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J/MNRAS/405/2570    Linear polarization of nearby bright stars  (Bailey+, 2010)

The linear polarization of nearby bright stars measured at the parts per million level. Bailey J., Lucas P.W., Hough J.H. <Mon. Not. R. Astron. Soc., 405, 2570-2578 (2010)> =2010MNRAS.405.2570B
ADC_Keywords: Stars, nearby ; Polarization Keywords: polarization - techniques: polarimetric - ISM: magnetic fields Abstract: We report observations of the linear polarization of a sample of 49 nearby bright stars measured to sensitivities of between ∼1 and ∼4x10-6. The majority of stars in the sample show measurable polarization, but most polarizations are small with 75 per cent of the stars having P<2x10-5. Description: The observations were obtained with the PlanetPol polarimeter mounted on the 4.2-m aperture William Herschel Telescope (WHT) which is located at the Observatorio de Roque de Los Muchachos (ORM) at La Palma in the Canary Islands. The bulk of the measurements described here were obtained over the period 2005 April 25 to May 9. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 73 49 Properties of sample stars table2.dat 42 35 Previous polarization measurements table3.dat 66 49 Planetpol linear polarization measurements
See also: II/226 : Stellar polarization catalogs agglomeration (Heiles, 2000) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- HR HR number 6- 25 A20 --- OName Other names 26- 30 F5.2 mag Vmag V magnitude 32- 39 A8 --- SpType MK spectral type 41- 44 F4.1 pc Dist Heliocentric distance 46- 47 I2 h RAh Right ascension (J2000) 49- 50 I2 min RAm Right ascension (J2000) 52 A1 --- DE- Declination sign (J2000) 53- 54 I2 deg DEd Declination (J2000) 56- 57 I2 arcmin DEm Declination (J2000) 59- 63 F5.1 deg GLON Galactic longitude 65- 68 F4.1 deg GLAT Galactic latitude 70 A1 --- l_vsini Limit flag on vsini 71- 73 I3 km/s vsini ? Rotational velocity
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- HR HR number 6- 10 F5.3 % Pol ? Polarization (Heiles, 2000, Cat. II/226) 12- 16 F5.3 % e_Pol ? rms uncertainty on PH 18- 20 I3 10-5 Q/I.T ? Q/I Stokes parameter (Tinbergen, 1982A&A...105...53T) 22 I1 10-5 e_Q/I.T ? rms uncertainty on Q/IT 24- 26 I3 10-5 U/I.T ? U/I Stokes parameter (Tinbergen, 1982A&A...105...53T) 28 I1 10-5 e_U/I.T ? rms uncertainty on U/IT 30- 32 I3 10-5 Q/I.P ? Q/I Stokes parameter (Piirola, 1977A&AS...30..213P) 34- 35 I2 10-5 e_Q/I.P ? rms uncertainty on Q/IP 37- 39 I3 10-5 U/I.P ? U/I Stokes parameter (Piirola, 1977A&AS...30..213P) 41- 42 I2 10-5 e_U/I.P ? rms uncertainty on U/IP
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- HR HR number 6- 22 A17 --- Dates Date(s) of observation 23- 28 F6.1 10-6 Q/I Q/I Stokes parameter 30- 32 F3.1 10-6 e_Q/I rms uncertainty on Q/I 34- 39 F6.1 10-6 U/I U/I Stokes parameter 41- 43 F3.1 10-6 e_U/I rms uncertainty on U/I 45- 50 F6.1 10-6 Pol Polarisation (is calculated from Pol=sqrt[(Q/I)2+(U/I)2]) 52- 54 F3.1 10-6 e_Pol rms uncertainty on P 56- 60 F5.1 deg theta Polarisation position angle 62- 66 F5.1 deg e_theta rms uncertainty on theta
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Dec-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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