J/A+A/527/A136 HD 116956 V-band differential light curve (Lehtinen+, 2011)
The continuous period search method and its application to the young solar
analogue HD 116956.
Lehtinen J., Jetsu L., Hackman T., Kajatkari P., Henry G.W.
<Astron. Astrophys. 527, A136 (2011)>
=2011A&A...527A.136L 2011A&A...527A.136L
ADC_Keywords: Stars, variable
Keywords: methods: data analysis - stars: activity - starspots -
stars: individual: HD 116956 - stars: rotation
Abstract:
We formulate an improved time series analysis method for the analysis
of photometry of active stars. This new continuous period search (CPS)
method is applied to 12 years of V band photometry of the young solar
analogue HD 116956 (NQ UMa).
Description:
The included files present the numerical data of our CPS analysis of
the young solar analogue HD 116956 photometry. The data consists of
differential Johnson V-band photometry using the star HD 114446 as the
comparison star.
The CPS method is described in detail in our present paper. For a
thorough description of the formatting of the numerical results
provided by the CPS, see the appendix A of our paper.
Objects:
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RA (2000) DE Designation(s)
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13 25 45.5 +56 58 14 HD 116956 = V* NQ UMa
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hd116956.dat 19 1408 Differential photometry of HD 116956
results.dat 176 694 *Numerical results of the CPS analysis
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Note on results.dat: Continuous Period Search: each line consists of
numerical results for one single dataset.
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Byte-by-byte Description of file: hd116956.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliodentric Julian Date
15- 19 F5.3 mag DVmag Differential V-band photometry
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Byte-by-byte Description of file: results.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- SEG [1/12] Segment number
5- 14 F10.4 d t0 1st timepoint in SEG (1)
16- 17 I2 --- SET [1/89] Dataset number
19- 28 F10.4 d t1 1st timepoint in SET (1)
30- 39 F10.4 d tn Last timepoint in SET (1)
41- 50 F10.4 d tau Mean epoch of SET τ (1)
52 I1 --- IND [0/1] Independency of SET: 1=independent
54- 55 I2 --- n [10/32] Number of observations in SET
57- 62 F6.4 mag my [0.23/0.27] Mean of observations in SET
64- 69 F6.4 mag s_my [0.004/0.024] Stdev of observations in SET
71 I1 --- K [1/2] Light curve modelling order
73- 78 F6.4 mag se [0.0009/0.0121] Stdev of residuals
80- 87 F8.4 d TC [-2/141]?=-1 Timescale of change (2)
89- 94 F6.4 mag M [0.23/0.27] Light curve mean
96-101 F6.4 mag e_M [0.0003/0.0035] Error of M
103 I1 --- q_M [0/1] Reliability of M (1=unreliable)
105-110 F6.4 d Per [6.43/9.22] Period of light curve
112-117 F6.4 d e_Per [0.01/0.88] Error of Per
119 I1 --- q_Per [0/1] Reliability of Per (1=unreliable)
121-126 F6.4 mag Amp [0.010/0.077] Light curve amplitude
128-133 F6.4 mag e_Amp [0.0009/0.011] Error of Amp
135 I1 --- q_Amp [0/1] Reliability of Amp (1=unreliable)
137-146 F10.4 d tmin1 Epoch of the primary minimum (1)
148-153 F6.4 d e_tmin1 Error of tmin1
155 I1 --- q_tmin1 [0/1] Reliability of tmin1 (1=unreliable)
157-166 F10.4 d tmin2 ?=-1 Epoch of the secondary minimum (1)
168-174 F7.4 d e_tmin2 ?=-1 Error of tmin2
176 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): The special value TC=-2 indicates that the computation process
hits the end of the segment.
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Acknowledgements:
Jyri Lehtinen, jyri.j.lehtinen(at)helsinki.fi
(End) Patricia Vannier [CDS] 20-Dec-2010