Erratum: “The Carnegie Supernova Project. I. Third Photometry Data Release of Low-redshift Type Ia Supernovae and Other White Dwarf Explosions” (2017, AJ, 154, 211)

Krisciunas, K.; Contreras, C.; Burns, Christopher R.; Phillips, M. M.; Hamuy, M.; Stritzinger, M. D.; Anais, J.; Boldt, Luis; Busta, L.; Campillay, A.; Castellón, S.; Folatelli, G.; Freedman, Wendy L.; González, C.; Hsiao, E. Y.; Krzemiński, W.; Morrell, N.; Persson, S. E.; Roth, M.; Salgado, Francisco; Serón, J.; Suntzeff, Nicholas B.; Torres-Robledo, S.; Filippenko, A. V.; Li, Weidong; Madore, Barry F.; DePoy, D. L.; Marshall, J. L.; Rheault, Jean-Philippe; Villanueva, Steven

doi:10.3847/1538-3881/aa9a3d

Cited by 59 publications

(123 citation statements)

References 7 publications

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“…The LCO du Pont 2.5 m telescope was used with the facility Tek5 CCD camera to obtain host-galaxy reference images as well as a small amount of SN follow-up photometry. As discussed in detail in §6.1.2 of Krisciunas et al (2017), experiments carried out on two SN fields observed in both the Swope SITe3 and du Pont + Tek5 systems confirm that the SN photometry obtained in the ugriBV filters with the du Pont + Tek5 is on substantially the same natural system as the Swope + SITe3 camera.…”

Section: Du Pont 25 M Telescopesupporting

confidence: 60%

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Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

Phillips

Contreras

Hsiao

et al. 2018

PASP

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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 ∼ 100 Type Ia supernovae located in the smooth Hubble flow (0.03 z 0.10). Light curves were also obtained of a "Physics" sample composed of 90 nearby Type Ia supernovae at z ≤ 0.04 selected for near-infrared spectroscopic time-series observations. The primary emphasis of the CSP-II is to use the combination of optical and near-infrared photometry to achieve a distance precision of better than 5%. In this paper, details of the supernova sample, the observational strategy, and the characteristics of the photometric data are provided. In a companion paper, the near-infrared spectroscopy component of the project is presented.

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Section: Du Pont 25 M Telescopesupporting

confidence: 60%

“…The methodology of the CSP photometric reductions is explained in detail in Krisciunas et al (2017), but we briefly reproduce it here for completeness. First, we solve for color terms and extinction based on observations on photometric nights of Landolt (1992) and Smith et al (2002) standard stars.…”

Section: Swope 1 M Telescopementioning

confidence: 99%

Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

Phillips

Contreras

Hsiao

et al. 2018

PASP

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“…SN 1991bg-like events) suggests that similar events should be easily detectable in a reasonably large volume of the local universe (out to z ≈ 0.1 for a limiting magnitude of r = 20.5 mag). However, no such event has been reported in previous studies of large samples of thermonuclear SNe (e.g., Hicken et al 2009;Maguire et al 2014;Krisciunas et al 2017;Scolnic et al 2018). To date, tentative evidence for only one other example of a relatively thin He shell detonation has been presented in Jiang et al (2017) (see also Polin et al 2018), although their modeling implies a more massive WD with a smaller He shell than is needed to explain ZTF 18aaqeasu.…”

Section: Discussionmentioning

confidence: 93%

ZTF 18aaqeasu (SN2018byg): A Massive Helium-shell Double Detonation on a Sub-Chandrasekhar-mass White Dwarf

Kasliwal

Polin

et al. 2019

ApJL

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The detonation of a helium shell on a white dwarf has been proposed as a possible explosion triggering mechanism for Type Ia supernovae. Here, we report ZTF 18aaqeasu (SN 2018byg/ATLAS 18pqq), a peculiar Type I supernova, consistent with being a helium-shell double-detonation. With a rise time of ≈ 18 days from explosion, the transient reached a peak absolute magnitude of M R ≈ −18.2 mag, exhibiting a light curve akin to sub-luminous SN 1991bg-like Type Ia supernovae, albeit with an unusually steep increase in brightness within a week from explosion. Spectra taken near peak light exhibit prominent Si absorption features together with an unusually red color (g − r ≈ 2 mag) arising from nearly complete line blanketing of flux blue-wards of 5000Å. This behavior is unlike any previously observed thermonuclear transient. Nebular phase spectra taken at and after ≈ 30 days from peak light reveal evidence of a thermonuclear detonation event dominated by Fe-group nucleosynthesis. We show that the peculiar properties of ZTF 18aaqeasu are consistent with the detonation of a massive (≈ 0.15 M ) helium shell on a sub-Chandrasekhar mass (≈ 0.75 M ) white dwarf after including mixing of ≈ 0.2 M of material in the outer ejecta. These observations provide evidence of a likely rare class of thermonuclear supernovae arising from detonations of massive helium shells.

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“…0.87±0.02 0.036 ± 0.001 −0.0059 ± 0.0003 33.6 ± 0.8 1.12 ± 0.03 2009dc 0.72±0.03 0.037 ± 0.003 −0.0045 ± 0.0005 36.2 ± 3.7 1.21 ± 0.12 2012dn 0.92±0.04 0.059 ± 0.007 −0.0106 ± 0.0005 37.9 ± 2.5 1.26 ± 0.08 ASASSN-15pz 0.67±0.07 0.033 ± 0.003 −0.0040 ± 0.0002 40.8 ± 1. (Taubenberger et al 2011;Friedman et al 2015), and a sample selected from the literature (Friedman et al 2015;Krisciunas et al 2017).…”

Section: Swift Uvot Light Curvementioning

confidence: 99%

ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia^∗

Chen

Dong

Katz

et al. 2019

ApJ

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We report comprehensive multi-wavelength observations of a peculiar Type Ia-like supernova ("SN Ia-pec") ASASSN-15pz. ASASSN-15pz is a spectroscopic "twin" of SN 2009dc, a so-called "Super-Chandrasekhar-mass" SN, throughout its evolution, but it has a peak luminosity M B,peak = −19.69 ± 0.12 mag that is ≈ 0.6 mag dimmer and comparable to the SN 1991T sub-class of SNe Ia at the luminous end of the normal width-luminosity relation. The synthesized 56 Ni mass of M56 Ni = 1.13 ± 0.14M is also substantially less than that found for several 2009dc-like SNe. Previous well-studied 2009dclike SNe have generally suffered from large and uncertain amounts of host-galaxy extinction, which is negligible for ASASSN-15pz. Based on the color of ASASSN-15pz, we estimate a host extinction for SN 2009dc of E(B − V ) host = 0.12 mag and confirm its high luminosity (M B,peak [2009dc] ≈ −20.3 mag). The 2009dc-like SN population, which represents ∼ 1% of SNe Ia, exhibits a range of peak luminosities, and do not fit onto the tight width-luminosity relation. Their optical light curves also show significant diversity of late-time ( 50 days) decline rates. The nebular-phase spectra provide powerful diagnostics to identify the 2009dc-like events as a distinct class of SNe Ia. We suggest referring to these sources using the phenomenology-based "2009dc-like SN Ia-pec" instead of "Super-Chandrasekhar SN Ia," which is based on an uncertain theoretical interpretation. a Nordic Optical Telescope (2.56 m) located at Roque de los Muchachos Observatory, La Palma in the Canary Islands; b du Pont telescope (2.5 m) located in Chile at Las Campanas Observatory; c New Technology Telescope (3.58 m) located in Chile at the La Silla Observatory; d One of the Magellan Telescopes (6.5 m) located at Las Campanas Observatory in Chile; e One of the Magellan Telescopes (6.5 m) located at Las Campanas Observatory in Chile

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Erratum: “The Carnegie Supernova Project. I. Third Photometry Data Release of Low-redshift Type Ia Supernovae and Other White Dwarf Explosions” (2017, AJ, 154, 211)

Cited by 59 publications

References 7 publications

Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

ZTF 18aaqeasu (SN2018byg): A Massive Helium-shell Double Detonation on a Sub-Chandrasekhar-mass White Dwarf

ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia^∗

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Erratum: “The Carnegie Supernova Project. I. Third Photometry Data Release of Low-redshift Type Ia Supernovae and Other White Dwarf Explosions” (2017, AJ, 154, 211)

Cited by 59 publications

References 7 publications

Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

ZTF 18aaqeasu (SN2018byg): A Massive Helium-shell Double Detonation on a Sub-Chandrasekhar-mass White Dwarf

ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia∗

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ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia^∗