Subaru high-resolution spectroscopy of star G in the tycho supernova remnant (2009)
Kerzendorf, Wolfgang E., Schmidt, Brian P., Asplund, M., Nomoto, Ken'ichi, Podsiadlowski, Ph., Frebel, Anna, ...
Patnaude, Daniel J., Fesen, Robert A.
We present Chandra ACIS X-ray observations of the Galactic supernova remnant Cassiopeia A taken in December 2007. Combining these data with previous archival Chandra observations taken in 2000, 2002,...
THE QUADRUPLE GRAVITATIONAL LENS PG 11151080: TIME DELAYS AND MODELS (2007)
Paul L. Schechter, Charles D. Bailyn, Robert Barr, Richard Barvainis, Christopher M. Becker, Gary M. Bernstein, ...
12 TODD HURT,
Evidence for Pre-SN Mass Loss in the Galactic SNR 3C 58 (2007)
Rudie, Gwen C., Fesen, Robert A.
We discuss the findings of a comprehensive imaging and spectroscopic survey of the optical emission associated with the supernova remnant 3C 58 (Fesen et al. 2007) as they relate to the topic of...
Evidence for Pre-SN Mass Loss in the Galactic SNR 3C 58 (2007)
Gwen C. Rudie, Robert A. Fesen
We discuss the ndings of a comprehensive imaging and spectroscopic survey of the optical emission associated with the supernova remnant 3C 58 (Fesen et al. 2007) as they relate to the topic of pre-SN...
Fesen, Robert A., Hoeflich, Peter A., Hamilton, Andrew J. S., Hammell, Molly C., Gerardy, Christopher L., Khokhlov, Alexei M., ...
We present HST images of the remnant of SN 1885 seen in absorption against M31's bulge via resonance lines of Ca I, Ca II, Fe I, and Fe II. Viewed in CaII H & K line absorption, the remnant appears...
Gerardy, Christopher L., Fesen, Robert A.
We present wide-field Halpha images of the Galactic supernova remnant G156.2+5.7 which reveal the presence of considerable faint Halpha line emission coincident with the remnant's X-ray emission. The...
A High-Altitude, Station-Keeping Astronomical Platform (2006)
Several commercial telecommunication ventures together with a well funded US military program make it a likely possibility that an autonomous, high-altitude, light-than-air (LTA) vehicle which could...
A high resolution UV absorption spectrum of supernova ejecta in SN1006 (2006)
Hamilton, Andrew J. S., Fesen, Robert A., Blair, William P.
We report a high resolution, far-ultraviolet, STIS E140M spectrum of the strong, broad Si II, III, and IV features produced by the ejecta of SN1006 seen in absorption against the background...
Probing Multiple Sight Lines through the SN 1006 Remnant by UV Absorption Spectroscopy (2006)
Winkler, P. Frank, Long, Knox S., Hamilton, Andrew J. S., Fesen, Robert A.
Absorption-line spectroscopy is an effective probe for cold ejecta within an SNR, provided that suitable background UV sources can be identified. For the SN 1006 remnant we have identified four such...
The asymmetric explosion of type Ia supernovae as seen from near-infrared observations (2006)
Motohara, Kentaro, Maeda, Keiichi, Gerardy, Christopher L., Nomoto, Ken'ichi, Tanaka, Masaomi, Tominaga, Nozomu, ...
Late-time X-Ray, UV and Optical Monitoring of Supernova 1979C (2005)
Immler, Stefan, Fesen, Robert A., Van Dyk, Schuyler D., Weiler, Kurt W., Petre, Robert, Lewin, Walter H. G., ...
We present results from observations of SN 1979C with XMM-Newton in X-rays and in the UV, archival X-ray and HST data, and follow-up ground-based optical imaging. The XMM-Newton MOS spectrum shows...
Late-time X-ray, UV, and optical monitoring of Supernova 1979C (2005)
Immler, Stefan, Fesen, Robert A., Van Dyk, Schuyler D., Weiler, Kurt W., Petre, Robert, Lewin, Walter H. G., ...
Signature of Electron Capture in Iron-Rich Ejecta of SN 2003du (2004)
Hoeflich, Peter, Gerardy, Christopher L., Nomoto, Kenichi, Motohara, Kentaro, Fesen, Robert A., Maeda, Keiichi, ...
Late-time near-infrared and optical spectra are presented for the normal-bright SN2003du. At about 300 days after the explosion, the emission profiles of well isolated [FeII] lines (in particular...
Carbon Monoxide in the Type Ic SN 2000ew (2002)
Gerardy, Christopher L., Fesen, Robert A., Nomoto, Ken'ichi, Maeda, Keiichi, Hoeflich, Peter, Wheeler, J. Craig
We present K-band (1.9 -- 2.5 micron) spectra of the Type Ic SN 2000ew observed with IRCS on the Subaru Telescope. These data show the first detection of carbon monoxide (CO) emission in a Type Ic...
The Nature of [Ar III] Bright Knots in the Crab Nebula (2001)
Schaller, Emily L., Fesen, Robert A.
The kinematic and morphological properties of a string of [Ar III] bright knots in the Crab Nebula are examined using 1994 - 1999 HST WFPC-2 images of the remnant. We find that five southern [Ar III]...
Hubble Space Telescope WFPC-2 Imaging of Cassiopeia A (2001)
Fesen, Robert A., Morse, Jon A., Chevalier, Roger A., Borkowski, Kazimierz J., Gerardy, Christopher L., Lawrence, Stephen S., ...
The young SNR Cassiopeia A was imaged with WFPC-2 through four filters selected to capture the complete velocity range of the remnant's main shell in several important emission lines. Primary lines...
Fransson, Claes, Chevalier, Roger A., Filippenko, Alexei V., Leibundgut, Bruno, Barth, Aaron J., Fesen, Robert A., ...
Optical and ultraviolet observations of the Type IIn supernova 1995N at epochs between 321 and 1799 days after the explosion show three distinct velocity components. The narrow lines come from...
The Expansion Center and Dynamical Age of the Galactic Supernova Remnant Cassiopeia A (2001)
Thorstensen, John R., Fesen, Robert A., Bergh, Sidney Van Den
We present proper motions for 21 bright main shell and 17 faint, higher-velocity, outer ejecta knots in the Cas A supernova remnant and use them to derive new estimates for the remnant's expansion...
Detection of CO and Dust Emission in Near-Infrared Spectra of SN 1998S (1999)
Gerardy, Christopher L., Fesen, Robert A., Hoeflich, Peter, Wheeler, J. Craig
Near-infrared spectra (0.95 -- 2.4 micron) of the peculiar Type IIn supernova 1998S in NGC 3877 from 95 to 355 days after maximum light are presented. K-band data taken at days 95 and 225 show the...
An Ultraviolet Fe II Image of SN 1885 in M31 (1999)
Hamilton, Andrew J. S., Fesen, Robert A.
Ultraviolet imaging of the remnant of Supernova 1885 in M31 with the Hubble Space Telescope using the F255W filter on the WFPC2 reveals a dark spot of Fe II absorption at the remnant's known position...
Late-Time Optical and UV Spectra of SN 1979C and SN 1980K (1998)
Fesen, Robert A., Gerardy, Christopher L., Filippenko, Alexei V., Matheson, Thomas, Chevalier, Roger A., Kirshner, Robert P., ...
A low-dispersion Keck I spectrum of SN 1980K taken in August 1995 (t = 14.8 yr after explosion) and a November 1997 MDM spectrum (t = 17.0 yr) show broad 5500 km s^{-1} emission lines of H\alpha, [O...
Hubble Space Telescope WFPC2 Imaging of SN 1979C and Its Environment (1998)
Van Dyk, Schuyler D., Peng, Chien Y., Barth, Aaron J., Filippenko, Alexei V., Chevalier, Roger A., Fesen, Robert A., ...
The locations of supernovae in the local stellar and gaseous environment in galaxies contain important clues to their progenitor stars. As part of a program to study the environments of supernovae...
HST Images and Spectra of the Remnant of SN 1885 in M31 (1998)
Fesen, Robert A., Gerardy, Christopher L., McLin, Kevin M., Hamilton, Andrew J. S.
Near UV HST images of the remnant of SN 1885 (S And) in M31 show a 0"70 +- 0"05 diameter absorption disk silhouetted against M31's central bulge, at SN 1885's historically reported position. The...
Far-UV Absorption Lines in the Remnant of SN 1006 (1997)
Wu, Chi-Chao, Crenshaw, D. Michael, Hamilton, Andrew J. S., Fesen, Robert A., Leventhal, Marvin, Sarazin, Craig
We have obtained a far-ultraviolet spectrum (1150 - 1600 Ang.) of a hot subdwarf star behind the remnant of SN 1006 with the Faint Object Spectrograph (FOS) on the Hubble Space Telescope. The...