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View article: Identification and Photometric Classification of Extragalactic Transients in the Vera C. Rubin Observatory’s Data Preview 1
Identification and Photometric Classification of Extragalactic Transients in the Vera C. Rubin Observatory’s Data Preview 1 Open
The Vera C. Rubin Observatory will soon survey the southern sky, delivering a depth and sky coverage that is unprecedented in time-domain astronomy. As part of commissioning, Data Preview 1 (DP1) has been released. It comprises a Legacy Su…
View article: ZTF SNe Ia DR2: Towards cosmology-grade ZTF supernova light curves using scene modeling photometry
ZTF SNe Ia DR2: Towards cosmology-grade ZTF supernova light curves using scene modeling photometry Open
The Zwicky Transient Facility (ZTF) is conducting a wide-field survey of the northern sky in three optical bands and the collaboration cosmology working group has released 3628 spectroscopically confirmed Type Ia supernovae (SNe Ia) discov…
View article: ZTF SN Ia DR2 follow-up: Exploring the origin of the Type Ia supernova host galaxy step through Si II velocities
ZTF SN Ia DR2 follow-up: Exploring the origin of the Type Ia supernova host galaxy step through Si II velocities Open
The relationship between Type Ia supernovae (SNe Ia) and their host galaxy stellar masses is well documented. In particular, Hubble residuals display a luminosity shift based on host mass, known as the mass step, which is often used as an …
View article: The La Silla Schmidt Southern Survey
The La Silla Schmidt Southern Survey Open
We present the La Silla Schmidt Southern Survey (LS4), a new wide-field, time-domain survey to be conducted with the 1 m ESO Schmidt telescope. The 268 megapixel LS4 camera mosaics 32 2k × 4k fully depleted CCDs, providing a ∼20 deg 2 fiel…
View article: A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie
A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie Open
Type Ia Supernovae (SNe Ia) are crucial tools to measure the accelerating expansion of the universe, comprising thousands of SNe across multiple telescopes. Accurate measurements of cosmological parameters with SNe Ia require a robust unde…
View article: ZTF SN Ia DR2: Improved SN Ia colors through expanded dimensionality with SALT3+
ZTF SN Ia DR2: Improved SN Ia colors through expanded dimensionality with SALT3+ Open
Context. Type Ia supernovae (SNe Ia) are a key probe in modern cosmology, as they can be used to measure luminosity distances at gigaparsec scales. Models of their light curves are used to project heterogeneous observed data onto a common …
View article: An Agnostic Approach to Building Empirical Type Ia Supernova Light Curves: Evidence for Intrinsic Chromatic Flux Variation Using Nearby Supernova Factory Data
An Agnostic Approach to Building Empirical Type Ia Supernova Light Curves: Evidence for Intrinsic Chromatic Flux Variation Using Nearby Supernova Factory Data Open
We present a new empirical Type Ia supernova (SN Ia) model with three chromatic flux variation templates: one phase dependent and two phase independent. No underlying dust extinction model or patterns of intrinsic variability are assumed. …
View article: The La Silla Schmidt Southern Survey
The La Silla Schmidt Southern Survey Open
We present the La Silla Schmidt Southern Survey (LS4), a new wide-field, time-domain survey to be conducted with the 1 m ESO Schmidt telescope. The 268 megapixel LS4 camera mosaics 32 2k$\times$4k fully depleted CCDs, providing a $\sim$20 …
View article: ZTF SN Ia DR2: High-velocity components in the Si ii λ6355
ZTF SN Ia DR2: High-velocity components in the Si ii λ6355 Open
L. Harvey et al.
View article: ZTF SN Ia DR2: Environmental dependencies of stretch and luminosity for a volume-limited sample of 1000 type Ia supernovae
ZTF SN Ia DR2: Environmental dependencies of stretch and luminosity for a volume-limited sample of 1000 type Ia supernovae Open
Context. Type Ia supernova (SN Ia) cosmology studies will soon be dominated by systematic, uncertainties, rather than statistical ones. Thus, it is crucial to understand the unknown phenomena potentially affecting their luminosity that may…
View article: ZTF SN Ia DR2: An environmental study of Type Ia supernovae using host galaxy image decomposition
ZTF SN Ia DR2: An environmental study of Type Ia supernovae using host galaxy image decomposition Open
ZTF DR2 Special Issue
View article: ZTF SN Ia DR2: The diversity and relative rates of the thermonuclear SN population
ZTF SN Ia DR2: The diversity and relative rates of the thermonuclear SN population Open
G. Dimitriadis et al.
View article: ZTF SN Ia DR2: Peculiar velocities impact on the Hubble diagram
ZTF SN Ia DR2: Peculiar velocities impact on the Hubble diagram Open
B. Carreres et al.
View article: ZTF SN Ia DR2: Colour standardisation of type Ia supernovae and its dependence on the environment
ZTF SN Ia DR2: Colour standardisation of type Ia supernovae and its dependence on the environment Open
Context. As type Ia supernova cosmology transitions from a statistics-dominated to a systematics-dominated era, it is crucial to understand the remaining unexplained uncertainties that affect their luminosity, such as those stemming from a…
View article: ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments
ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments Open
Context. The unprecedented statistics of detected Type Ia supernovae (SNe Ia) brought by the Zwicky Transient Facility (ZTF) enable us to probe the impact of the large-scale structure (LSS) on the properties of these objects. Aims. The goa…
View article: ZTF SN Ia DR2: The diversity and relative rates of the thermonuclear supernova population
ZTF SN Ia DR2: The diversity and relative rates of the thermonuclear supernova population Open
The Zwicky Transient Facility SN Ia Data Release 2 (ZTF SN Ia DR2) contains more than 3000 Type Ia supernovae (SNe Ia), providing the largest homogeneous low-redshift sample of SNe Ia. Having at least one spectrum per event, this data coll…
View article: Candidate strongly lensed type Ia supernovae in the Zwicky Transient Facility archive
Candidate strongly lensed type Ia supernovae in the Zwicky Transient Facility archive Open
Context. Gravitationally lensed type Ia supernovae (glSNe Ia) are unique astronomical tools that can be used to study cosmological parameters, distributions of dark matter, the astrophysics of the supernovae, and the intervening lensing ga…
View article: ZTF SN Ia DR2: Properties of the low-mass host galaxies of Type Ia supernovae in a volume-limited sample
ZTF SN Ia DR2: Properties of the low-mass host galaxies of Type Ia supernovae in a volume-limited sample Open
In this study, we explore the characteristics of `low-mass' ($\log(M_{\star}/M_{\odot}) \leq 8$) and `intermediate-mass' ($8 \lt \log(M_{\star}/M_{\odot}) \leq 10$) host galaxies of Type Ia supernovae (SNe Ia) from the second data release …
View article: ZTF SN Ia DR2: An environmental study of Type Ia supernovae using host galaxy image decomposition
ZTF SN Ia DR2: An environmental study of Type Ia supernovae using host galaxy image decomposition Open
The second data release of Type Ia supernovae (SNe Ia) observed by the Zwicky Transient Facility has provided a homogeneous sample of 3628 SNe Ia with photometric and spectral information. This unprecedented sample size enables us to bette…
View article: ZTF SN Ia DR2: Study of Type Ia supernova light-curve fits
ZTF SN Ia DR2: Study of Type Ia supernova light-curve fits Open
Type Ia supernova (SN Ia) cosmology relies on the estimation of light-curve parameters to derive precision distances, which are used to infer cosmological parameters such as H 0 , Ω M , Ω Λ , and w . The empirical SALT2 light-curve modelin…
View article: ZTF SN Ia DR2: Impact of the galaxy cluster environment on the stretch distribution of Type Ia supernovae
ZTF SN Ia DR2: Impact of the galaxy cluster environment on the stretch distribution of Type Ia supernovae Open
Context. Understanding the impact of the astrophysical environment on Type Ia supernova (SN Ia) properties is crucial to minimize systematic uncertainties in cosmological analyses based on this probe. Aims. We investigate the dependence of…
View article: ZTF SN Ia DR2: Simulations and volume limited sample
ZTF SN Ia DR2: Simulations and volume limited sample Open
Type Ia supernovae (SNe Ia) constitute an historical probe to derive cosmological parameters through the fit of the Hubble-Lemaître diagram, i.e. SN Ia distance modulus versus their redshift. In the era of precision cosmology, realistic si…
View article: ZTF SN Ia DR2: Overview
ZTF SN Ia DR2: Overview Open
We present the first homogeneous release of several thousand Type Ia supernovae (SNe Ia), all having spectroscopic classification, and spectroscopic redshifts for half the sample. This release, named the "DR2", contains 3628 nearby (z < 0.…
View article: A cosmic formation site of silicon and sulphur revealed by a new type of supernova explosion
A cosmic formation site of silicon and sulphur revealed by a new type of supernova explosion Open
The cores of stars are the cosmic furnaces where light elements are fused into heavier nuclei. The fusion of hydrogen to helium initially powers all stars. The ashes of the fusion reactions are then predicted to serve as fuel in a series o…
View article: ZTF SN Ia DR2: The spectral diversity of Type Ia supernovae in a volume-limited sample
ZTF SN Ia DR2: The spectral diversity of Type Ia supernovae in a volume-limited sample Open
More than 3000 spectroscopically confirmed Type Ia supernovae (SNe Ia) are presented in the Zwicky Transient Facility SN Ia Data Release 2 (ZTF DR2). In this paper, we detail the spectral properties of 482 SNe Ia near maximum light, up to …
View article: ZTF SN Ia DR2: The secondary maximum in Type Ia supernovae
ZTF SN Ia DR2: The secondary maximum in Type Ia supernovae Open
Type Ia supernova (SN Ia) light curves have a secondary maximum that exists in the $r$, $i$, and near-infrared filters. The secondary maximum is relatively weak in the $r$ band, but holds the advantage that it is accessible, even at high r…
View article: ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments
ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments Open
The unprecedented statistics of detected Type Ia supernovae (SNe Ia) brought by the Zwicky Transient Facility enables us to probe the impact of the Large-Scale Structure on the properties of these objects. The goal of this paper is to expl…
View article: ZTF SN Ia DR2: Evidence of Changing Dust Distributions With Redshift Using Type Ia Supernovae
ZTF SN Ia DR2: Evidence of Changing Dust Distributions With Redshift Using Type Ia Supernovae Open
Type Ia supernova (SNIa) are excellent probes of local distance, and the increasing sample sizes of SNIa have driven an increased need to study the associated systematic uncertainties and improve the standardisation methods in preparation …
View article: ZTF SN Ia DR2: Study of Type Ia Supernova lightcurve fits
ZTF SN Ia DR2: Study of Type Ia Supernova lightcurve fits Open
Type Ia supernova (SN Ia) cosmology relies on the estimation of lightcurve parameters to derive precision distances that leads to the estimation of cosmological parameters. The empirical SALT2 lightcurve modeling that relies on only two pa…
View article: ZTF SN Ia DR2: Colour standardisation of Type Ia Supernovae and its dependence on environment
ZTF SN Ia DR2: Colour standardisation of Type Ia Supernovae and its dependence on environment Open
As type Ia supernova (SN Ia) cosmology transitions from a statistics-dominated to a systematics-dominated era, it is crucial to understand the remaining unexplained uncertainties that affect their luminosity, such as those stemming from as…