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The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars
A. Sota, J. Maíz Apellániz, N. I. Morrell +5
We present the second installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R ~ 2500 digital observations…
Optical and Near-IR Observations of the Faint and Fast 2008ha-like Supernova 2010ae
M. D. Stritzinger, E. Hsiao, S. Valenti +21
A comprehensive set of optical and near-infrared (NIR) photometry and spectroscopy is presented for the faint and fast 2008ha-like supernova (SN) 2010ae. Contingent on the adopted…
Persistent C II Absorption in the Normal Type Ia Supernova 2002fk
Régis Cartier, Mario Hamuy, Giuliano Pignata +16
We present well-sampled photometry of SN 2002fk starting 12 days before maximum light through 122 days after peak brightness, along with a series of 15 optical spectra f…
Characterizing a Dramatic Flare on an Ultracool Dwarf Found by the ASAS-SN Survey
Sarah J. Schmidt, Jose L. Prieto, K. Z. Stanek +19
We analyze a magnitude flare on the newly identified M8 dwarf SDSS J022116.84+194020.4 (hereafter SDSSJ0221) detected as part of the All-Sky Automated Survey for Superno…
Multi-Epoch High-Spectral-Resolution Observations of Neutral Sodium in 14 Type Ia Supernovae
A. Sternberg, A. Gal Yam, J. D. Simon +16
One of the main questions concerning Type Ia supernovae is the nature of the binary companion of the exploding white dwarf. A major discriminant between different suggested models…
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 Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
B. J. Shappee, J. L. Prieto, D. Grupe +44
After the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered a significant brightening of the inner region of NGC 2617, we began a ~70 day photometric and spectroscopic m…
Identification of red supergiants in nearby galaxies with mid-IR photometry
N. E. Britavskiy, A. Z. Bonanos, A. Mehner +3
The role of episodic mass loss in massive star evolution is one of the most important open questions of current stellar evolution theory. Episodic mass loss produces dust and there…
A statistical analysis of circumstellar material in Type Ia supernovae
Kate Maguire, Mark Sullivan, Ferdinando Patat +42
A key tracer of the elusive progenitor systems of Type Ia supernovae (SNe Ia) is the detection of narrow blueshifted time-varying Na I D absorption lines, interpreted as evidence o…
The Galactic O-Star Spectroscopic Catalog (GOSC) and Survey (GOSSS): first whole-sky results and further updates
J. Maíz Apellániz, A. Sota, N. I. Morrell +6
The Galactic O-Star Spectroscopic Survey (GOSSS) is obtaining high quality R~2500 blue-violet spectroscopy of all Galactic stars ever classified as of O type with B < 12 and a sign…
A panchromatic view of the restless SN2009ip reveals the explosive ejection of a massive star envelope
R. Margutti, D. Milisavljevic, A. M. Soderberg +54
The 2012 explosion of SN2009ip raises questions about our understanding of the late stages of massive star evolution. Here we present a comprehensive study of SN2009ip during its r…
Spectroscopy of Type Ia Supernovae by the Carnegie Supernova Project
Gastón Folatelli, Nidia Morrell, Mark M. Phillips +27
This is the first release of optical spectroscopic data of low-redshift Type Ia supernovae (SNe Ia) by the Carnegie Supernova Project including 604 previously unpublished spectra o…
On the Lira law and the nature of extinction towards Type Ia Supernovae
Francisco Förster, Santiago González-Gaitán, Gastón Folatelli +1
We have studied the relation between the color evolution of Type Ia Supernovae (SNe Ia) from maximum light to the Lira law regime and the presence of narrow absorption features. Ba…
Carnegie Supernova Project: Observations of Type IIn supernovae
F. Taddia, M. D. Stritzinger, J. Sollerman +16
The observational diversity displayed by various Type IIn supernovae (SNe IIn) is explored and quantified. In doing so, a more coherent picture ascribing the variety of observed SN…
SN 2012au: A Golden Link Between Superluminous Supernovae and Their Lower-Luminosity Counterparts
D. Milisavljevic, A. Soderberg, R. Margutti +25
We present optical and near-infrared observations of SN 2012au, a slow-evolving supernova (SN) with properties that suggest a link between subsets of energetic and H-poor SNe and s…
Serendipitous Discovery of An Infrared Bow Shock Near PSR J1549-4848 with Spitzer
Zhongxiang Wang, David L. Kaplan, Patrick O. Slane +2
We report on the discovery of an infrared cometary nebula around PSR J15494848 in our Spitzer survey of a few middle-aged radio pulsars. Following the discovery, multi-wavelengt…
The Earliest Near-infrared Time-series Spectroscopy of a Type Ia Supernova
E. Y. Hsiao, G. H. Marion, M. M. Phillips +19
We present ten medium-resolution, high signal-to-noise ratio near-infrared (NIR) spectra of SN 2011fe from SpeX on the NASA Infrared Telescope Facility (IRTF) and Gemini Near-Infra…