A Digital Imaging Multi-Slit Spectrograph for Measurement of Line-of-Sight Velocities on the sun |
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| Authors: | Nandita Srivastava Shibu K Mathew |
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| Institution: | (1) Physical Research Laboratory, Udaipur Solar Observatory, Udaipur, 313001, India |
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| Abstract: | A multi-slit digital imaging spectrograph has been installed at Udaipur Solar Observatory, Udaipur (India) to measure the line-of-sight velocities in H associated with the mass motions of the dynamic phenomena on the solar surface viz. solar flares, eruptive prominences and surges. This spectrograph is being used in conjunction with a 15 cm aperture Coudé telescope to obtain the H spectra at a high rate of a specific region of interest on the Sun. In this paper, we describe the principal features of this instrument and the data acquisition method. We also present spectral observations of a surge and a quiescent prominence recorded using this instrument. |
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