A black hole in the X-ray transient XTE J1859+226: The first confirmed with GTC
Journal article published in 2013 by
J. M. Corral Santana 
,
J. Casares,
T. Shahbaz,
C. Zurita,
I. G. Martínez Pais,
P. Rodríguez Gil
,
J. Casares,
T. Shahbaz,
C. Zurita,
I. G. Martínez Pais,
P. Rodríguez Gil
Abstract
We present the results of the analysis of the first black hole confirmed with GTC in the X-ray binary system XTE J1859+226. By combining optical photometry taken with the INT, WHT and NOT with long-slit spectroscopy with OSIRIS+GTC, we have obtained an orbital period of 6.58 h, a secondary star radial velocity amplitude of K2 = 541 ± 70 km s-1 and an upper limit to the inclination of 70°, implying a black hole mass of at least 5.4 M⊙. © 2013: Instituto de Astronomía, UNAM - Fourth Science Meeting with the GTC Ed. C. Muñoz-Tuñón & J. M. Rodríguez-Espinosa.