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View article: Microlensing of lensed supernovae Zwicky & iPTF16geu: constraints on the lens galaxy mass slope and dark compact object fraction
Microlensing of lensed supernovae Zwicky & iPTF16geu: constraints on the lens galaxy mass slope and dark compact object fraction Open
To date, only two strongly lensed type Ia supernovae (SNIa) have been discovered with an isolated galaxy acting as the lens: iPTF16geu and SN Zwicky. The observed image fluxes for both lens systems were inconsistent with predictions from a…
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: The axis of systematic bias in SN Ia cosmology and implications for DESI 2024 results
The axis of systematic bias in SN Ia cosmology and implications for DESI 2024 results Open
Relative distances between a high-redshift sample of Type Ia supernovae (SNe Ia), anchored to a low-redshift sample, have been instrumental in drawing insights on the nature of the dark energy driving the accelerated expansion of the unive…
View article: Strongly lensed supernovae: lessons learned
Strongly lensed supernovae: lessons learned Open
For approximately a decade, we have finally entered the era of discoveries of multiply imaged gravitationally lensed supernovae. To date, all cluster-lensed supernovae, very distant, faint and spatially resolved, have been found from space…
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: 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: 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: LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”) with Hubble Space Telescope Template Observations
LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”) with Hubble Space Telescope Template Observations Open
Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We present a follow-up study of one recently discovered strongly…
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: SN H0pe: The First Measurement of <i>H</i> <sub>0</sub> from a Multiply Imaged Type Ia Supernova, Discovered by JWST
SN H0pe: The First Measurement of <i>H</i> <sub>0</sub> from a Multiply Imaged Type Ia Supernova, Discovered by JWST Open
The first James Webb Space Telescope (JWST) Near InfraRed Camera imaging in the field of the galaxy cluster PLCK G165.7+67.0 ( z = 0.35) uncovered a Type Ia supernova (SN Ia) at z = 1.78, called “SN H0pe.” Three different images of this on…
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: 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: Optical and near-infrared photometry of 94 type II supernovae from the Carnegie Supernova Project
Optical and near-infrared photometry of 94 type II supernovae from the Carnegie Supernova Project Open
Type II supernovae (SNeII) mark the endpoint in the lives of hydrogen-rich massive stars. Their large explosion energies and luminosities allow us to measure distances, metallicities, and star formation rates into the distant Universe. To …
View article: Optical and near-infrared photometry of 94 type II supernovae from the Carnegie Supernova Project
Optical and near-infrared photometry of 94 type II supernovae from the Carnegie Supernova Project Open
Context. Type II supernovae (SNe II) mark the endpoint in the lives of hydrogen-rich massive stars. Their large explosion energies and luminosities allow us to measure distances, metallicities, and star formation rates into the distant Uni…
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: The axis of systematic bias in SN~Ia cosmology and implications for DESI 2024 results
The axis of systematic bias in SN~Ia cosmology and implications for DESI 2024 results Open
Relative distances between a high-redshift sample of Type Ia supernovae (SNe~Ia), anchored to a low-redshift sample, have been instrumental in drawing insights on the nature of the dark energy driving the accelerated expansion of the unive…
View article: LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with HST Template Observations
LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with HST Template Observations Open
Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We present a follow-up study of one recently-discovered strongly…
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: 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: Carnegie Supernova Project I and II: Measurements of H <sub>0</sub> Using Cepheid, Tip of the Red Giant Branch, and Surface Brightness Fluctuation Distance Calibration to Type Ia Supernovae*
Carnegie Supernova Project I and II: Measurements of H <sub>0</sub> Using Cepheid, Tip of the Red Giant Branch, and Surface Brightness Fluctuation Distance Calibration to Type Ia Supernovae* Open
We present an analysis of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project I and II and extend the Hubble diagram from optical to near-infrared wavelengths ( uBgVriYJH ). We calculate the Hubble constant, H 0 , using various…
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: Strongly lensed supernovae: lessons learned
Strongly lensed supernovae: lessons learned Open
Since about a decade, we have finally entered the era of discoveries of multiply-imaged gravitationally lensed supernovae. To date, all cluster lensed supernovae, very distant, faint and spatially resolved, have been found from space. In c…
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 …