Polarimetric and spectroscopic optical observations of the ultra-compact X-ray binary 4U 0614+091
Aims: We present a polarimetric and spectroscopic study of the persistent ultra-compact X-ray binary 4U 0614+091 aimed at searching for the emission of a relativistic particle jet and at unveiling the orbital period Porb of the system. Methods: We obtained r-band polarimetric observations with the Telescopio Nazionale Galileo (TNG) equipped with
Baglio, M. C. et al.
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2014