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Spectroscopic study of the extremely young O-type triple system Herschel 36 A in the Hourglass Nebula. I. Orbital properties
Abdo R. Campillay, Julia I. Arias, Rodolfo H. Barbá +3
We present a detailed spectroscopic study of Herschel 36 A (H36A), the main stellar component of the massive multiple system Herschel 36 in the Hourglass Nebula, based on high-reso…
Type II Supernovae as Distance Indicators at Near-IR Wavelengths
Ó. Rodríguez, G. Pignata, M. Hamuy +13
Motivated by the advantages of observing at near-IR wavelengths, we investigate Type II supernovae (SNe II) as distance indicators at those wavelengths through the Photospheric Mag…
Probing type Ia supernova properties using bolometric light curves from the Carnegie Supernova Project and the CfA Supernova Group
Richard A. Scalzo, Emilie Parent, Christopher Burns +11
We present bolometric light curves constructed from multi-wavelength photometry of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project and the CfA Supernova Group, usin…
A 34.5 day quasi-periodic oscillation in gamma-ray emission from the blazar PKS 2247-131
Jianeng Zhou, Zhongxiang Wang, Liang Chen +5
Since 2016 October, the active galaxy PKS 2247-131 has undergone a gamma-ray outburst, which we studied using data obtained with the Fermi Gamma-ray Space Telescope. The emission a…
The ASAS-SN Bright Supernova Catalog -- IV. 2017
T. W. -S. Holoien, J. S. Brown, P. J. Vallely +41
In this catalog we compile information for all supernovae discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN) as well as all other bright (), spectr…
Discovery of two quasars at from the OGLE Survey
Szymon Kozłowski, Eduardo Bañados, A. Udalski +16
We have used deep Optical Gravitational Lensing Experiment (OGLE-IV) images ( mag, mag at ) of the Magellanic System, encompassing an area of $\s…
Carnegie Supernova Project-II: Extending the Near-Infrared Hubble Diagram for Type Ia Supernovae to
M. M. Phillips, Carlos Contreras, E. Y. Hsiao +41
The Carnegie Supernova Project-II (CSP-II) was an NSF-funded, four-year program to obtain optical and near-infrared observations of a "Cosmology" sample of Type Ia supern…
A Runaway Giant in the Galactic Halo
Philip Massey, Stephen E. Levine, Kathryn F. Neugent +3
New evidence provided by the Gaia satellite places the location of the runaway star J01020100-7122208 in the halo of the Milky Way (MW) rather than in the Small Magellanic Cloud as…
Non-synchronous rotations in massive binary systems. HD93343 revisited
C. Putkuri, R. Gamen, N. I. Morrell +5
Context. Most massive stars are in binary or multiple systems. Several massive stars have been detected as doublelined spectroscopic binaries and among these, the OWN Survey has de…
Strongly Bipolar Inner Ejecta of the Normal Type IIP Supernova ASASSN-16at
Subhash Bose, Subo Dong, N. Elias-Rosa +24
We report distinctly double-peakedH-alpha and H-beta emission lines in the late-time, nebular-phase spectra (>~200 d) of the otherwise normal at early phases (<~ 100 d) Type IIP su…
Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
E. Y. Hsiao, M. M. Phillips, G. H. Marion +42
Shifting the focus of Type Ia supernova (SN Ia) cosmology to the near-infrared (NIR) is a promising way to significantly reduce the systematic errors, as the strategy minimizes our…
The Carnegie Supernova Project: Absolute Calibration and the Hubble Constant
Christopher. R. Burns, Emilie Parent, M. M. Phillips +23
We present an analysis of the final data release of the Carnegie Supernova Project I, focusing on the absolute calibration of the luminosity-decline-rate relation for Type Ia super…
Unravelling the infrared transient VVV-WIT-06: the case for an origin in a classical nova
Dipankar P. K. Banerjee, Eric Y. Hsiao, Tiara Diamond +6
The enigmatic near-infrared transient VVV-WIT-06 underwent a large amplitude eruption of unclear origin in July 2013. Based on its lightcurve properties and late-time post-outburst…
Red vs Blue: Early observations of thermonuclear supernovae reveal two distinct populations?
Maximilian D. Stritzinger, Benjamin J. Shappee, Anthony L. Piro +10
We examine the early phase intrinsic color evolution of a dozen Type~Ia supernovae discovered within three days of the inferred time of first light () and ha…
Reverberation Mapping of Luminous Quasars at High-z
Paulina Lira, Shai Kaspi, Hagai Netzer +6
We present Reverberation Mapping (RM) results for 17 high-redshift, high-luminosity quasars with good quality R-band and emission line light curves. We are able to measure statisti…
A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. IV. A Final Census
Kathryn F. Neugent, Philip Massey, Nidia Morrell
We summarize the results of our four year survey searching for Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). Over the course of this s…
A nearby superluminous supernova with a long pre-maximum 'plateau' and strong CII features
J. P. Anderson, P. J. Pessi, L. Dessart +63
Super-luminous supernovae (SLSNe) are rare events defined as being significantly more luminous than normal terminal stellar explosions. The source of the extra powering needed to a…
Signatures of an eruptive phase before the explosion of the peculiar core-collapse SN 2013gc
Andrea Reguitti, Andrea Pastorello, Giuliano Pignata +12
We present photometric and spectroscopic analysis of the peculiar core-collapse SN 2013gc, spanning seven years of observations. The light curve shows an early maximum followed by…
A Significantly off-center Ni56 Distribution for the Low-Luminosity Type Ia Supernova SN 2016brx from the 100IAS survey
Subo Dong, Boaz Katz, Juna A. Kollmeier +17
We present nebular-phase spectra of the Type Ia supernova (SN Ia) 2016brx, a member of the 1991bg-like subclass that lies at the faint end of the SN Ia luminosity function. Nebular…
The lowest metallicity type II supernova from the highest mass red-supergiant progenitor
J. P. Anderson, L. Dessart, C. P. Gutiérrez +29
Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae. However, while such stars are observed with masses >25M, de…
SN 2012fr: Ultraviolet, Optical, and Near-Infrared Light Curves of a Type Ia Supernova Observed Within a Day of Explosion
Carlos Contreras, M. M. Phillips, Christopher R. Burns +32
We present detailed ultraviolet, optical and near-infrared light curves of the Type Ia supernova (SN) 2012fr, which exploded in the Fornax cluster member NGC 1365. These precise hi…
Metallicity and distance of NGC 6362 from its RR Lyrae and SX Phoenicis stars
A. Arellano Ferro, J. A. Ahumada, I. H. Bustos Fierro +2
New time-series VI CCD photometry of the globular cluster NGC 6362 is studied with the aim of estimating the reddening, mean metallicity and distance of the cluster from its popula…
A Runaway Yellow Supergiant Star in the Small Magellanic Cloud
Kathryn Neugent, Philip Massey, Nidia Morrell +2
We recently discovered a yellow supergiant (YSG) in the Small Magellanic Cloud (SMC) with a heliocentric radial velocity of ~300 km/s which is much larger than expected for a star…