Interstellar polarization and extinction toward the Recurrent Nova T CrB
  Spectropolarimetry is a powerful tool for diagnostic of interstellar matter
and gives information on the geometry of the ejected material after the novae
outbursts. In this paper are presented spectropolarimetric observations of the
recurrent nova T CrB at quiescence obtained with FoReRo2 attached to the
Cassegrain focus of the 2.0m RCC telescope of the Bulgarian Rozhen National
Astronomical Observatory. The interstellar polarization toward T CrB was
estimated using the field stars method. The spectropolarimetric observations
were obtained from February 2018 to August 2021. In the wavelength range from
4800~\AA~ to 8200~\AA~the maximum of the degree of linear polarization is
$P_{max}(obs)(\%) = 0.46 \pm 0.01$ at $\lambda \approx 5200$ \AA. The position
angle is $P.A._{obs}=100^{\circ}.8 \pm 0^{\circ}.9$. During the observations,
there is no intrinsic polarization in T CrB, and the derived values represent
interstellar polarization. The polarization toward T CrB is due to the
foreground interstellar dust located at the distance up to $\approx$ 400 pc.
Based on the degree of polarization the interstellar extinction toward the T
CrB is $E_{B-V} \approx 0.07$.
