Characteristics of the Belgrade Astronomical Observatory's stellar spectrograph

• Main Authors: Vince Ištvan I., Lalović A.
• Format: Article
• Language: English
• Published: Astronomical Observatory, Department of Astronomy, Belgrade 2005-01-01
• Series: Serbian Astronomical Journal
• Subjects: Instrumentation: spectrographs
• Online Access: http://www.doiserbia.nb.rs/img/doi/1450-698X/2005/1450-698X0571055V.pdf

In this paper the main features of the new SpectraPro-750 spectrograph of Belgrade Astronomical Observatory are described. The instrumental profile of the spectrograph for the 1200 l/mm grating is determined using a fiber optic bundle with fibers arranged in a pseudo-slit pattern. This instrumental profile is compared to the instrumental profiles obtained when the same fiber optic bundle illuminates the entrance slit with different widths. From appropriate instrumental profiles the practical spectral purities and the spectral resolutions for different entrance slit widths are obtained. The variation of the reciprocal linear dispersion with wavelength in the spectral range 350 - 600 nm is determined. A proposal for a link between telescope and the spectrograph is given.