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The RR Lyrae Distance to the Draco Dwarf Spheroidal Galaxy
A. Z. Bonanos, K. Z. Stanek, A. H. Szentgyorgyi +2
We present the first CCD variability study of the Draco dwarf spheroidal galaxy. The data were obtained with the FLWO 1.2 m telescope on 22 nights, over a period of 10 months, cove…
High-Precision Photometry of the Gamma-Ray Burst 020813: The Smoothest Afterglow Yet
L. T. Laursen, K. Z. Stanek
We report results of our precise reduction of the high signal-to-noise VRI observations of the optical afterglow of the gamma-ray burst GRB 020813 obtained by Gladders & Hall with…
The Type Ic Hypernova SN 2003dh/GRB 030329
P. A. Mazzali, J. Deng, N. Tominaga +6
The spectra of SN 2003dh, identified in the afterglow of GRB030329, are modeled using radiation transport codes. It is shown that SN 2003dh had a high explosion kinetic energy ($\s…
Photometry and Spectroscopy of GRB 030329 and Its Associated Supernova 2003dh: The First Two Months
T. Matheson, P. M. Garnavich, K. Z. Stanek +4
We present extensive optical and infrared photometry of the afterglow of gamma-ray burst (GRB) 030329 and its associated supernova (SN) 2003dh over the first two months after detec…
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…
Re-analysis of VLT Data for M83 with Image Subtraction -- Nine-fold Increase in Number of Cepheids
A. Z. Bonanos, K. Z. Stanek
We apply the image subtraction method to re-analyze the ESO Very Large Telescope data on M83 (NGC 5236), obtained and analyzed by Thim et al. Whereas Thim et al. found 12 Cepheids…