76 citations · 151 across the 5 of their papers we have counts for
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astro-ph2002★ 42 cited
Hubble Space Telescope Expansion Parallaxes of the Planetary Nebulae NGC 6578, NGC 6884, NGC 6891, and IC 2448
Stacy Palen, Bruce Balick, Arsen R. Hajian +3
We have combined two epochs of Hubble Space Telescope WFPC2 imaging data with ground-based expansion velocities to determine distances to three planetary nebulae (NGC 6578, NGC 688…
astro-ph1999★ 76 cited
HST Measurements of the Expansion of NGC 6543: Parallax Distance and Nebular Evolution
D. S. Reed, B. Balick, A. R. Hajian +5
The optical expansion parallax of NGC 6543 has been detected and measured using two epochs of HST images separated by a time baseline of only three years. We have utilized three se…