J/AN/338/453 BM CVn V-band differential light curve (Siltala+, 2017)
Time-series analysis of long-term photometry of BM Canum Venaticorum.
Siltala J., Jetsu L., Hackman T., Henry G.W., Immonen L.,
Kajatkari P., Lankinen J., Lehtinen J., Monira S., Nikbakhsh S.,
Viitanen A., Viuho J., Willamo T.
<Astron. Nachrichten 338, 453-463 (2017)>
=2017AN....338..453S 2017AN....338..453S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable
Keywords: methods: data analysis - stars: activity - stars: binaries -
stars: starspots - stars: individual (BM CVn)
Abstract:
We perform detailed time series analysis for V-band photometry of BM
CVn to investigate the characteristics of its magnetic activity in
both long and short time scale and also to estimate its differential
rotation.
Description:
The included files present the numerical data of our analysis of the
BM CVn photometry. The data consists of differential Johnson V-band
photometry using the star HD 116010 as the comparison star.
The analysis has been performed using the previously published
continuous period search (CPS) method, described in detail in Lehtinen
et al., 2011A&A...527A.136L 2011A&A...527A.136L, Cat. J/A+A/527/A136.
Objects:
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RA (2000) DE Designation(s)
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13 21 32.26 +38 52 49.5 V* BM CVn = HD 116204
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
phot.dat 19 2930 Differential photometry of BM CVn
phot_mlc.dat 19 2930 Differential photometry of BM CVn with MLC removed
res.dat 185 1319 *Numerical results of the CPS analysis
res_mlc.dat 185 1319 *Results of the CPS analysis with MLC removed
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Note on res.dat res_mlc.dat: Each line consists of numerical results for one
single dataset.
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See also:
J/A+A/527/A136 : HD 116956 V-band differential light curve (Lehtinen+, 2011)
Byte-by-byte Description of file: phot.dat phot_mlc.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
15- 19 F5.3 mag DVmag Differential V-band photometry
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Byte-by-byte Description of file: res.dat res_mlc.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- SEG [1/26] Segment number
4- 13 F10.4 d t0 1st timepoint in SEG (1)
15- 16 I2 --- SET [1/95] Dataset number
18- 27 F10.4 d t1 1st timepoint in SET (1)
29- 38 F10.4 d tn Last timepoint in SET (1)
40- 49 F10.4 d tau Mean epoch of SET (1)
51 I1 --- IND [0/1] Independency of SET (2)
53- 54 I2 --- n [1/42] Number of observations in SET
56- 62 F7.4 mag my Mean of observations in SET
64- 70 F7.4 mag s_my Stdev of observations in SET
72 I1 --- K Light curve modelling order
74- 80 F7.4 mag se Stdev of residuals
82- 89 F8.4 d TC [-2/134]?=-1 Timescale of change (3)
91- 97 F7.4 mag M Light curve mean
99-105 F7.4 mag e_M Error of M
107 I1 --- q_M [0/1] Reliability of M (1=unreliable)
109-115 F7.4 d Per Period of light curve
117-123 F7.4 d e_Per Error of P
125 I1 --- q_Per [0/1] Reliability of P (1=unreliable)
127-133 F7.4 mag Amp Light curve amplitude
135-141 F7.4 mag e_Amp Error of A
143 I1 --- q_Amp [0/1] Reliability of A (1=unreliable)
145-154 F10.4 d tmin1 Epoch of the primary minimum (1)
156-162 F7.4 d e_tmin1 Error of tmin1
164 I1 --- q_tmin1 [0/1] Reliability of tmin1 (1=unreliable)
166-175 F10.4 d tmin2 ?=-1 Epoch of the secondary minimum (1)
177-183 F7.4 d e_tmin2 ?=-1 Error of tmin2
185 I1 --- q_tmin2 [0/1] Reliability of tmin2 (1=unreliable)
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Note (1): All timepoints are Heliocentric Julian Dates given in format
HJD-2400000.
Note (2): Independency of SET flag as follows:
0 = Unindependent SET
1 = Independent SET
Note (3): The special value TC=-2 indicates that the computation process
hits the end of the segment.
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Acknowledgements:
Lauri Siltala, lauri.siltala(at)helsinki.fi
(End) Patricia Vannier [CDS] 22-May-2017