Shawn Poindexter

Microlensing Evidence That A Type 1 Quasar Is Viewed Face On (2009)

Poindexter, Shawn, Kochanek, Christopher S.

Using a microlensing analysis of 11-years of OGLE V-band photometry of the four image gravitational lens Q2237+0305, we measure the inclination i of the accretion disk to be cos i > 0.63 at 68%...

The Transverse Peculiar Velocity of the Q2237+0305 Lens Galaxy and the Mean Mass of Its Stars (2009)

Poindexter, Shawn, Kochanek, Christopher S.

Using 11-years of OGLE V-band photometry of Q2237+0305, we measure the transverse velocity of the lens galaxy and the mean mass of its stars. We can do so because, for the first time, we fully...

A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT (2007)

Pepper, Joshua, Stanek, K. Z., Pogge, Richard W., Latham, David W., DePoy, D. L., Siverd, Robert, ...

The Kilodegree Extremely Little Telescope (KELT) project is a small aperture, wide-angle search for planetary transits of solar-type stars. In this paper, we present the results of a commissioning...

The Spatial Structure of An Accretion Disk (2007)

Poindexter, Shawn, Morgan, Nicholas, Kochanek, Christopher S.

Based on the microlensing variability of the two-image gravitational lens HE1104-1805 observed between 0.4 and 8 microns, we have measured the size and wavelength-dependent structure of the quasar...

The Kilodegree Extremely Little Telescope (KELT): A Small Robotic Telescope for Large-Area Synoptic Surveys (2007)

Pepper, Joshua, Pogge, Richard W., DePoy, D. L., Marshall, J. L., Stanek, K. Z., Stutz, Amelia M., ...

The Kilodegree Extremely Little Telescope (KELT) project is a survey for planetary transits of bright stars. It consists of a small-aperture, wide-field automated telescope located at Winer...

Systematic Analysis of 22 Microlensing Parallax Candidates (2005)

Poindexter, Shawn, Afonso, Cristina, Bennett, David P., Glicenstein, Jean-Francois, Gould, Andrew, Szymanski, Michal K., ...

We attempt to identify all microlensing parallax events for which the parallax fit improves \Delta\chi^2 > 100 relative to a standard microlensing model. We outline a procedure to identify three...

Systematic analysis of 22 microlensing parallax candidates (2005)

Poindexter, Shawn, Afonso, Cristina, Bennett, David P., Glicenstein, Jean-Francois, Gould, Andrew, Szymanski, Michal K., ...

We attempt to identify all microlensing parallax events for which the parallax fit improves Deltachi2>100 relative to a standard microlensing model. We outline a procedure to identify three types of...