J/other/NewA/36.50 V873 Per BVR light curves (Kriwattanawong+, 2015)
A photometric study of a weak-contact binary: V873 Per.
Kriwattanawong W., Poojon P.
<New Astron., 36, 50-55 (2015)>
=2015NewA...36...50K 2015NewA...36...50K
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: stars: binaries: close - stars: binaries: eclipsing -
stars: individual (V873 Per)
Abstract:
We present a photometric study of a weak-contact binary V873 Per. New
observations in BVR filter bands showed asymmetric light curves to be
a negative type of the O'Connell effect, which can be described by
magnetic activity of a cool spot on the more massive component. Our
photometric solutions showed that V873 Per is a W-type with a mass
ratio of q=2.504(±0.0029), confirming the results of Samec et al.
(2009IBVS.5901....1S 2009IBVS.5901....1S). The derived contact degree was found to be
f=18.10%(±1.36%). Moreover, our analysis found the cyclic variation
with the period of about 4yr that could be due to existence of the
third companion in the system or the mechanism of magnetic activity
cycle in the binary. While available data indicated that the long-term
orbital period tends to be stable rather than decreasing.
Description:
BVR photometric observations of V873 Per were carried out on the 0.5-m
telescope at Sirindhorn Observatory, Chiang Mai University. The
photometric data were taken during four nights (November 27-30,
2011), by using SBIG CCD (Model of ST10-XME), with exposure time of
90s. A total of 855 individual observations were obtained in three
filter bands (285 observations per filter band). The IRAF package was
used for data reduction and the BVR magnitude measurements.
Objects:
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RA (2000) DE Designation(s)
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02 47 08.21 +41 22 31.9 V873 Per = V* V873 Per
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 43 285 New CCD photometric observations in BVR filter
bands for V873 Per
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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- 6 F6.4 d HJD-B Heliocentric Julian date of B band
observation (HJD-2455890)
8- 13 F6.3 mag dBmag Differential B band magnitude
16- 21 F6.4 d HJD-V Heliocentric Julian date of V band
observation (HJD-2455890)
23- 28 F6.3 mag dVmag Differential V band magnitude
31- 36 F6.4 d HJD-R Heliocentric Julian date of R band
observation (HJD-2455890)
38- 43 F6.3 mag dRmag Differential R band magnitude
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Jul-2015