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@Article{PereyraRodrMart:2015:MeCoPo,
               author = "Pereyra, Antonio and Rodrigues, Cl{\'a}udia Vilega and Martioli, 
                         E.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Laborat{\'o}rio 
                         Nacional de Astrof{\'{\i}}sica (LNA)}",
                title = "Measuring the continuum polarization with ESPaDOnS",
              journal = "Astronomy and Astrophysics",
                 year = "2015",
               volume = "573",
                month = "Jan.",
             keywords = "Instrumentation: polarimeters, Polarization, Stars: pre-main 
                         sequence, Techniques: polarimetric.",
             abstract = "Aims. Our goal is to test the feasibility of obtaining accurate 
                         measurements of the continuum polarization from high-resolution 
                         spectra using the spectropolarimetric mode of ESPaDOnS. Methods. 
                         We used the new pipeline OPERA to reduce recent and archived 
                         ESPaDOnS data. Several polarization standard stars and science 
                         objects were tested for the linear mode. In addition, the circular 
                         mode was tested using several objects from the archive with 
                         expected null polarization. Synthetic broad-band polarization was 
                         computed from the ESPaDOnS continuum polarization spectra and 
                         compared with published values (when available) to quantify the 
                         accuracy of the instrument. Results. The continuum linear 
                         polarization measured by ESPaDOnS is consistent with broad-band 
                         polarimetry measurements available in the literature. The accuracy 
                         in the degree of linear polarization is around 0.2-0.3% 
                         considering the full sample. The accuracy in polarization position 
                         angle using the most polarized objects is better than 5. 
                         Consistent with this, the instrumental polarization computed for 
                         the circular continuum polarization is also between 0.2-0.3%. Our 
                         results suggest that measurements of the continuum polarization 
                         using ESPaDOnS are viable and can be used to study many 
                         astrophysical objects.",
                  doi = "10.1051/0004-6361/201423492",
                  url = "http://dx.doi.org/10.1051/0004-6361/201423492",
                 issn = "0004-6361 and 1432-0746",
             language = "en",
        urlaccessdate = "04 dez. 2020"
}


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