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Comparative intensity and density mapping of NGC 40

Published online by Cambridge University Press:  25 May 2016

Trina L. Ray  and
C. T. Daub
Trina L. Ray
Affiliation:
1Mount Laguna Observatory, San Diego State University
C. T. Daub
Affiliation:
1Mount Laguna Observatory, San Diego State University

Extract

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Two dimensional spectro-imaging of the planetary nebula NGC 40 was done to create spatially resolved intensity and electron density images. The CCD images, taken in Hβ, [S ii] λ6717, and [S ii] λλ6717, 6731, were calibrated, then correlated using previously published spectroscopic and photometric data of NGC 40 as a flux standard.

Type
IV. Envelopes
Information
Symposium - International Astronomical Union , Volume 180: Planetary Nebulae , 1997 , pp. 272
Copyright
Copyright © Kluwer 1997