J/A+A/390/179 Study of FK Comae Berenices. IV. (Korhonen+ 2002)
Study of FK Comae Berenices.
IV. Active longitudes and the "flip-flop" phenomenon
Korhonen H., Berdyugina S.V., Tuominen I.
<Astron. Astrophys. 390, 179 (2002)>
=2002A&A...390..179K 2002A&A...390..179K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, late-type ; Photometry, UBV
Keywords: stars: individual: FK Com - stars: late-type - stars: starspots -
stars: activity
Description:
Doppler imaging techniques have earlier been used to study the
starspots and their evolution over a four year period in a single,
late-type star FK Com. In the present work we publish new photometric
observations of FK Com for the year 2001 and analyse them together
with the previously published photometry obtained since 1966.
The observations for 2001 have been carried out at the Phoenix 10
automatic photometric telescope in Arizona, USA. Observations contain
measurements at the Johnson U, B and V bands. The observations are
differential photometry in respect to the primary comparison star HD
117567. In table1, 99.000 means that no observations were available at
that time at that band or that the error in the magnitude was larger
than 0.02.
Objects:
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RA (2000) DE Designation(s)
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13 30 46.8 +24 13 58 FK Com = HD 117555
13 30 52.21 +24 14 15 HD 117567
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 189 Data from Phoenix 10
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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- 12 F12.4 d HJD Heliocentric Julian Date
15- 20 F6.3 mag Umag ?=99.000 U differential magnitude, FK Com - HD 11756
23- 28 F6.3 mag Bmag ?=99.000 B differential magnitude, FK Com - HD 11756
31- 36 F6.3 mag Vmag ?=99.000 V differential magnitude, FK Com - HD 11756
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Acknowledgements: Heidi Korhonen
(End) Heidi Korhonen [Univ. Oulu], Patricia Bauer [CDS] 15-Jul-2002