J/AJ/137/2949 MY Cyg differential light curves (Tucker+, 2009)
Orbital solutions and absolute elements of the eclipsing binary MY Cygni.
Tucker R.S., Sowell J.R., Williamon R.M., Coughlin J.L.
<Astron. J., 137, 2949-2955 (2009)>
=2009AJ....137.2949T 2009AJ....137.2949T
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binaries: close - binaries: eclipsing - binaries: spectroscopic
Abstract:
Differential UBV photoelectric photometry for the eclipsing binary
MY Cyg is presented. The Wilson-Devinney program is used to
simultaneously solve the three light curves together with previously
published radial velocities. A comparison is made with the previous
solution found with the Russell-Merrill method. We examine the
long-term apsidal motion of this well-detached, slightly eccentric
system. We determine absolute dimensions, discuss metallicity/Am-star
issues, and estimate the evolutionary status of the stars.
Description:
The photometric measurements of MY Cyg were obtained with the 36-inch
Cassegrain reflector at the Fernbank Science Center Observatory
(Atlanta, GA) during 1972, 1973, and 1974. A total of 1733
observations were made in each color with the standard UBV filters of
the Johnson-Morgan (1953ApJ...117..313J 1953ApJ...117..313J) system combined with an
unrefrigerated EMI 6256s photomultiplier.
Object:
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RA (2000) DE Designation(s)
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20 20 03.4 +33 56 35 MY Cyg = HD 193637
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 1733 MY Cyg photometric observations
table2.dat 25 28 *MY Cyg radial velocities
table7.dat 79 309 MY Cyg photometric observations by Coughlin 2007
(undergraduate thesis, Emory Univ; same
comparison star as Williamon 1975AJ.....80..976W 1975AJ.....80..976W)
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Note on table2.dat: These radial velocities were previously published by
Popper (1971ApJ...169..549P 1971ApJ...169..549P ) and are provided here for convenience
and completeness of our orbital solution.
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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- 13 F13.5 d HJDV V band Heliocentric Julian date
15- 20 F6.3 mag DVmag Differential Johnson V band magnitude
22- 34 F13.5 d HJDB B band Heliocentric Julian date
36- 41 F6.3 mag DBmag Differential Johnson B band magnitude
43- 55 F13.5 d HJDU U band Heliocentric Julian date
57- 62 F6.3 mag DUmag Differential Johnson U band magnitude
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Heliocentric Julian date
13- 18 F6.1 km/s RVp Radial velocity of the primary
20- 25 F6.1 km/s RVs Radial velocity of the secondary
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJDB ? B band Heliocentric Julian date
14- 19 F6.3 mag DBmag ? Differential B band magnitude
21- 32 F12.4 d HJDV ? V band Heliocentric Julian date
34- 39 F6.3 mag DVmag ? Differential V band magnitude
41- 52 F12.4 d HJDR ? R band Heliocentric Julian date
54- 59 F6.3 mag DRmag ? Differential R band magnitude
61- 72 F12.4 d HJDI ? I band Heliocentric Julian date
74- 79 F6.3 mag DImag ? Differential I band magnitude
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Aug-2011