J/A+A/476/881 Differential photometry of FK Com (Korhonen+, 2007)
Study of FK Comae Berenices.
V. Spot evolution and detection of surface differential rotation.
Korhonen H., Berdyugina S.V., Hackman T., Ilyin I.V., Strassmeier K.G.,
Tuominen I.
<Astron. Astrophys. 476, 881 (2007)>
=2007A&A...476..881K 2007A&A...476..881K
ADC_Keywords: Stars, variable ; Photometry, UBV ; Photometry, uvby
Keywords: stars: activity - stars: late-type - stars: starspots -
stars: individual: FK Comae Berenices
Abstract:
In the present work we publish new photometric observations of the
very active single giant, FK Com for the time period between the 1st
of January 2002 and the 8th of July 2004. The observations have been
carried out with three different automatic photometric telescopes:
Phoenix 10, Wolfgang and Amadeus, all located in Arizona, USA.
Observations contain measurements at the following bands: Johnson U, B
and V, Cousins I and Stroemgren b and y. The observations are
differential photometry in respect to the primary comparison star
HD 117567.
Objects:
-------------------------------------------------
RA (2000) DE Designation(s)
-------------------------------------------------
13 30 46.8 +24 13 58 FK Com = HD 117555
13 30 52.2 +24 14 15 HD 117567 = HIP 65921
-------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2a.dat 39 532 Johnson U, B an V photometry from Phoenix 10
table2b.dat 49 559 Johnson V and Cousins Ic photometry from Amadeus
table2c.dat 49 119 Stroemgren b and y photometry from Wolfgang
--------------------------------------------------------------------------------
See also:
J/A+A/278/449 : Long-term photometry of FK Com (Jetsu+ 1993)
J/A+AS/103/183 : UVBRI photometry of FK Com (Jetsu+ 1994)
J/A+A/282/L9 : "flip-flop" in FK Com (Jetsu+ 1994)
J/A+A/467/229 : UBV photometry of FK Com and HD 199178 (Panov+, 2007)
J/A+A/374/1049 : Photometry of FK Com for 1993-2001 (Korhonen+, 2001)
J/A+A/390/179 : Study of FK Comae Berenices. IV. (Korhonen+ 2002)
Byte-by-byte Description of file: table2a.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.4 d HJD Heliocentric Julian Date
13- 21 F9.4 mag dUmag ?=99.0000 Differential Johnson U magnitude (G1)
22- 30 F9.4 mag dBmag ?=99.0000 Differential Johnson B magnitude (G1)
31- 39 F9.4 mag dVmag ?=99.0000 Differential Johnson V magnitude (G1)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2b.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d HJD Heliocentric Julian Date
14- 22 F9.5 mag dVmag ?=99.00000 Differential Johnson V magnitude (G1)
23- 31 F9.5 mag e_dVmag ?=99.00000 Error of the differential V magnitude
32- 40 F9.5 mag dIcmag ?=99.00000 Differential Cousins Ic magnitude (G1)
41- 49 F9.5 mag e_dIcmag ?=99.00000 Error of the differential Ic magnitude
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2c.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d HJD Heliocentric Julian Date
14- 22 F9.5 mag dbmag ?=99.00000 Differential Stroemgren b magnitude (G1)
23- 31 F9.5 mag e_dbmag ?=99.00000 Error of the differential b magnitude
32- 40 F9.5 mag dymag ?=99.00000 Differential Stroemgren y magnitude (G1)
41- 49 F9.5 mag e_dymag ?=99.00000 Error of the differential y magnitude
--------------------------------------------------------------------------------
Global notes:
Note (G1): Differential photometry FK Com - HD 117567
--------------------------------------------------------------------------------
Acknowledgements: Heidi Korhonen, hkorhone(at)eso.org
References:
Korhonen et al., Paper I 1999A&A...346..101K 1999A&A...346..101K
Korhonen et al., Paper II 2000A&A...360.1067K 2000A&A...360.1067K
Korhonen et al., Paper III 2001A&A...374.1049K 2001A&A...374.1049K, Cat. J/A+A/374/1049
Korhonen et al., Paper IV 2002A&A...390..179K 2002A&A...390..179K, Cat. J/A+A/390/179
(End) Heidi Korhonen [AIP, Potsdam, Germany], Patricia Vannier [CDS] 01-Oct-2007