SIMBAD references

A search for new faint carbon (C) stars in the Polar region δ> 55°has been accomplished by obtain-ing objective prism spectra in the visual and near infrared 550 - 900 nm on images of CCD camera of Baldone Schmidt telescope of Astrophysical observatory of Uni-versity of Latvia obtained from May 2006 till June 2015. The positions of stars having color indices (J -K) > 1.3 mag were selected in Two Micron All Sky Infrared Survey - 2MASS to pick out potential carbon stars.Our survey is limited in brightness by J < 0 mag. Iden-tification of observed lines and molecular bands in men-tioned region are given. The comparison of low resolution spectra of M, C and Zr-type stars are given.24 new carbon stars were found. Using distribution of absolute magnitudes of carbon stars in Large Magellanic Cloud (LMC) was evaluated the M_k for newly discovered C stars. Various spectral gradients of carbon stars with known effective temperatures obtained by other methods are studied, and a correlation is found between Teff and the spectral gradient [757 - 685]. The interstellar absorption was calculated from reddening, which is taken from in-frared full-sky dust maps. Such characteristics as true color index (J -L)₀ effective temperature T_eff, distance from the Sun in kpc, absolute magnitude M_k, bolometric magnitude, were obtained for newly discovered carbon stars. The accuracy of distances is small and mainly de-pends on dispersion of M_k in LMC and reaches 30%