54 citations · 54 across the 1 of their papers we have counts for
8 papers · 1 filter
Donut: measuring optical aberrations from a single extra-focal image
A. Tokovinin, S. Heathcote
We propose a practical method to calculate Zernike aberrations from analysis of a single long-exposure defocused stellar image. It consists in fitting the aberration coefficients a…
Proper Motions of the HH 47 Jet Observed with the Hubble Space Telescope
P. Hartigan, S. Heathcote, J. Morse +2
We present a proper motion study of the shock waves within the classic stellar jet HH 47 based on Hubble Space Telescope H-alpha and [S II] images of the region taken over two epoc…
The Three-Dimensional Circumstellar Environment of SN 1987A
Ben E. K. Sugerman, Arlin P. S. Crotts, William E. Kunkel +2
We present the detailed construction and analysis of the most complete map to date of the circumstellar environment around SN 1987A, using ground and space-based imaging from the p…
A New View of the Circumstellar Environment of SN 1987A
Ben E. K. Sugerman, Arlin P. S. Crotts, William E. Kunkel +2
We summarize the analysis of a uniform set of both previously-known and newly-discovered scattered-light echoes, detected within 30" of SN 1987A in ten years of optical imaging, an…
3-D Kinematics of the HH 110 jet
Rosario Lopez, Robert Estalella, Alejandro C. Raga +3
We present new results on the kinematics of the jet HH 110. New proper motion measurements have been calculated from [SII] CCD images obtained with a time baseline of nearly fiftee…
3-D Photoionization Structure and Distances of Planetary Nebulae II. Menzel 1
Hektor Monteiro, Hugo E. Schwarz, Ruth Gruenwald +2
We present the results of a spatio-kinematic study of the planetary nebula Menzel 1 using spectro-photometric mapping and a 3-D photoionization code. We create several 2-D emission…