Abstract
We have obtained deep CCD images of 14 PN to search for and examine faint halos. These images were obtained with Hβ, [OIII], Hα, and [NII] narrowband interference filters on the Burrell Schmidt at Kitt Peak. Table 1 summarizes the observations. We have found interesting features around NGC 1360, NGC 3587 (The Owl), and NGC 6853 (The Dumbbell), and we have obtained new images of the very faint outer halo of NGC 7293 (The Helix). Two CCDs were used: TI6, an 800×800 chip, with 1.45”/pix and a 19.3 arcmin square field., and ST2K, a 2048×2048 chip, of which only 1200×1200 pixels were read out, yielding 2.07”/pix and a 40 arcmin square field.
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References
Kwitter, K.B., Downes, R.A., and Chu, Y.-H. 1991, ”Schmidt CCD Images of the Dumbbell Nebula (NGC 6853),”
Bulletin of the A.A.S., 23, 914.Kwitter, K.B., Chu., Y.-H., and Downes, R.A. 1992, ”A Study of Planetary Nebula Halos,” in prepara tion.
Malin, D.F. 1982, ”A Look at Some Unstable Stars,” Sky and Telescope, 63, 22.
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© 1993 Springer Science+Business Media Dordrecht
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Kwitter, K.B., Chu, YH., Downes, R.A. (1993). CCD Imaging of Planetary Nebula Halos. In: Weinberger, R., Acker, A. (eds) Planetary Nebulae. International Astronomical Union / Union Astronomique Internationale, vol 155. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2088-3_81
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DOI: https://doi.org/10.1007/978-94-011-2088-3_81
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