BD +37 1160 : a probable optical counterpart of the X-ray source 1H 0521+373.
Rossi, C.; Giovannelli, F.; Kurt, V. G.; Sheffer, E. K.; Persi, P.; Manchanda, R. K.; Ferrari-Toniolo, M.; Polcaro, V. F.; Gershberg, R.; La Padula, C.; Golinskaya, I. M.; Misykima, T. A.; Shafer, E. Yu.; Shamolin, V. M.; Smirnov, A. S.; Boyarchuck, A. A.
Italy
Abstract
Results are reported on detailed X-ray, UV, optical, and IR observations of two stars: BD + 37 deg 1146 and BD + 37 deg 1160. These data suggest that the star BD 37 deg 1160 is the optical counterpart of the X-ray source 1H 0516 + 373. It is shown that the optical spectrum of this star displays rapidly variable emision features, an IR excess emission, and a strong similarity to X Per, which also has a similar hard X-ray spectrum.