginis.
Samec R.G., Labadorf C.M., Behn G.A., Chamberlain H.A., Faulkner D.R.,
Van Hamme W.
<Astron. J., 136, 1667-1676 (2008)>
=2008AJ....136.1667S 2008AJ....136.1667S
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binaries: close - binaries: eclipsing - stars: evolution -
stars: individual (VV Virginis)
Abstract:
VV Vir is a near-contact but detached mid-G-type eclipsing binary with
an asymmetrical light curve due to a weak but regular mass exchange.
The binary is apparently approaching contact and has a stream impact
spot on the secondary component that is responsible for a
quadratically [dP/P=(-7.8±0.2)x10-11] decreasing period. Our period
study included more than 140 minima observed over the past 60 years.
We explore other possible near-contact configurations for this binary.
Description:
Our CCD observations of VV Vir were taken on 2006 May 15-17 at Lowell
Observatory and May 28 of the same year at Kitt Peak in remote mode.
Objects:
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RA (2000) DE Designation(s)
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14 05 25.2 -10 09 22 VV Vir = SV* HV 3677
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 75 166 Photometry of VV Vir
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 F5.3 mag DBmag Differential B band magnitude (1)
7- 18 F12.4 d HJD-B Heliocentric Julian date of B band observation
20- 24 F5.3 mag DVmag ? Differential V band magnitude (1)
26- 37 F12.4 d HJD-V ? Heliocentric Julian date of V band observation
39- 43 F5.3 mag DRmag ? Differential R band magnitude (1)
45- 56 F12.4 d HJD-R ? Heliocentric Julian date of R band observation
58- 62 F5.3 mag DImag ? Differential I band magnitude (1)
64- 75 F12.4 d HJD-I ? Heliocentric Julian date of I band observation
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Note (1): variable - comparison (GSC 5557-0259, RA=14:04:42.34, DE=-10:04:07.1)
star.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 08-Apr-2011