J/A+A/463/1061 UBV photometry of V379 Cep (Harmanec+, 2007)
V379 Cep: a quadruple system of two binaries.
Harmanec P., Mayer P., Prsa A., Bozic H., Eenens P., Guinan E.F., McCook G.,
Koubsky P., Ruzdjak D., Engle S., Sudar D., Skoda P., Slechta M., Wolf M.,
Yang S.
<Astron. Astrophys. 463, 1061 (2007)>
=2007A&A...463.1061H 2007A&A...463.1061H
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Keywords: stars: binaries: eclipsing - stars: early-type -
stars: individual: V379 Cep - stars: binaries: spectroscopic -
stars: fundamental parameters
Abstract:
Several binaries with masses anomalously small for their observed
spectral types have been discussed in the astronomical literature and
interpreted as the result of envelope ejection. V379 Cep is one of
these objects.
We obtained new series of electronic spectra and UBV photometry
of V379 Cep and analysed them in an effort to check whether the
conclusion about its anomalous masses may not be premature.
Description:
Reduction of new spectra was carried out in the IRAF and SPEFO
programs. New photometry was reduced and transformed to the standard
system using the HEC22 program. Orbital elements were derived with the
FOTEL program and via disentangling with the program KOREL. The final
combined solution was obtained with the program PHOEBE. Some initial
period searches were carried out using the phase dispersion
minimalization technique.
Objects:
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RA (2000) DE Designation(s)
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20 43 13.6831 +57 06 50.387 V379 Cep = HR 7940 = HD 197770
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2a.dat 30 43 Differential Stromgren b photometry
magnitude differences V379 Cep - HD 198679
Courtesy: Dr. M. Jerzykiewicz
table2b.dat 32 112 All-sky Hipparcos Hp photometry
Courtesy: M.A.C. Perryman & ESA
table2c.dat 77 640 Individual differential UBV observations from
several stations.
Courtesy: Geoffrey Clayton, Petr Harmanec,
Hrvoje Bozic, Ed Guinan
table2d.dat 42 771 *V379 Cep b photometry & UBV (0.06-d normals)
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Note on table2d.dat: Normal 0.06-d data averages from all stations and passbands
which were actually used in the analyses of light curves in the paper.
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See also:
J/A+A/294/135 : Rapid variations of Eta Cen (Stefl+, 1995)
J/A+A/304/235 : UBV Photometry of phi Per (Bozic+, 1995)
J/A+A/324/965 : UBV photometry of V360 Lac (Hill+ 1997)
J/A+A/328/551 : Spectroscopic data of 4 Herculis (Koubsky+ 1997)
J/A+AS/125/75 : UBV photometry of Be stars (Pavlovski+ 1997)
J/A+A/337/183 : V1046 Ori uvby photometry and radial velocities (Bolton+ 1998)
J/A+A/387/580 : UBV photometry of V832 Cyg (Harmanec+, 2002)
J/A+A/416/669 : UBV photometry of HD 6226 (Bozic+, 2004)
J/A+A/419/607 : Long-term variations of kappa Dra (Saad+, 2004)
J/A+A/455/1037 : V360 Lac spectroscopy (Linnell+, 2006)
J/A+A/459/849 : Radial velocities of ups Sgr (Koubsky+, 2006)
Byte-by-byte Description of file: table2a.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
17- 21 F5.3 mag dbmag Stromgren b magnitude difference
V379 Cep - HD 198679
27- 30 F4.2 -- w weight of the data point
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Byte-by-byte Description of file: table2b.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
15- 18 F4.2 -- w weight of the data point
21- 25 F5.3 mag Vmag Johnson V magnitude (1)
28- 32 F5.3 mag Bmag Johnson B magnitude (1)
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Note (1): Transformation to Johnson V and B by P. Harmanec
(assuming B-V=0.336, U-B=-0.473).
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Byte-by-byte Description of file: table2c.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
15- 18 F4.2 -- w weight of the data point
21- 25 F5.3 mag Vmag Johnson V magnitude
27- 32 F6.3 mag Bmag ?=99.999 Johnson B magnitude
34- 39 F6.3 mag Umag ?=99.999 Johnson U magnitude
41- 46 F6.3 mag B-V ?=99.999 Johnson B-V index
48- 53 F6.3 mag U-B ?=99.999 Johnson U-B index
56- 60 F5.3 -- X air mass
62- 66 F5.3 mag dX air-mass difference var. - comp.
68- 73 I6 -- HDcomp HD number of the comparison star used
76- 77 I2 -- Station [1/30] code for observing station (1)
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Note (1): Station as follows:
1 = Hvar 0.65m reflector, EMI tube
15 = Phoenix-10 (0.254m) Automatic Photoelectric Telescope and
photon-counting photometer
16 = Villanova University Four-College 0.8m Automatic Photoelectric
Telescope
30 = San Pedor Martir 0.84m reflector and Cuenta-pulsos photometer
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Byte-by-byte Description of file: table2d.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
17- 21 F5.3 mag mag Observed magnitudes averaged over 0.06d
for each station and passband
27- 31 F5.2 -- weight Weight of the data point
36- 37 I2 -- Station Code for observing station (1)
42 A1 -- Filter [bUBV] Filter
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Note (1): Station as follows:
1 = Lowell, b filter
2 = Hvar, V filter
12 = Hvar, B filter
22 = Hvar, U filter
3 = Hipparcos, V filter
4 = Phoenix, V filter
14 = Phoenix, B filter
24 = Phoenix, U filter
5 = SPM, V filter
15 = SPM, B filter
25 = SPM, V filter
6 = Villan, V filter
16 = Villan, B filter
26 = Villan, U filter
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Acknowledgements:
Petr Harmanec, hec(at)sunstel.asu.cas.cz
Mikolaj Jerzykiewicz (Table 2A)
Geoffrey Clayton (Table 2C, station 15 data)
Important note: Drs. Geoffrey Clayton and Mikolaj Jerzykiewicz gave us
their permissions to publish their unpublished individual observations
of V379 Cep here.
(End) Patricia Vannier [CDS] 07-Dec-2006