F. Feinstein
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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: Generalized framework for likelihood-based field-level inference of growth rate from velocity and density fields
Generalized framework for likelihood-based field-level inference of growth rate from velocity and density fields Open
Measuring the growth rate of large-scale structures ( f ) as a function of redshift has the potential to break degeneracies between modified gravity and dark energy models, when combined with expansion-rate probes. Direct estimates of pecu…
View article: StarDICE III: Characterization of the photometric instrument with a Collimated Beam Projector
StarDICE III: Characterization of the photometric instrument with a Collimated Beam Projector Open
The measurement of Type Ia supernovae magnitudes provides cosmological distances, which constrain dark energy parameters. Current and upcoming large photometric surveys require improved photometric calibration precision to reduce systemati…
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: 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: Generalized framework for likelihood-based field-level inference of growth rate from velocity and density fields
Generalized framework for likelihood-based field-level inference of growth rate from velocity and density fields Open
Measuring the growth rate of large-scale structures (f) as a function of redshift has the potential to break degeneracies between modified gravity and dark energy models, when combined with expansion-rate probes. Direct estimates of peculi…
View article: Cyclotron emitting magnetic white dwarfs in post common envelope binaries discovered with the Zwicky Transient Facility
Cyclotron emitting magnetic white dwarfs in post common envelope binaries discovered with the Zwicky Transient Facility Open
We present the discovery of 14 new (and recovery of 4 known) low accretion rate magnetic white dwarfs in post-common envelope binaries that emit strong cyclotron emission using the Zwicky Transient Facility (ZTF) light curves, doubling the…
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: How the StarDICE photometric calibration of standard stars can improve cosmological constraints?
How the StarDICE photometric calibration of standard stars can improve cosmological constraints? Open
The number of type Ia supernova (SNe Ia) observations will grow significantly within the next decade, mainly thanks to the Legacy Survey of Space and Time (LSST) undertaken by the Vera Rubin Observatory in Chile. With this improvement, sta…
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: ZTF SN Ia DR2: Peculiar velocities’ impact on the Hubble diagram
ZTF SN Ia DR2: Peculiar velocities’ impact on the Hubble diagram Open
Type Ia supernovae (SNe Ia) are used to determine the distance-redshift relation and build the Hubble diagram. Neglecting their host-galaxy peculiar velocities (PVs) may bias the measurement of cosmological parameters. The smaller the reds…
View article: StarDICE II: Calibration of an Uncooled Infrared Thermal Camera for Atmospheric Gray Extinction Characterization
StarDICE II: Calibration of an Uncooled Infrared Thermal Camera for Atmospheric Gray Extinction Characterization Open
The StarDICE experiment strives to establish an instrumental metrology chain with a targeted accuracy of 1 mmag in griz bandpasses to meet the calibration requirements of next-generation cosmological surveys. Atmospheric transmission is a …
View article: StarDICE II: calibration of an uncooled infrared thermal camera for atmospheric gray extinction characterization
StarDICE II: calibration of an uncooled infrared thermal camera for atmospheric gray extinction characterization Open
The StarDICE experiment strives to establish an instrumental metrology chain with a targeted accuracy of 1 mmag in griz bandpasses to meet the calibration requirements of next-generation cosmological surveys. Atmospheric transmission stand…
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: StarDICE: a photometric calibration experiment to anchor standard stars on the NIST flux scale at the milli-magnitude level
StarDICE: a photometric calibration experiment to anchor standard stars on the NIST flux scale at the milli-magnitude level Open
International audience
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…
View article: Growth-rate measurement with type-Ia supernovae using ZTF survey simulations
Growth-rate measurement with type-Ia supernovae using ZTF survey simulations Open
Measurements of the growth rate of structures at z < 0.1 with peculiar velocity surveys have the potential of testing the validity of general relativity on cosmic scales. In this work, we present growth-rate measurements from realistic sim…
View article: Growth-rate measurement with type-Ia supernovae using ZTF survey simulations
Growth-rate measurement with type-Ia supernovae using ZTF survey simulations Open
Measurements of the growth rate of structures at $z < 0.1$ with peculiar velocity surveys have the potential of testing the validity of general relativity on cosmic scales. In this work, we present growth-rate measurements from realistic s…
View article: StarDICE
StarDICE Open
Context . The Hubble diagram of type-Ia supernovae (SNe-Ia) provides cosmological constraints on the nature of dark energy with an accuracy limited by the flux calibration of currently available spectrophotometric standards. This motivates…
View article: StarDICE I: sensor calibration bench and absolute photometric calibration of a Sony IMX411 sensor
StarDICE I: sensor calibration bench and absolute photometric calibration of a Sony IMX411 sensor Open
The Hubble diagram of type-Ia supernovae (SNe-Ia) provides cosmological constraints on the nature of dark energy with an accuracy limited by the flux calibration of currently available spectrophotometric standards. The StarDICE experiment …
View article: Measurement of telescope transmission using a Collimated Beam Projector
Measurement of telescope transmission using a Collimated Beam Projector Open
The number of type Ia supernova observations will see a significant growth within the next decade, especially thanks to the Legacy Survey of Space and Time undertaken by the Vera Rubin Observatory in Chile. With this rise, the statistical …
View article: The detection efficiency of Type Ia supernovae from the Zwicky Transient Facility: limits on the intrinsic rate of early flux excesses
The detection efficiency of Type Ia supernovae from the Zwicky Transient Facility: limits on the intrinsic rate of early flux excesses Open
Samples of young Type Ia supernovae have shown ‘early excess’ emission in a few cases. Similar excesses are predicted by some explosion and progenitor scenarios and hence can provide important clues regarding the origin of thermonuclear su…
View article: Detailed spectral and morphological analysis of the shell type SNR RCW 86
Detailed spectral and morphological analysis of the shell type SNR RCW 86 Open
Aims: We aim for an understanding of the morphological and spectral properties of the supernova remnant RCW~86 and for insights into the production mechanism leading to the RCW~86 very high-energy gamma-ray emission. Methods: We analyzed H…
View article: THE 2012 FLARE OF PG 1553+113 SEEN WITH H.E.S.S. AND<i>FERMI</i>-LAT
THE 2012 FLARE OF PG 1553+113 SEEN WITH H.E.S.S. AND<i>FERMI</i>-LAT Open
Very high energy (VHE, E > 100 GeV) γ-ray flaring activity of the high-frequency peaked BL Lac object PG 1553+113 has been detected by the H.E.S.S. telescopes. The flux of the source increased by a factor of 3 during the nights of 2012 Apr…