The He-Rich Core-Collapse Supernova 2007y: Observations From X-Ray to Radio Wavelengths

Stritzinger, M. D.; Mazzali, P. A.; Phillips, M. M.; Immler, S.; Söderberg, A. M.; Sollerman, J.; Boldt, Luis; Braithwaite, Jonathan; Brown, P. J.; Burns, C. R.; Contreras, C.; Covarrubias, R.; Folatelli, G.; Freedman, Wendy L.; González, S.; Hamuy, M.; Krzemiński, W.; Madore, Barry F.; Milne, Peter; Morrell, N.; Persson, S. E.; Roth, M.; Smith, M.; Suntzeff, Nicholas B.

doi:10.1088/0004-637x/696/1/713

Cited by 116 publications

(149 citation statements)

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“…Our dataset consists of optical light curves of 34 SE SNe, with a subset of 26 objects also having accompanying near-infrared (NIR) light curves. Three of these objects -SN 2005bf , SN 2007Y (Stritzinger et al 2009), and SN 2009bb (Pignata et al 2011) -have been the subject of individual case studies by the CSP-I. The photometry reported here of these objects supersedes what has been previously published, and is based on definitive color and extinction coefficient terms characterizing the CSP-I natural photometric system as presented by Krisciunas et al (2017).…”

Section: Introductionmentioning

confidence: 50%

The Carnegie Supernova Project I

Stritzinger

Anderson

Contreras

et al. 2018

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The first phase of the Carnegie Supernova Project (CSP-I) was a dedicated supernova follow-up program based at the Las Campanas Observatory that collected science data of young, low-redshift supernovae between 2004 and 2009. Presented in this paper is the CSP-I photometric data release of low-redshift stripped-envelope core-collapse supernovae. The data consist of optical (uBgVri) photometry of 34 objects, with a subset of 26 having near-infrared (Y JH) photometry. Twenty objects have optical pre-maximum coverage with a subset of 12 beginning at least five days prior to the epoch of B-band maximum brightness. In the near-infrared, 17 objects have pre-maximum observations with a subset of 14 beginning at least five days prior to the epoch of J-band maximum brightness. Analysis of this photometric data release is presented in companion papers focusing on techniques to estimate host-galaxy extinction and the light-curve and progenitor star properties of the sample. The analysis of an accompanying visual-wavelength spectroscopy sample of ∼150 spectra will be the subject of a future paper.

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Section: Introductionmentioning

confidence: 50%

The Carnegie Supernova Project I

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et al. 2018

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“…Although the amount of 56 Ni is often correlated with (Silverman et al 2013), the under luminous Type IIP SN 2008bk (CSP, unpublished), and the Type Ib SN 2007Y (Stritzinger et al 2009). Each spectrum is labeled with respect to T (B max ), except for SN 2008bk whose epoch is with respect to the date of discovery.…”

Section: Discussionmentioning

confidence: 99%

Optical and near-IR observations of the faint and fast 2008ha-like supernova 2010ae

Stritzinger

Hsiao

Valenti

et al. 2014

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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 value of host extinction, SN 2010ae reached a peak brightness of −13.8 > M V > −15.3 mag, while modeling of the UVOIR light curve suggests it produced 0.003-0.007 M of 56 Ni, ejected 0.30−0.60 M of material, and had an explosion energy of 0.04-0.30 × 10 51 erg. The values of these explosion parameters are similar to the peculiar SN 2008ha -for which we also present previously unpublished early phase optical and NIR light curves -and places these two transients at the faint end of the 2002cx-like SN population. Detailed inspection of the post-maximum NIR spectroscopic sequence indicates the presence of a multitude of spectral features, which are identified through SYNAPPS modeling to be mainly attributed to Co ii. Comparison with a collection of published and unpublished NIR spectra of other 2002cx-like SNe, reveals that a Co ii footprint is ubiquitous to this subclass of transients, providing a link to Type Ia SNe. A visual-wavelength spectrum of SN 2010ae obtained at +252 days past maximum shows a striking resemblance to a similar epoch spectrum of SN 2002cx. However, subtle differences in the strength and ratio of calcium emission features, as well as diversity among similar epoch spectra of other 2002cx-like SNe indicates a range of physical conditions of the ejecta, highlighting the heterogeneous nature of this peculiar class of transients.

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“…The simulated CCSNe are drawn from the SNANA library of 42 CCSN light curve templates (26 Type II and 16 Type Ib/c). These templates are derived from the SN samples of the Sloan Digital Sky Survey (Frieman et al 2008;Sako et al 2008;D'Andrea et al 2010), Supernova Legacy Survey (Astier et al 2006), and Carnegie Supernova Project (Hamuy et al 2006;Stritzinger et al 2009;Morrell 2012). Each CCSN template defines the underlying shape and color of the synthetic light curves, which is then modified with free parameters for the date of peak, redshift, host extinction (A V ), and luminosity (Δm, the shift in magnitudes relative to the peak of the assumed luminosity function).…”

Section: The Stardust Classifiermentioning

confidence: 99%

TYPE Ia SUPERNOVA RATE MEASUREMENTS TO REDSHIFT 2.5 FROM CANDELS: SEARCHING FOR PROMPT EXPLOSIONS IN THE EARLY UNIVERSE

et al. 2014

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The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) was a multi-cycle treasury program on the Hubble Space Telescope (HST) that surveyed a total area of ∼0.25 deg 2 with ∼900 HST orbits spread across five fields over three years. Within these survey images we discovered 65 supernovae (SNe) of all types, out to z ∼ 2.5. We classify ∼24 of these as Type Ia SNe (SNe Ia) based on host galaxy redshifts and SN photometry (supplemented by grism spectroscopy of six SNe). Here we present a measurement of the volumetric SN Ia rate as a function of redshift, reaching for the first time beyond z = 2 and putting new constraints on SN Ia progenitor models. Our highest redshift bin includes detections of SNe that exploded when the universe was only ∼3 Gyr old and near the peak of the cosmic star formation history. This gives the CANDELS high redshift sample unique leverage for evaluating the fraction of SNe Ia that explode promptly after formation (<500 Myr). Combining the CANDELS rates with all available SN Ia rate measurements in the literature we find that this prompt SN Ia fraction is f P = 0.53 ±0.09 stat0.10 ±0.10 sys0.26 , consistent with a delay time distribution that follows a simple t −1 power law for all times t > 40 Myr. However, mild tension is apparent between ground-based low-z surveys and space-based high-z surveys. In both CANDELS and the sister HST program CLASH (Cluster Lensing And Supernova Survey with Hubble), we find a low rate of SNe Ia at z > 1. This could be a hint that prompt progenitors are in fact relatively rare, accounting for only 20% of all SN Ia explosions-though further analysis and larger samples will be needed to examine that suggestion.

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The He-Rich Core-Collapse Supernova 2007y: Observations From X-Ray to Radio Wavelengths

Cited by 116 publications

References 93 publications

The Carnegie Supernova Project I

The Carnegie Supernova Project I

Optical and near-IR observations of the faint and fast 2008ha-like supernova 2010ae

TYPE Ia SUPERNOVA RATE MEASUREMENTS TO REDSHIFT 2.5 FROM CANDELS: SEARCHING FOR PROMPT EXPLOSIONS IN THE EARLY UNIVERSE

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