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The History of the Mysterious Eclipses of KH 15D: Asiago Observatory, 1967-1982
John A. Johnson, Joshua N. Winn
We are gathering archival observations to determine the photometric history of the unique and unexplained eclipses of the pre-main-sequence star KH 15D. Here we present a light cur…
Mass and dust in the disk of a spiral lens galaxy
Joshua N. Winn, Patrick B. Hall, Paul L. Schechter
Gravitational lensing is a potentially important probe of spiral galaxy structure, but only a few cases of lensing by spiral galaxies are known. We present Hubble Space Telescope a…
Limits on eclipses of the pre-main-sequence star KH 15D in the first half of the 20th century
Joshua N. Winn, Peter M. Garnavich, K. Z. Stanek +1
Over the last decade, the pre-main sequence star KH 15D has exhibited periodic eclipses that are surprisingly deep (~3 mag) and long-lasting (~40% of the 48.4-day period). The caus…
The Quintuple Quasar: Mass Models and Interpretation
Charles R. Keeton, Joshua N. Winn
The strange morphology of the six-component gravitational lens PMN J0134-0931 has resisted explanation. We present the first successful quantitative models for the system, based on…
The Quintuple Quasar: Radio and Optical Observations
Joshua N. Winn, Christopher S. Kochanek, Charles R. Keeton +1
We present results from high-resolution radio and optical observations of PMN J0134-0931, a gravitational lens with a unique radio morphology and an extremely red optical counterpa…