J/A+A/588/A38 Light curves of spotted solar-type stars (Lehtinen+, 2016)
Activity trends in young solar-type stars.
Lehtinen J., Jetsu L., Hackman T., Kajatkari P., Henry G.W.
<Astron. Astrophys. 588, A38 (2016)>
=2016A&A...588A..38L 2016A&A...588A..38L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry
Keywords: stars: solar-type - stars: activity - stars: rotation - starspots
Abstract:
We perform detailed time series analysis for B- and V-band photometry
of 21 young and active solar-type stars to study their spot
structures, activity cycles, and differential rotation.
Description:
For each star there are two files; a file containing the differential
B- and V-band photometry and a file containing the numerical results
of the light curve analysis. 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).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 60 21 List of studied stars
obs/* . 21 Individual files of differential photometry
num/* . 21 Individual files of numerical results
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See also:
J/A+A/527/A136 : HD 116956 V-band differential light curve (Lehtinen+, 2011)
J/A+A/577/A84 : V352 CMa V-band differential light curve (Kajatkari+, 2015)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star Star name
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 22 F4.1 s RAS Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 34 F4.1 arcsec DEs Declination (J2000)
36- 47 A12 --- ResFile Name of the table with numerical results
in subdirectory num
49- 60 A12 --- PhotFile Name of the table with differential photometry
in subdirectory obs
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Byte-by-byte Description of file: obs/*
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliodentric Julian Date
14- 19 F6.3 mag DBmag ? Differential B-band photometry
21- 26 F6.3 mag DVmag ? Differential V-band photometry
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Byte-by-byte Description of file: num/*
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Bytes Format Units Label Explanations
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1- 12 F12.4 d t1 1st timepoint in dataset
13- 26 F14.4 d tn Last timepoint in dataset
27- 40 F14.4 d tau Mean epoch of dataset
41- 44 I4 --- n Number of observations in dataset
45- 52 F8.4 mag my Mean of observations in dataset
53- 60 F8.4 mag s_y Standard deviation of observations in dataset
61- 63 I3 --- K Light curve modelling order
64- 71 F8.4 mag s_e Standard deviation of residuals
72- 80 F9.4 d TC ? Timescale of change
81- 88 F8.4 mag M Light curve mean
89- 96 F8.4 mag e_M Error of M
97-104 F8.4 d Per ? Period of light curve
105-112 F8.4 d e_Per ? Error of Per
113-120 F8.4 mag Amp ? Light curve amplitude
121-128 F8.4 mag e_Amp ? Error od Amp
129-142 F14.4 d tm1 ? Epoch of the primary minimum
143-150 F8.4 d e_tm1 ? Error of tm1
151-164 F14.4 d tm2 ? Epoch of the secondary minimum
165-172 F8.4 d e_tm2 ? Error of tm2
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Acknowledgements:
Jyri Lehtinen, jyri.j.lehtinen(at)helsinki.fi
(End) Patricia Vannier [CDS] 28-Dec-2015