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On the Source of the Dust Extinction in Type Ia Supernovae and the Discovery of Anomalously Strong Na I Absorption
M. M. Phillips, Joshua D. Simon, Nidia Morrell +28
High-dispersion observations of the Na I D 5890, 5896 and K I 7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 Angstroms in the spectra of 32 Type Ia supern…
The UV-bright, Slowly Declining Transient PS1-11af as a Partial Tidal Disruption Event
R. Chornock, E. Berger, S. Gezari +34
We present the Pan-STARRS1 discovery of the long-lived and blue transient PS1-11af, which was also detected by GALEX with coordinated observations in the near-ultraviolet (NUV) ban…
PS1-12sk is a Peculiar Supernova From a He-rich Progenitor System in a Brightest Cluster Galaxy Environment
N. E. Sanders, A. M. Soderberg, R. J. Foley +29
We report on our discovery and observations of the Pan-STARRS1 supernova (SN) PS1-12sk, a transient with properties that indicate atypical star formation in its host galaxy cluster…
PS1-10afx at z=1.388: Pan-STARRS1 Discovery of a New Type of Superluminous Supernova
Ryan Chornock, E. Berger, A. Rest +32
We present the Pan-STARRS1 discovery of PS1-10afx, a unique hydrogen-deficient superluminous supernova (SLSN) at z=1.388. The light curve peaked at z_P1=21.7 mag, making PS1-10afx…
An ultraviolet-optical flare from the tidal disruption of a helium-rich stellar core
S. Gezari, R. Chornock, A. Rest +31
The flare of radiation from the tidal disruption and accretion of a star can be used as a marker for supermassive black holes that otherwise lie dormant and undetected in the centr…
The X-ray properties of typical high-redshift radio-loud quasars
C. Saez, W. N. Brandt, O. Shemmer +5
We report spectral, imaging, and variability results from four new XMM-Newton observations and two new Chandra observations of high-redshift (z > 4) radio-loud quasars (RLQs). Our…
The Fossil Record of Two-phase Galaxy Assembly: Kinematics and Metallicities in the Nearest S0 Galaxy
Jacob A. Arnold, Aaron J. Romanowsky, Jean P. Brodie +5
We present a global analysis of kinematics and metallicity in the nearest S0 galaxy, NGC 3115, along with implications for its assembly history. The data include high-quality wide-…
A Universal Luminosity Function for Radio Supernova Remnants
Laura Chomiuk, Eric M. Wilcots
We compile radio supernova remnant (SNR) samples from the literature for 19 nearby galaxies ranging from the SMC to Arp 220, and use this data to constrain the SNR luminosity funct…
A Search for Radio Supernova Remnants in Four Irregular Galaxies
Laura Chomiuk, Eric Wilcots
We survey four nearby irregular galaxies for radio supernova remnants (SNRs) using deep (1 sigma ~ 20 microJy), high resolution (~20 pc) VLA continuum data at 20, 6, and 3.6 cm. We…