J/A+A/278/449 Long-term photometry of FK Com (Jetsu+ 1993)
Spot and flare activity of FK Comae Berenices: long-term photometry
JETSU L., PELT J., TUOMINEN I.
<Astron. Astrophys. 278, 449 (1993)>
=1993A&A...278..449J 1993A&A...278..449J
Keywords: stars: individual: FK Comae - stars: activity - stars: variable -
stars: flares
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 119 41 Normalized photometry
table2 59 23 Photometric phases of FK Comae flares
table3 127 41 Mean brightness in UBVRI
table4 134 41 Amplitude of the rotational modulation of
brightness in UBVRI
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Byte-per-byte Description of file: table1
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Bytes Format Units Label Explanations
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3- 9 F7.2 yr Year Average observing time
17- 23 F7.5 d Pphot Photometric rotation period
32- 38 F7.5 d e_Pphot rms uncertainty on Pphot
44- 48 F5.3 --- Phi(min) Phase of the light minimum
54- 58 F5.3 --- e_Phi(min) rms uncertainty on Phi(min)
64- 73 F10.4 d t_min Heliocentric julian date of the light minimum
79- 83 F5.3 --- Phi(tmin) Photometric phase
88- 93 F6.3 --- Phi(coh) Coherence length
99-104 F6.4 --- e_Phi(coh) rms uncertainty on Phi(coh)
109-110 I2 --- SET Division into subset of the observing time
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Notes to table1:
The photometric rotation period Pphot and the phase of the light minimum
Phi(min) were derived for the subsets with at least 8 and 7 nights of
non-flare observations, respectively.
The heliocentric julian date of the light minimum t_min was derived for the
photometric rotation period and its photometric phase Phi(t_min) from Eq. 1.
The coherence length Phi(coh) was solved from Eq. 4
Byte-per-byte Description of file: table2
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Bytes Format Units Label Explanations
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3- 12 F10.4 d HJD_flare Average time
18- 23 F6.3 --- Phi(flare) Photometric phase
28- 33 F6.3 --- Delta Phase difference (Phi(flare) - Phi(min))
between the flare and the photometric minimum
of the subset
39- 40 I2 --- SET Division into subsets of the observing time
48- 53 A6 --- F Category of the flare detection
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Byte-per-byte Description of file: table3
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Bytes Format Units Label Explanations
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2- 8 F7.2 yr YEAR Average observing time
14- 18 F5.3 mag M(U) Mean brightness in U filter
24- 28 F5.3 mag e_M(U) rms uncertainty on M(U)
34- 38 F5.3 mag M(B) Mean brightness in B filter
44- 48 F5.3 mag e_M(B) rms uncertainty on M(B)
61- 65 F5.3 mag M(V) Mean brightness in V filter
71- 75 F5.3 mag e_M(V) rms uncertainty on M(V)
81- 85 F5.3 mag M(R) Mean brightness in R filter
91- 95 F5.3 mag e_M(R) rms uncertainty on M(R)
101-105 F5.3 mag M(I) Mean brightness in I filter
111-115 F5.3 mag e_M(I) rms uncertainty on M(I)
122-123 I2 --- SET Division into subsets of the observing time
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Byte-per-byte Description of file: table4
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Bytes Format Units Label Explanations
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3- 9 F7.2 yr YEAR Average observing time
18- 22 F5.3 --- A(U) Amplitude of the rotational modulation of
brightness in U filter
28- 32 F5.3 --- e_A(U) rms uncertainty on A(U)
38- 42 F5.3 --- A(B) Amplitude of the rotational modulation of
brightness in B filter
48- 52 F5.3 --- e_A(B) rms uncertainty on A(B)
58- 62 F5.3 --- A(V) Amplitude of the rotational modulation of
brightness in V filter
68- 72 F5.3 --- e_A(V) rms uncertainty on A(V)
86- 90 F5.3 --- A(R) Amplitude of the rotational modulation of
brightness in R filter
96-100 F5.3 --- e_A(R) rms uncertainty on A(R)
106-110 F5.3 --- A(I) Amplitude of the rotational modulation of
brightness in I filter
116-120 F5.3 --- e_A(I) rms uncertainty on A(I)
128-129 I2 --- SET Division into subset of observing time
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(End) Patricia Bauer [CDS] 28-Oct-1993