iPTF13beo: The Double-Peaked Light Curve of a Type Ibn Supernova Discovered Shortly after Explosion

Abstract

We present optical photometric and spectroscopic observations of the Type Ibn (SN 2006jc-like) supernova iPTF13beo. Detected by the intermediate Palomar Transient Factory ~3 hours after the estimated first light, iPTF13beo is the youngest and the most distant (~430 Mpc) Type Ibn event ever observed. The iPTF13beo light curve is consistent with light curves of other Type Ibn SNe and with light curves of fast Type Ic events, but with a slightly faster rise-time of two days. In addition, the iPTF13beo R-band light curve exhibits a double-peak structure separated by ~9 days, not observed before in any Type Ibn SN. A low-resolution spectrum taken during the iPTF13beo rising stage is featureless, while a late-time spectrum obtained during the declining stage exhibits narrow and intermediate-width He I and Si II features with FWHM ~ 2000-5000 km/s and is remarkably similar to the prototypical SN Ibn 2006jc spectrum. We suggest that our observations support a model of a massive star exploding in a dense He-rich circumstellar medium (CSM). A shock breakout in a CSM model requires an eruption releasing a total mass of ~0.1 Msun over a time scale of couple of weeks prior to the SN explosion.

8 pages, 5 figures, submitted to MNRAS

References in corpus (12)

• A giant outburst two years before the core-collapse of a massive star
• SN 2006jc: A Wolf-Rayet Star Exploding in a Dense He-Rich Circumstellar Medium
• The Automated Palomar 60-Inch Telescope
• Massive stars exploding in a He-rich circumstellar medium. I. Type Ibn (SN 2006jc-like) events
• SN 2009ip and SN 2010mc: Core-collapse Type IIn supernovae arising from blue supergiants
• SN 2010jl: Optical to hard X-ray observations reveal an explosion embedded in a ten solar mass cocoon
• A multi-wavelength investigation of the radio-loud supernova PTF11qcj and its circumstellar environment
• Massive stars exploding in a He-rich circumstellar medium. II. The transitional case of SN 2005la
• Swift and Chandra Detections of Supernova 2006jc: Evidence for Interaction of the Supernova Shock with a Circumstellar Shell
• Ultraviolet Spectroscopy of Supernovae: The First Two Years of Swift Observations
• Rapidly Fading Supernovae from Massive Star Explosions
• Optical photometry and spectroscopy of the type Ibn supernova SN 2006jc until the onset of dust formation

Cited by in corpus (33)

• Rapidly-Evolving and Luminous Transients from Pan-STARRS1
• Observational and Physical Classification of Supernovae
• The Palomar Transient Factory Core-Collapse Supernova Host-Galaxy Sample. I. Host-Galaxy Distribution Functions and Environment-Dependence of CCSNe
• Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light
• Evolutionary Models for Type Ib/c Supernova Progenitors
• Massive stars exploding in a He-rich circumstellar medium. IV. Transitional Type Ibn Supernovae
• Metallicity at the explosion sites of interacting transients
• The Double-Peaked SN2013ge: a Type Ib/c SN with an Asymmetric Mass Ejection or an Extended Progenitor Envelope
• Massive stars exploding in a He-rich circumstellar medium - IX. SN 2014av, and characterization of Type Ibn SNe
• Environments of interacting transients: Impostors and type IIn supernovae
• Jet or Shock Breakout? The Low-Luminosity GRB 060218
• A DECam Search for an Optical Counterpart to the LIGO Gravitational Wave Event GW151226
• SN 2015U: A Rapidly Evolving and Luminous Type Ibn Supernova
• Intermediate Palomar Transient Factory: Realtime Image Subtraction Pipeline
• Type Ibn Supernovae May not all Come from Massive Stars
• A search for an optical counterpart to the gravitational wave event GW151226
• Massive stars exploding in a He-rich circumstellar medium. V. Observations of the slow-evolving SN Ibn OGLE-2012-SN-006
• Model Light Curves for Type Ib and Ic Supernovae
• Massive stars exploding in a He-rich circumstellar medium. VI. Observations of two distant Type Ibn supernova candidates discovered by La Silla-QUEST
• Flash ionization signatures in the type Ibn supernova SN 2019uo
• Observational Properties of Type Ib/c Supernova Progenitors in Binary Systems
• Massive stars exploding in a He-rich circumstellar medium - VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal Type Ib Supernova
• SN 2012aa - a transient between Type Ibc core-collapse and superluminous supernovae
• Circumstellar and explosion properties of Type Ibn supernovae
• Massive stars exploding in a He-rich circumstellar medium - VIII. PSN J07285387+3349106, a highly reddened supernova Ibn
• SN 2020bqj: a Type Ibn supernova with a long lasting peak plateau
• The Highly Luminous Type Ibn Supernova ASASSN-14ms
• Evolution of A Peculiar Type Ibn Supernova SN 2019wep
• ASASSN-14ms:the Most Energetic Known Explosion of a Type Ibn Supernova and its Physical Origin
• Massive stars exploding in a He-rich circumstellar medium. XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc and 2024aej
• Revisiting GRB 060218: new insights into low-luminosity gamma-ray bursts from a revised shock breakout model
• Massive stars exploding in a He-rich circumstellar medium $-$ X. Flash spectral features in the Type Ibn SN 2019cj and observations of SN 2018jmt
• Towards Multi Energy Neutrino Astronomy: Diagnosing Enhanced Circumstellar Material around Stripped-Envelope Supernovae