ζ Tau : une étoile Be changeante

English version


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Objectifs et modélisation :

Résultats :


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JOURNAL D'OBSERVATIONS :


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Observation du 08.893/03/2015 :

08.893/03/2015
zet_tau_20150308_8931.fit
# JD=2457090.3931.
# EW(60.00=6535.00-6595.00)=-9.096 A.
# sigma(EW)=0.291 A.
# SNR=162.
# He6678: Vrad=13.3926 +/- 1.2913 km/s.


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Observation du 21.854/01/2014 :

21.854/01/2014
zet_tau_20140121_854.fit
# JD=2456679.3536.
# EW(60.00=6535.00-6595.00)=-7.269 A.
# sigma(EW)=0.349 A.
# SNR= 133.
# He6678: Vrad=16.3306 +/- 1.2926 km/s.

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Observation du 16.849/12/2013 :

16.849/12/2013
zet_tau_20131216_849.fit
# JD=2456643.3493.
# EW(60.00=6535.00-6595.00)=-6.861 A.
# sigma(EW)=0.270 A.
# SNR= 170.
# He6678: Vrad=14.442 +/- 1.2926 km/s.

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Observation du 12.031/11/2013 :

12.031/11/2013
zet_tau_20131112_031.fit
# JD=2456608.5304999999.
# EW(60.0=6535.0-6595.0)=-6.79 A.
# sigma(EW)=0.25 A.
# SNR=184.
# He6678: Vrad=29.925700000000003 +/- 1.29 km/s.

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Observation du 21.926/03/2013 :

21.926/03/2013
zet_tau_20130321_926.fit
# JD=2456373.4264.
# EW(60.0=6535.0-6595.0)=-3.73 A.
# sigma(EW)=0.33 A.
# SNR=136.
# He6678: Vrad=6.8428 +/- 1.2906 km/s.

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Observation du 02.791/03/2013 :

02.791/03/2013
zet_tau_20130302_791.fit
# JD=2456354.2912.
# EW(60.0=6535.0-6595.0)=-3.86 A.
# sigma(EW)=0.27 A.
# SNR=163.
# He6678: Vrad=22.0732 +/- 1.2905 km/s.

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Observation du 19.811/02/2013 :

19.811/02/2013
zet_tau_20130219_811.fit
# JD=2456343.311.
# EW(60.0=6535.0-6595.0)=-3.22 A.
# sigma(EW)=0.16 A.
# SNR=273.
# He6678: Vrad=20.6125 +/- 1.2911 km/s.

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Observation du 03.800/01/2013 :

03.800/01/2013
zet_tau_20130103_800.fit
# JD=2456296.3.
# EW(60.0=6535.0-6595.0)=-2.45 A.
# sigma(EW)=0.16 A.
# SNR=275.
# He6678: Vrad=28.0008 +/- 1.2902 km/s.

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Observation du 08.965/04/2011 :

08.965/04/2011
zet_tau_20110408_965.fit
# JD=2455660.4653.
# EW(60.0=6535.0-6595.0)=-7.72 A.
# sigma(EW)=1.49 A.
# SNR=62.
# He6678: Vrad=34.8751 +/- 1.291 km/s.

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Observation du 22.820/03/2011 :

22.820/03/2011
zet_tau_20110322_820.fit
# JD=2455643.3197.
# EW(60.0=6535.0-6595.0)=-11.23 A.
# sigma(EW)=0.4 A.
# SNR=244.
# He6678: Vrad=22.6308 +/- 1.2924 km/s.

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Observation du 20.965/03/2011 :

20.965/03/2011
zet_tau_20110320_965.fit
# JD=2455641.4654.
# EW(60.0=6535.0-6595.0)=-7.85 A.
# sigma(EW)=0.55 A.
# SNR=170.
# He6678: Vrad=24.2371 +/- 1.2923 km/s.

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Observation du 09.833/03/2011 :

09.833/03/2011
zet_tau_20110309_833.fit
# JD=2455630.3332.
# EW(60.0=6535.0-6595.0)=-8.8 A.
# sigma(EW)=0.3 A.
# SNR=310.
# He6678: Vrad=14.3734732459 +- 1.28995180534 km/s.

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Observation du 06.847/03/2011 :

06.847/03/2011
zet_tau_20110306_847.fit
# JD=2455627.3465.
# EW(60.0=6535.0-6595.0)=-10.38 A.
# sigma(EW)=0.29 A.
# SNR=327.
# He6678: Vrad=6.4810703588 +- 1.2899202926 km/s.

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Observation du 21.027/02/2011 :

21.027/02/2011
zet_tau_20110221_027.fit
# JD=2455613.5271.
# EW(60.0=6535.0-6595.0)=-9.69 A
# sigma(EW)=0.38 A.
# SNR=251.
# He6678: Vrad=-4.112383582 +- 1.28924216221 km/s.

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Observation du 18.892/02/2011 :

18.892/02/2011
zet_tau_20110218_892.fit
# JD=2455611.3923.
# EW(60.0=6535.0-6595.0)=-10.6 A
# sigma(EW)=0.29 A.
# SNR=336.
# He6678: Vrad=2.2821136501 +- 1.28884883921 km/s.

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Observation du 05.793/02/2011 :

05.793/02/2011
zet_tau_20110205_793.fit
# JD=2455598.2932.
# EW(60.0=6535.0-6595.0)=-10.09 A
# sigma(EW)=0.32 A.
# SNR=298.
# He6678: Vrad=-0.0108488201 +- 1.28584510764 km/s.

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Observation du 03.819/02/2011 :

03.819/02/2011
zet_tau_20110203_819.fit
# JD=2455596.3194.
# EW(60.0=6535.0-6595.0)=-11.17 A.
# sigma(EW)=0.28 A.
# SNR=350.
# He6678: Vrad=7.1042619586 +- 1.28889287333 km/s.

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Observation du 19.812/01/2011 :

19.812/01/2011
zet_tau_20110119_812.fit
# JD=2455581.3118.
# EW(60.0=6535.0-6595.0)=-10.47 A.
# sigma(EW)=0.28 A.
# SNR=348.
# He6678: Vrad=13.5175735125 +- 1.2883824659 km/s.

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Observation du 01.902/01/2011 :

01.902/01/2011
zet_tau_20110101_902.fit
# JD=2455563.4019.
# EW(60.0=6535.0-6595.0)=-9.16 A.
# sigma(EW)=0.26 A.
# SNR=370.
# He6678: Vrad=9.0388447976 +- 1.29169112045 km/s.

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Observation du 03.983/12/2010 :

03.983/12/2010
zet_tau_20101203_983.fit
# JD=2455534.4828.
# EW(60.0=6535.0-6595.0)=-10.07 A.
# sigma(EW)=0.41 A.
# SNR=233.
# He6678: Vrad=29.5098160599 +- 1.29230007225 km/s.

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Observation du 10.977/11/2010 :

10.977/11/2010
zet_tau_20101110_977.fit
# JD=2455511.4767.
# EW(60.0=6535.0-6595.0)=-10.38 A.
# sigma(EW)=0.49 A.
# SNR=196.
# He6678: Vrad=16.4499146502 +- 1.28862893647 km/s.

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Observation du 12.200/08/2010 :

12.200/08/2010
zet_tau_20100812_200.fit
# JD=2455420.7.
# EW(60.0=6535.0-6595.0)=-11.31 A.
# sigma(EW)=0.53 A.
# SNR=183.
# He6678: Vrad=14.7630527702 +- 1.29117187872 km/s.

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Observation du 28.850/04/2010 :

28.850/04/2010
zet_tau_20100428.fit
# JD=2455315.3495.
# EW(60.0=6535.0-6595.0)=-12.25 A.
# sigma(EW)=1.06 A.
# SNR=93.
# He6678: Vrad=14.530095123380601 +- 1.2892891795236996 km/s.

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Observation du 14.872/04/2010 :

14.872/04/2010
zet_tau_20100414.fit
# JD=2455301.3715.
# EW(60.0=6535.0-6595.0)=-12.85 A.
# sigma(EW)=0.49 A.
# SNR=199.
# He6678: Vrad=7.344525398266985 +- 1.2878573601933936 km/s.

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Observation du 04.899/04/2010 :

04.899/04/2010
zet_tau_20100404.fit
# JD=2455291.3987.
# EW(60.0=6535.0-6595.0)=-13.49 A.
# sigma(EW)=0.47000000000000003 A.
# SNR=209.
# He6678: Vrad=14.673113697870473 +- 1.2887327475427233 km/s.

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Observation du 23.878/03/2010 :

23.878/03/2010
zet_tau_20100323.fit
# JD=2455279.3783.
# EW(60.0=6535.0-6595.0)=-12.76 A.
# sigma(EW)=0.38 A.
# SNR=255.
# He6678: Vrad=18.02976685753646 +- 1.2893929050034272 km/s.

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Observation du 15.861/03/2010 :

15.861/03/2010
zet_tau_20100315.fit
# JD=2455271.3605.
# EW(60.0=6535.0-6595.0)=-13.290000000000001 A.
# sigma(EW)=0.34 A.
# SNR=288.
# He6678: Vrad=25.530062367271885 +- 1.289506116140554 km/s.

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Observation du 13.851/03/2010 :

13.851/03/2010
zet_tau_20100313.fit
# JD=2455269.3511.
# EW(60.0=6535.0-6595.0)=-13.22 A.
# sigma(EW)=0.26 A.
# SNR=377.
# He6678: Vrad=24.004320857004565 +- 1.292685002863354 km/s.

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Observation du 06.940/03/2010 :

06.940/03/2010
zet_tau_20100306.fit
# JD=2455262.4402.
# EW(60.0=6535.0-6595.0)=-13.76 A.
# sigma(EW)=0.34 A.
# SNR=289.
# He6678: Vrad=26.644912685851736 +- 1.2874882440094124 km/s.

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Observation du 05.917/03/2010 :

05.917/03/2010
zet_tau_20100305.fit
# JD=2455261.4167.
# EW(60.0=6535.0-6595.0)=-13.48 A.
# sigma(EW)=0.3 A.
# SNR=335.
# He6678: Vrad=14.946514856210854 +- 1.2855284983104436 km/s.

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Observation du 24.818/02/2010 :

24.818/02/2010
zet_tau_20100224.fit
# JD=2455252.3184.
# EW(60.0=6535.0-6595.0)=-14.01 A.
# sigma(EW)=0.55 A.
# SNR=182.
# He6678: Vrad=18.154284845676678 +- 1.2881347180950085 km/s

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Observation du 20.930/02/2010 :

20.930/02/2010
zet_tau_20100220.fit
# JD=2455248.4296.
# EW(60.0=6535.0-6595.0)=-14.17 A.
# sigma(EW)=0.28 A.
# SNR=358.
# He6678: Vrad=6.7840675964871835 +- 1.286639889661123 km/s

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Observation du 12.834/02/2010 :

12.834/02/2010
zet_tau_20100212.fit
# JD=2455240.3339.
# EW(60.0=6535.0-6595.0)=-14.38 A.
# sigma(EW)=0.54 A.
# SNR=185.
# He6678: Vrad=13.376634284032761 +- 1.2852926448165207 km/s.

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Observation du 07.918/02/2010 :

07.918/02/2010
zet_tau_20100207.fit
# JD=2455235.4178.
# EW(60.0=6535.0-6595.0)=-14.42 A.
# sigma(EW)=0.39 A.
# SNR=254.
# He6678: Vrad=9.756622437452947 +- 1.2876953361714498 km/s.

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Observation du 05.851/02/2010 :

05.851/02/2010
zet_tau_20100205.fit
# JD=2455233.3505.
# EW(60.0=6535.0-6595.0)=-14.43 A.
# sigma(EW)=0.44 A.
# SNR=225.
# He6678: Vrad=13.648079136587342 +- 1.289680605153083 km/s.

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Observation du 03.781/02/2010 :

03.781/02/2010
zet_tau_20100203.fit
# JD=2455231.2813.
# EW(60.0=6535.0-6595.0)=-14.88 A.
# sigma(EW)=0.41000000000000003 A.
# SNR=245.
# He6678: Vrad=9.942279243233372 +- 1.288801024587901 km/s.

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Observation du 31.809/01/2010 :

31.809/01/2010
zet_tau_20100131.fit
# JD=2455228.3091.
# EW(60.0=6535.0-6595.0)=-15.08 A.
# sigma(EW)=0.32 A.
# SNR=314.
# He6678: Vrad=14.649087235386713 +- 1.2849740494685313 km/s.

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Observation du 21.877/01/2010 :

21.877/01/2010
zet_tau_20100121.fit
# JD=2455218.3768.
# EW(60.0=6535.0-6595.0)=-15.21 A.
# sigma(EW)=0.48 A.
# SNR=208.
# He6678: Vrad=3.381530237270926 +- 1.2848504260720812 km/s.

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Observation du 18.821/01/2010 :

18.821/01/2010
zet_tau_20100118.fit
# JD=2455215.321.
# EW(60.0=6535.0-6595.0)=-14.07 A.
# sigma(EW)=0.36 A.
# SNR=274.

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Observation du 10.868/01/2010 :

10.868/01/2010
zet_tau_20100110.fit
# JD=2455207.3682.
# EW(60.0=6535.0-6595.0)=-14.83 A.
# sigma(EW)=0.31 A.
# SNR=328.

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Observation du 06.854/01/2010 :

06.854/01/2010
zet_tau_20100106.fit
# JD=2455203.3544.
# EW(60.0=6535.0-6595.0)=-14.83 A.
# sigma(EW)=0.36 A.
# SNR=280.

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Observation du 21.909/12/2008 :

21.909/12/2008
zeta_tau_20081221.fit
# JD=2454822.4091.
# EW(60.0=6535.0-6595.0)=-13.41 A.
# sigma(EW)=0.78 A.
# SNR=127.

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Observation du 05.894/12/2008 :

05.894/12/2008
zeta_tau_20081205.fit
# JD=2454806.3943.
# EW(60.0=6535.0-6595.0)=-13.63 A.
# sigma(EW)=0.65 A.
# SNR=152.

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Observation du 23.033/11/2008 :

23.033/11/2008
zeta_tau_20081123.fit
# JD=2454793.5332.
# EW(60.0=6535.0-6595.0)=-13.69 A.
# sigma(EW)=0.81 A.
# SNR=123.

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Observation du 29.110/08/2008 :

29.110/08/2008
zeta_tau_20080829.fit
# JD=2454707.6095.
# EW(60.0=6535.0-6595.0)=-14.31 A.
# sigma(EW)=0.94 A.
# SNR=106.

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Observation du 06.860/04/2008 :

06.860/04/2008
zeta_tau_20080406.fit
# JD=2454563.3599.
# EW(60.0=6535.0-6595.0)=-15.18 A.
# sigma(EW)=0.94 A.
# SNR=107.

# Lambda_HeI=6679.58733754 A :
# Vrad=36.5154092946 +- 5.22573739959 km/s.


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Observation du 21.856/02/2008 :

21.856/02/2008
zeta_tau_20080221.fit
# JD: 2454518.35578.
# EW(60.0=6535.0-6595.0)=-14.49 A.
# Sigma(EW)=1.3 A.
# SNR=77.

# Lambda_HeI=6678.938787 A : 
# Vrad=35.230278268 +- 5.18124411701 km/s.


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Observation du 20.885/02/2008 :

20.885/02/2008
zeta_tau_20080220.fit
# JD: 2454517.38452
# EW(60.0=6535.0-6595.0)=-14.57 A.
# Sigma(EW)=0.99 A.
# SNR=101.
 
# Lambda_HeI=6679.54564537 A :
# Vrad=35.1698895726 +- 5.24008781039 km/s.


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Observation du 18.758/02/2008 :

18.758/02/2008
zeta_tau_20080218.fit
# JD: 2454515.25836
# EW(60.0=6535.0-6595.0)=-15.33 A.
# Sigma(EW)=1.64 A.
# SNR=61.

# Lambda_HeI=6679.3858177 A :
# Vrad=28.435504147 +- 5.24022742177 km/s.


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Observation du 15.963/02/2008 :

15.963/02/2008
zeta_tau_20080215.fit
# JD: 2454512.46259
# EW(60.0=6535.0-6595.0)=-15.38 A.
# Sigma(EW)=1.87 A.
# SNR=54.

# Lambda_HeI=6679.43903066 A :
# Vrad=31.5469515991 +- 5.23461418623 km/s.


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Observation du 12.819/02/2008 :

12.819/02/2008
zeta_tau_20080212.fit
# JD: 2454509.31918
# EW(60.0=6535.0-6595.0)=-14.44 A.
# Sigma(EW)=1.37 A.
# SNR=73.

# Lambda_HeI=6679.32451449 A :
# Vrad=27.2055151065 +- 5.23834612553 km/s.


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Observation du 09.727/02/2008 :

09.727/02/2008
zeta_tau_20080209.fit
# JD: 2454506.22682
# EW(60.0=6535.0-6595.0)=-13.45 A.
# Sigma(EW)=1.07 A.
# SNR=93.

# Lambda_HeI=6679.03840609 A :
# Vrad=39.7023302534 +- 10.0 km/s.



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Observation du 20.908/04/2007 :

20.908/04/2007
zeta_tau_2007420.fit
# EW(22.04=6552.73-6574.77)=-17.75 A
# sigma(EW)=1.24 A
# SNR=40

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Observation du 19.936/04/2007 :

19.936/04/2007
zeta_tau_2007419.fit
# EW(22.06=6552.63-6574.69)=-18.95 A
# SNR=40
# Sigma(EW)=1.27 A

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Observation du 17.900/03/2007 :

17.900/03/2007
zeta_tau_2007317.fit
# EW(26.18=6548.73-6574.91)=-21.97 anstrom(s)
# SNR=54
# Sigma(EW)=1.11 angstrom

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Observation du 10.854/03/2007 :

10.854/03/2007
zeta_tau_2007310.fit
# EW(31.03=6543.74-6574.77)=-21.55 A
# sigma(EW)=1.6 A
# SNR=42

# EW(42.67=6543.74-6586.41)=-24.0 A
# SNR=65
# Sigma(EW)=1.31 A

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Observation du 01.835/03/2007 :

01.835/03/2007
zeta_tau_2007301.fit
# EW(26.28=6547.69-6573.97)=-21.15 A
# sigma(EW)=1.49 A
# SNR=40

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Observation du 09.949/02/2007 :

09.949/02/2007
zeta_tau_2007209.fit
Mesure de la largeur équivalente : EW(26.08=6548.35-6574.44)=-24.3 Å.

# EW(54.41=6543.51-6597.92)=-28.6 A
# sigma(EW)=2.46 A
# SNR=43

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Observation du 09.886/01/2007 :

09.886/01/2007
zeta_tau_2007109.fit
# EW(22.12=6552.3-6574.42)=-19.83 A
# sigma(EW)=1.09 A
# SNR=48

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Observation du 18.818/11/2006 :

18.818/11/2006
zetatau_061118.fit
# EW(37.88=6548.3-6586.18)=-20.49 A
# sigma(EW)=1.47 A
# SNR=51.

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Observation du 14.955/10/2006 :

14.955/10/2006
zetatau_061014.fit
# EW(18.89=6551.68-6570.57)=-15.77 A
# sigma(EW)=1.25 A
# SNR=34

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Observation du 27.012/09/2006 :

27.012/09/2006
zetatau_060927b.fit
# Mesure de la largeur équivalente : EW(6543.9-6580.2)=-19.37 A,
# sigma(EW)=1.63 A, SNR=35.
# Mesure de la largeur équivalente : EW(6547.48-6572.83)=-18.12 A,
# sigma(EW)=0.44 A.
# SNR=34.6.


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