J/A+A/542/A38 LQ Hya V-band differential light curve (Lehtinen+, 2012) ================================================================================ Spot activity of LQ Hya from photometry between 1988 and 2011. Lehtinen J., Jetsu L., Hackman T., Kajatkari P., Henry G.W. =2012A&A...542A..38L ================================================================================ ADC_Keywords: Stars, variable Keywords: stars: activity - starspots - stars: individual: LQ Hya Abstract: We perform detailed time series analysis for V-band photometry of the young active star LQ Hya 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 LQ Hya photometry. The data consists of differential Johnson V-band photometry using the star HD 82477 as the comparison star. The analysis has been performed using our previously published continuous period search (CPS) method, described in detail in Lehtinen et al., 2011. Cat. J/A+A/527/A136. Objects: ------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------- 09 32 25.57 -11 11 04.7 V* LQ Hya = HD 82558 ------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file lqhya.dat 19 2675 Differential photometry of LQ Hya results.dat 185 1079 *Numerical results of the CPS analysis -------------------------------------------------------------------------------- Note on results.dat: Each line consists of numerical results for one single dataset. -------------------------------------------------------------------------------- See also: J/A+A/527/A136 : HD 116956 V-band differential light curve (Lehtinen+, 2011) Byte-by-byte Description of file: lqhya.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 F12.4 d HJD Heliodentric Julian Date 15- 19 F5.3 mag dVmag Differential V-band photometry -------------------------------------------------------------------------------- Byte-by-byte Description of file: results.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- SEG [1/26] Segment number 4- 13 F10.4 d t0 1st timepoint in SEG (1) 15- 16 I2 --- SET [1-93] 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 (0=non-independent) 53- 54 I2 --- n Number of observations in SET 56- 62 F7.4 mag my Mean of observations in SET 64- 70 F7.4 mag e_my Stdev of observations in SET 72 I1 --- K [0/2] Light curve modelling order 74- 80 F7.4 mag se Stdev of residuals 82- 89 F8.4 d TC Timescale of change 91- 97 F7.4 mag M ?=-1 Light curve mean 99-105 F7.4 mag e_M ?=-1 Error of M 107 I1 --- q_M [0/1] Reliability of M (1=unreliable) 109-115 F7.4 d Per ?=-1 Period of light curve 117-123 F7.4 d e_Per ?=-1 Error of Per 125 I1 --- q_Per [0/1] Reliability of Per (1=unreliable) 127-133 F7.4 mag Amp ?=-1 Light curve amplitude 135-141 F7.4 mag e_Amp ?=-1 Error of Amp 143 I1 --- q_Amp [0/1] Reliability of Amp (1=unreliable) 145-154 F10.4 d tmin1 ?=-1 Epoch of the primary minimum (1) 156-162 F7.4 d e_tmin1 ?=-1 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) -------------------------------------------------------------------------------- Note (1): All timepoints are Heliocentric Julian Dates given in HJD-2400000. -------------------------------------------------------------------------------- Acknowledgements: Jyri Lehtinen, jyri.j.lehtinen(at)helsinki.fi ================================================================================ (End) Patricia Vannier [CDS] 15-May-2012