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J/AZh/88/894        UBVRI light curves of EQ Boo              (Volkov+, 2011)

Multiplicity and apsidal motion in the eclipsing binary EQ Boo. Volkov I.M., Volkova N.S., Nikolenko I.V., Chochol D. <Astron. Zh. 88, 894 (2011)> =2011AZh....88..894V =2011ARep...55..824V
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI Abstract: We present the first estimates of the relative and absolute parameters of the eclipsing binary EQ Boo based on a light-curve analysis (P=5.43d, V=8.8m). This star is simultaneously Component A of the visual binary ADS 9422 (spectral types F7V + G0V; separation of the components 1.3"; magnitude difference 0.7m). The derived disagreement between the components' physical parameters and the assumption that they have the same age can be removed if there is a fourth, late-type star in the system. This is also able to explain the observed anomaly in the behavior of the O-C residuals at times of minima. Description: We observed the star on 11 nights in 2007-2010 at the Zvenigorod Observatory of the Institute of Astronomy (Russian Academy of Sciences) near Moscow (a Zeiss-600 telescope with a UBV photometer designed by Volkov, with an EMI-9789 photomultiplier); at the Crimean Astrophysical Observatory at Mt. Koshka (Crimea, Ukraine; a Zeiss- 600 telescope and a UBVRI photometer with an Ap-47p CCD chip or a Zeiss-600 telescope and a UBV RI photometer with a VersArray 512UV CCD chip); and at the Stara Lesna Observatory of the Slovak Academy of Sciences (Slovakia; a Zeiss-600 telescope and a UBVR photometer with a Hamamatsu R 2949S photomultiplier). We studied the instrumental photometric systems of all these instruments, which were all found to be close to the standard Johnson UBVRI system, and reduced all our measurements to this system. Objects: --------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------- 14 52 25.8 +17 57 23 EQ Boo = HD 131317 --------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 21 199 Individual observations in the U band tablea2.dat 21 232 Individual observations in the B band tablea3.dat 21 359 Individual observations in the V band tablea4.dat 21 185 Individual observations in the R band tablea5.dat 21 200 Individual observations in the I band
Byte-by-byte Description of file: tablea?.dat
Bytes Format Units Label Explanations
1- 13 F13.5 d HJD Heliocentric Julian date 15- 19 F5.3 mag mag Magnitude in band 21 A1 --- Band [UBVRI] Band
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Oct-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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