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Home All issues Volume 502 / No 3 (August II 2009) A&A, 502 3 (2009) 929-936 Full HTML
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Table 3:

Polarisation degrees and observing dates of standard stars: highly-polarised and (in italics) non-polarised.

Object		 Date Filter Q/I1 U/I1 $P_{\rm Obs}$ $P_{\rm Foss}$ $\theta_{\rm Obs} $ $\theta_{\rm Foss}$
  (UT)   (%) (%) (%) (%) ($^{\rm o}$) ($^{\rm o}$)
WD1615-154 02/08/05 R-Bessel +0.13 +0.16 0.14 ... -25 ...
WD1344+106 01/08/05 I-Bessel $-0.07\pm0.13$ $+0.13\pm0.11$ 0-0.199 ... $+34\pm23$ ...
WD0310-688 19/08/06 I-Bessel +0.17 +0.03 0.17 ... +5 ...
WD0310-688 21/08/06 I-Bessel +0.05 +0.06 0.08 ... +24 ...
Hiltner 652 03/08/05 V-Bessel +6.29 +0.33 6.30 $6.25\pm 0.01$ 179.7 $179.18\pm0.20$
Hiltner 652 03/08/05 R-Bessel +5.90 -0.28 5.91 $6.07\pm0.02$ 179.8 $179.39\pm0.10$
NGC 2024 03/08/05 R-Bessel -0.22 -9.63 9.63 $9.62\pm 0.01$ 45.5 $135.84\pm0.02$
NGC 2024 03/08/05 I-Bessel -0.48 -9.13 9.14 $9.12\pm 0.04$ 46.4 $136.26\pm0.15$
NGC 2024 03/08/05 V-Bessel +0.57 -9.58 9.60 $9.65\pm 0.06$ 134.9 $135.47\pm0.59$
Hiltner 652 01/08/06 I-Bessel +5.43 -0.64 5.47 $5.61\pm0.04 ^3$ 179.5 $179.18\pm0.11^3$
Hiltner 652 02/09/06 I-Bessel +5.55 -0.59 5.52 $5.61\pm0.04 ^3$ 179.8 $179.18\pm0.11^3$
NGC 2024 03/09/06 R-Bessel -0.11 -9.58 9.58 $9.62\pm 0.01$ 45.9 $135.84\pm0.02$
NGC2024 10/08/06 I-Bessel -0.59 -9.16 9.18 $9.12\pm 0.04$ 46.0 $136.26\pm0.15$
BD-125133 02/09/06 I-Bessel +1.04 -3.38 3.54 $3.57\pm0.09$ 146.4 $143.99\pm2.27$
1 The Q/I and U/I values are not corrected for the pleochroism (see text). 2 The reference polarisation degrees and angles are from Fossati et al. (2007). 3 Fossati et al. (2007) only reports measurements using the PMOS mode. For the B and V filters for which they report measurements in both IPOL and PMOS modes, one finds differences up to $(0.10\pm0.02)$% and $(0.38\pm0.14)\deg$.

Source LaTeX | All tables | In the text

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