The Carnegie Supernova Project II. Observations of the intermediate luminosity red transient SNhunt120

Abstract

We present multi-wavelength observations of two gap transients followed by the Carnegie Supernova Project-II and supplemented with data obtained by a number of different programs. Here in the first of two papers, we focus on the intermediate luminosity red transient (ILRT) designated SNhunt120, while in a companion paper we examine the luminous red novae AT 2014ej. Our data set for SNhunt120 consists of an early optical discovery, estimated to be within 3 days after outburst, the subsequent optical and near-infrared broadband followup extending over a $\sim$2 month period, two visual- and two near-infrared wavelength spectra, and Spitzer Space Telescope observations extending from early ($+$28 d) to late ($+$1155 d) phases. SNhunt120 resembles other ILRTs such as NGC 300-2008-OT and SN 2008S, and like these other ILRTs, SNhunt120 exhibits prevalent mid-infrared emission at both early and late phases. From the comparison of SNhunt120 and other ILRTs to electron-capture supernova simulations, we find that the current models underestimate the explosion kinetic energy and thereby produce synthetic light curves that over-estimate the luminosity. Finally, examination of pre-outburst Hubble Space Telescope images yields no progenitor detection.

arXiv commentPaper 1 of a series of 2. Eight pages of text, 14 figures, and 10 tables. Replaced to match the version published on A&A

References in corpus (66)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Correcting for the Effects of Interstellar Extinction
• Binary interaction dominates the evolution of massive stars
• [O III]/[N II] as an Abundance Indicator at High Redshift
• HyperLEDA. III. The catalogue of extragalactic distances
• Exploring the Optical Transient Sky with the Palomar Transient Factory
• Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars
• Explosions of O-Ne-Mg Cores, the Crab Supernova, and Subluminous Type II-P Supernovae
• The Effects of Binary Evolution on the Dynamics of Core Collapse and Neutron-Star Kicks
• Cosmicflows-3
• Oxygen and nitrogen abundances in nearby galaxies. Correlations between oxygen abundance and macroscopic properties
• The Remarkable Deaths of 9 - 11 Solar Mass Stars
• The Supernova Channel of Super-AGB Stars
• The Carnegie Supernova Project: The Low-Redshift Survey
• On the Source of the Dust Extinction in Type Ia Supernovae and the Discovery of Anomalously Strong Na I Absorption
• Luminous Blue Variable eruptions and related transients: Diversity of progenitors and outburst properties
• Super and massive AGB stars - IV. Final fates - Initial to final mass relation
• Low Luminosity Type II Supernovae: Spectroscopic and Photometric Evolution
• Discovery of the Dust-Enshrouded Progenitor of SN 2008S with Spitzer
• A New Class of Luminous Transients and A First Census of Their Massive Stellar Progenitors
• The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf Explosions
• Advanced burning stages and fate of 8-10 Mo stars
• SN 1997bs in M66: Another Extragalactic Eta Carinae Analog?
• SN 2008S: an electron capture SN from a super-AGB progenitor?
• An unusually brilliant transient in the galaxy Messier 85
• Super-AGB Stars and their role as Electron Capture Supernova progenitors
• The 2008 Luminous Optical Transient in the Nearby Galaxy NGC 300
• An Intermediate Luminosity Transient in NGC300: The Eruption of a Dust-Enshrouded Massive Star
• SN 2008S: A Cool Super-Eddington Wind in a Supernova Impostor
• Do electron-capture supernovae make neutron stars? First multidimensional hydrodynamic simulations of the oxygen deflagration
• Luminous Red Novae: Stellar Mergers or Giant Eruptions?
• Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light
• Common Envelope ejection for a Luminous Red Nova in M101
• On Absorption by Circumstellar Dust, With the Progenitor of SN2012aw as a Case Study
• EC-SNe from super-AGB progenitors: theoretical models vs. observations
• Massive-Star Mergers and the Recent Transient in NGC4490: A More Massive Cousin of V838 Mon and V1309 Sco
• A massive star origin for an unusual helium-rich supernova in an elliptical galaxy
• Carnegie Supernova Project-II: Extending the Near-Infrared Hubble Diagram for Type Ia Supernovae to $z\sim 0.1$
• Supernova Explosions of Super-Asymptotic Giant Branch Stars: Multicolor Light Curves of Electron-Capture Supernovae
• Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program
• A very faint core-collapse supernova in M85
• Remnants and ejecta of thermonuclear electron-capture supernovae: Constraining oxygen-neon deflagrations in high-density white dwarfs
• Electron-capture supernovae exploding within their progenitor wind
• Unmasking the Supernova Impostors
• Almost Gone: SN~2008S and NGC~300 2008OT-1 are Fainter than their Progenitors
• Dusty Explosions from Dusty Progenitors: The Physics of SN2008S and the 2008 NGC300-OT
• A Spitzer/IRS Spectrum of the 2008 Luminous Transient in NGC 300: Connection to Proto-Planetary Nebulae
• PTF10fqs: A Luminous Red Nova in the Spiral Galaxy Messier 99
• SN 2012fr: Ultraviolet, Optical, and Near-Infrared Light Curves of a Type Ia Supernova Observed Within a Day of Explosion
• Discovery of an Exceptionally Strong $\beta$-Decay Transition of ${}^{20}$F and Implications for the Fate of Intermediate-Mass Stars
• NGC 300 OT2008-1 As a Scaled-Down Version of the Eta Carinae Great Eruption
• Supernova Impostors and other Gap Transients
• The Photometric and Spectral Evolution of the 2008 Luminous Optical Transient in NGC 300
• The transitional gap transient AT 2018hso: new insights on the luminous red nova phenomenon
• The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova?
• Simultaneous spectroscopic and photometric analysis of galaxies with STARLIGHT: CALIFA $+$ GALEX
• MASTER OT J004207.99+405501.1/M31LRN 2015 Luminous Red Nova in M31: Discovery, Light Curve, Hydrodynamics, Evolution
• Operation of the jet feedback mechanism (JFM) in intermediate luminosity optical transients (ILOTs)
• J0453+1559: a neutron star-white dwarf binary from a thermonuclear electron-capture supernova?
• Discovery of an intermediate-luminosity red transient in M51 and its likely dust-obscured, infrared-variable progenitor
• The dusty aftermath of SN Hunt248: merger-burst remnant?
• The Carnegie Supernova Project II. Observations of the intermediate luminosity red transient SNhunt120
• Observations of the Optical Transient in NGC 300 with AKARI/IRC: Possibilities of Asymmetric Dust Formation
• AT 2019abn: multi-wavelength observations over the first 200 days
• Modeling X-ray Emission Line Profiles from Massive Star Winds - A Review

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