Optical identifications of five INTEGRAL hard X-ray sources in the Galactic plane for the first time. The optical observations were performed with the 1.5-
m RTT-150 telescope (Turkish National
Optical identification of the hard X-ray source IGR J18257-0707 associatedwith a faint optical object (
m R ≈ 20.4) whose optical spectrumexhibits a broad H α emission line
Optical identifications of five INTEGRAL hard X-ray sources in the Galactic plane for the first time. The optical observations were performed with the 1.5-
m RTT-150 telescope (Turkish National
Optical identification of the hard X-ray source IGR J18257-0707 associatedwith a faint optical object (
m R ≈ 20.4) whose optical spectrumexhibits a broad H α emission line
Observations of the optical afterglow from GRB 060526 with the RTT-150 telescope-Turkish 1.5-
m RTT-150 telescope (Mount Bakyrlytepe, Turkey) are presented. The afterglow light curve