Szymon Kozlowski

A Second Method to Photometrically Align Multi-Site Microlensing Light Curves: Source Color in Planetary Event MOA-2007-BLG-192 (2009)

Gould, Andrew, Dong, Subo, Bennett, David P., Bond, Ian A., Udalski, Andrzej, Kozlowski, Szymon

At present, microlensing light curves from different telescopes and filters are photometrically aligned by fitting them to a common model. We present a second method based on photometry of common...

Quantifying Quasar Variability As Part of a General Approach To Classifying Continuously Varying Sources (2009)

Kozlowski, Szymon, Kochanek, Christopher S., Udalski, A., Wyrzykowski, L., Soszynski, I., Szymanski, M. K., ...

Robust fast methods to classify variable light curves in large sky surveys are becoming increasingly important. While it is relatively straightforward to identify common periodic stars and particular...

Sub-Saturn Planet MOA-2008-BLG-310Lb: Likely To Be In The Galactic Bulge (2009)

Janczak, Julia, Fukui, A., Dong, Subo, Monard, B., Kozlowski, Szymon, Gould, A., ...

We report the detection of sub-Saturn-mass planet MOA-2008-BLG-310Lb and argue that it is the strongest candidate yet for a bulge planet. Deviations from the single-lens fit are smoothed out by...

Discovery of 5000 Active Galactic Nuclei behind the Magellanic Clouds (2009)

Kozlowski, Szymon, Kochanek, Christopher S.

We show that using mid-IR color selection to find active galactic nuclei (AGN) is as effective in dense stellar fields such as the Magellanic Clouds as it is in extragalactic fields with low stellar...

Microlensing Event MOA-2007-BLG-400: Exhuming the Buried Signature of a Cool, Jovian-Mass Planet (2008)

Dong, Subo, Bond, I. A., Gould, A., Kozlowski, Szymon, Miyake, N., Gaudi, B. S., ...

We report the detection of the cool, Jovian-mass planet MOA-2007-BLG-400Lb. The planet was detected in a high-magnification microlensing event (with peak magnification A_max = 628) in which the...