9 January 1984 A High Resolution Pressure Scanned Photoelectric Fabry-Perot Spectrometer For Velocity Field Studies Of Extended Objects
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Abstract
The paper briefly describes a high resolution (Rz 50, 000) pressure scanned Fahry-Perot spectro-meter with photon counting detection. The spectrometer, which is designed for the study of emission line profiles in gaseous nebulae, has been used at f/13 Cassegrain focii of 1 metre telescopes in Kavalur and Nainital, India. The pressure variation is done in a step wise fashion; the pressure and photon counts are simultaneously recorded at each step on a paper printer and a digital cassette tape. The spectrometer along with its electronic data acquisition system is schematically given and some interesting results obtained in the velocity mapping of planetary nebulae NGC 3242 and NGC 6720 are presented.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kailash C Sahu, J N Desai, N S. Jog, "A High Resolution Pressure Scanned Photoelectric Fabry-Perot Spectrometer For Velocity Field Studies Of Extended Objects", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); doi: 10.1117/12.966122; https://doi.org/10.1117/12.966122
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