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Home All issues Volume 497 / No 1 (April I 2009) A&A, 497 1 (2009) 195-207 Full HTML
   

Table 3:

Astrometric measurements for the $\theta ^1$Ori C binary system.
Telescope Date Filter Flux ratio $\Theta$ $\rho$ Ref.
      $F_{\rm C2}/F_{\rm C1}$ [$^\circ $] [mas]  
BTA 6 m/Speckle 1997.784 H $0.26 \pm 0.02$ $226.0 \pm 3$ $33 \pm 2$ a
BTA 6 m/Speckle 1998.838 K' $0.32 \pm 0.03$ $222.0 \pm 5$ $37 \pm 4$ a
BTA 6 m/Speckle 1999.737 J $0.31 \pm 0.02$ $214.0 \pm 2$ $43 \pm 1$ b
BTA 6 m/Speckle 1999.8189 G' $0.35 \pm 0.04$ $213.5 \pm 2$ $42 \pm 1$ c
BTA 6 m/Speckle 2000.8734 V' $0.35 \pm 0.03$ $210.0 \pm 2$ $40 \pm 1$ c
BTA 6 m/Speckle 2001.184 J $0.29 \pm 0.02$ $208.0 \pm 2$ $38 \pm 1$ b
BTA 6 m/Speckle 2003.8 J $0.30 \pm 0.02$ $19.3 \pm 2$ $29 \pm 2$ c
BTA 6 m/Speckle 2003.9254 V' - $19.0 \pm 2$ $29 \pm 2$ c
BTA 6 m/Speckle 2003.928 V' - $19.1 \pm 2$ $29 \pm 2$ c
BTA 6 m/Speckle 2004.8216 V' $0.34 \pm 0.04$ $10.5 \pm 4$ $24 \pm 4$ c
IOTA 2005.92055 H $0.28 \pm 0.03$ $342.74 \pm 2$ $13.55 \pm 0.5$ c
NPOI 2006.1486 V - $332.3 \pm 3.5$ $11.80 \pm 1.11$ d
VLTI/AMBER 2007.0192 K $0.31 \pm 0.03$ $274.9 \pm 1$ $11.04 \pm 0.5$ -
NPOI 2007.1425 V - $268.1 \pm 5.2$ $11.94 \pm 0.31$ d
NPOI 2007.1507 V - $272.9 \pm 8.8$ $12.13 \pm 1.58$ d
NPOI 2007.1753 V - $266.6 \pm 2.1$ $12.17 \pm 0.37$ d
NPOI 2007.2055 V - $265.6 \pm 1.9$ $12.28 \pm 0.41$ d
NPOI 2007.2137 V - $263.0 \pm 2.3$ $12.14 \pm 0.43$ d
BTA 6 m/Speckle 2007.9014 V' $0.29 \pm 0.02$ $238.0 \pm 2$ $19.8 \pm 2$ -
VLTI/AMBER 2007.9233 H+K $0.24 \pm 0.07$ $241.2 \pm 1$ $19.07 \pm 0.5$ -
ESO 3.6 m/Speckle 2008.0274 B' $0.29 \pm 0.02$ $237.0 \pm 3$ $19.7 \pm 3$ -
ESO 3.6 m/Speckle 2008.0274 V' $0.31 \pm 0.02$ $236.5 \pm 3$ $19.6 \pm 3$ -
BTA 6 m/Speckle 2008.0712 V' $0.31 \pm 0.02$ $236.2 \pm 2$ $20.1 \pm 2$ -
VLTI/AMBER 2008.1479 H+K $0.23 \pm 0.09$ $234.6 \pm 1$ $21.17 \pm 0.5$ -
VLTI/AMBER 2008.1726 H+K $0.26 \pm 0.06$ $236.4 \pm 1$ $21.27 \pm 0.5$ -
Notes - The position angles given in Col. 5 are measured East of North and were corrected for the 180$^\circ $-calibration problem described in Sect. 2.1.
References - (a) Weigelt et al. (1999), (b) Schertl et al. (2003), (c) Kraus et al. (2007), (d) Patience et al. (2008).

Source LaTeX | All tables | In the text

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