J/AN/323/31 UBVR light curves of ER Vul and RT And (Ekmekci+, 2002)
Chromospherically active binary systems, RT And and ER Vul:
1995-1998 observations and spot distributions.
Ekmekci F., Oezeren F.F., Ak H.
<Astron. Nachrichten, 323, 31 (2002)>
=2002AN....323...31E 2002AN....323...31E
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binaries: eclipsing: stars: individual (RT And, ER Vul) ; Stars: spot
Abstract:
We present the light curves of chromospherically active binary
systems, RT And and ER Vul, obtained during 1995-1998 in BV/UBVR
filters at the Ankara University Observatory and the TUBITAK National
Observatory. In addition, the spot distributions for these systems are
investigated by using the Wilson-Devinney program. Outside of the
eclipses, the light curve variations are attributed to large cool
spots located on one of components of the systems. While three spots
were located on the primary component in the case of RT And, the
location of three spots were considered on the secondary star in the
case of ER Vul. From the spot motions in longitudes between 1995 and
1998, it was inferred that the migration period of the distortion wave
has at value of 6.6 years for RT And.
Objects:
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RA (2000) DE Designation(s)
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23 11 10.1 +53 01 33 RT And = BD+52 3383a
21 02 25.9 +27 48 26 ER Vul = HD 200391
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 26 3937 RT And UBVR data
table5.dat 26 1511 ER Vul BV data
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Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1 A1 --- Band [UBVR] Band
3- 15 F13.5 d HJD Observation Heliocentric date
17- 20 I4 yr Obs.Y Besselian year of observation
22- 26 F5.3 --- I/Imax Relative intensity in color Band
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Acknowledgements: Hasan AK
(End) Patricia Bauer [CDS] 18-Apr-2002