Improved Standardization of Type II-P Supernovae: Application to an Expanded Sample (2008)
Poznanski, Dovi, Butler, Nathaniel, Filippenko, Alexei V., Ganeshalingam, Mohan, Li, Weidong, Bloom, Joshua S., ...
In the epoch of precise and accurate cosmology, cross-confirmation using a variety of cosmographic methods is paramount to circumvent systematic uncertainties. Owing to progenitor histories and...
GRB Energetics in the Swift Era (2007)
Kocevski, Daniel, Butler, Nathaniel
We examine the rest frame energetics of 76 gamma-ray bursts (GRBs) with known redshift that were detected by the Swift spacecraft and monitored by the satellite's X-ray Telescope (XRT). Using the...
Pulse Width Evolution of Late Time X-rays Flares in GRBs: Evidence For Internal Shocks (2007)
Kocevski, Daniel, Butler, Nathaniel, Bloom, Joshua S.
We study the duration and variability of late time X-ray flares following gamma-ray bursts (GRBs) observed by the narrow field X-ray telescope (XRT) aboard the {\it Swift} spacecraft. These flares...
IR and Optical Observations of GRB 030115 (2004)
Dullighan, Allyn, Ricker, George, Butler, Nathaniel, Vanderspek, Roland
We present an upper limit on the brightness of the afterglow of the long GRB 030115 measured from Infrared (IR) images taken with the Magellan Classic Cam instrument of Ks > 22 at 6.2 days after the...