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Proceedings Paper

A High Resolution Pressure Scanned Photoelectric Fabry-Perot Spectrometer For Velocity Field Studies Of Extended Objects
Author(s): Kailash C Sahu; J N Desai; N S. Jog
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Paper 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.

Paper Details

Date Published: 9 January 1984
PDF: 4 pages
Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); doi: 10.1117/12.966122
Show Author Affiliations
Kailash C Sahu, Physical Research Laboratory (India)
J N Desai, Physical Research Laboratory (India)
N S. Jog, Physical Research Laboratory (India)

Published in SPIE Proceedings Vol. 0445:
Instrumentation in Astronomy V
Alec Boksenberg; David L. Crawford, Editor(s)

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