Daniel M. Scolnic

Rapidly evolving transients discovered by DES

Perry P. Wiseman, M. Pursiainen, Michael J. Childress, Swann E et autres

gb, us, au, fr, cl, br, es, it, de (code pays fourni par la source)

Forward-modelling Milky Way Cepheids: selection effects and physical priors in the Gaia – HST calibration

Richard Stiskalek, Adam G. Riess, Harry Desmond, Guilhem Lavaux et autres

ABSTRACT The advent of high-precision Gaia parallaxes for Milky Way Cepheids enables percent-level calibration of the local distance ladder and the Hubble constant $H_0 $. We revisit the Milky Way Cepheid calibration from Gaia EDR3 parallaxes using a fully forward-modelled Bayesian framework …

gb, us, fr (code pays fourni par la source)

Flux Cube Reconstruction from Slitless Spectroscopy

M. Griggio, Russell E. Ryan, Nor Pirzkal, T. Astraatmadja et autres

Abstract Slitless spectroscopy enables efficient, large-area surveys without target preselection, yet it faces challenges from source blending, higher noise, and lost spatial–spectral information. We present an advanced, nonparametric, data-driven algorithm that leverages multiple dispersion angles to reconstruct three-dimensional flux distributions, providing low-resolution …

us, es, ro (code pays fourni par la source)

The Extinction Law in Type Ia Supernovae Hosts from Background Galaxy Measurements: Toward a 1% Determination of H 0

Yukei S. Murakami, Adam G. Riess, Henry C. Ferguson, A. V. Filippenko et autres

Abstract In the most precise distance ladder determination of H 0 , the observed near-infrared fluxes of Cepheids are corrected for dust, assuming that the extinction law in large, star-forming spiral hosts of Type Ia supernovae (SNe Ia) is similar to the …

us (code pays fourni par la source)

TITAN DR1: An Improved, Validated, and Systematically Controlled Recalibration of ATLAS Photometry toward Type Ia Supernova Cosmology

Elijah G. Marlin, Yukei S. Murakami, Dillon Brout, J. W. Tweddle et autres

Abstract ATLAS (Asteroid Terrestrial Last Alert System) is a time-domain survey using four telescopes, covering the entire sky. It has observed 8378 spectroscopically confirmed Type Ia supernovae (SNe Ia), with thousands of cosmology-grade light curves (to be released as TITAN DR1). To …

us, gb (code pays fourni par la source)

Still accelerating: type Ia supernova cosmology is robust to host galaxy age evolution

Perry P. Wiseman, B Popovic, Mark Sullivan, Adam G. Riess et autres

ABSTRACT Type Ia supernovae are a cornerstone of modern cosmology, providing first evidence for cosmic acceleration and new tests of dark energy. Son et al. (S25) claim a strong redshift evolution in standardized supernova luminosities driven by supernova progenitor age, with dramatic …

gb, us, fr, au, es, ru (code pays fourni par la source)

NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1)

Colin Orion Chandler, Pedro H. Bernardinelli, Mario Jurić, Devanshi Singh et autres

Abstract We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS) with the NSF-DOE Vera C. Rubin Observatory. Comet 3I/ATLAS, the third known interstellar object, was discovered on UT …

us, fr, cl, ru, gb, it, ch, nz, fi, ca, nl, hu, br (code pays fourni par la source)

Measuring the Distances to Asteroids from One Observatory in One Night with Upcoming All-sky Telescopes

Daniel M. Scolnic, Erik R. Peterson, Chengxing Zhai, T. Linder et autres

Abstract Upcoming telescopes like the Vera Rubin Observatory and the Argus Array will image large fractions of the sky multiple times per night, yielding numerous near-Earth object (NEO) discoveries. When asteroids are measured with short observation time windows, the dominant uncertainty in …

us, hk (code pays fourni par la source)

The Dark Energy Survey supernova program: a reanalysis of cosmology results and evidence for evolving dark energy with an updated Type Ia supernova calibration

B Popovic, P Shah, W. D. Kenworthy, R Kessler et autres

ABSTRACT We present improved cosmological constraints from a re-analysis of the Dark Energy Survey (DES) 5-year sample of Type Ia supernovae (DES-SN5YR). This re-analysis includes an improved photometric cross-calibration, recent white dwarf observations to cross-calibrate between DES and low-redshift surveys, retraining the …

fr, gb, se, us, au, ru, es, ch, de, br, ca, cl, it (code pays fourni par la source)

Initial Characterization of Stellar Photometry of Roman Images from the OpenUniverse Simulations

Lauren Aldoroty, Daniel M. Scolnic, Arun Kannawadi, Rob A. Knop et autres

Abstract NASA’s Nancy Grace Roman Space Telescope (Roman) will provide an opportunity to study dark energy with unprecedented precision and accuracy using several techniques, including measurements of high- z Type Ia Supernovae (SNe Ia; z ≲ 3.0) via the High-Latitude Time Domain …

Dark Energy Survey: Implications for cosmological expansion models from the final DES baryon acoustic oscillation and supernova data

T. Abbott, M. Acevedo, M. Adamów, M. Aguena et autres

International audience

us, br, es, ch, au, gb, mx, de, it, kr, in, fr, ca, uz, se (code pays fourni par la source)

TITAN DR1: An Improved, Validated, and Systematically-Controlled Recalibration of ATLAS Photometry toward Type Ia Supernova Cosmology

Elijah G. Marlin, Yukei S. Murakami, Dillon Brout, Jack W. Tweddle et autres

ATLAS (Asteroid Terrestrial Last Alert System) is a time-domain survey using four telescopes, covering the entire sky. It has observed over 10,000 spectroscopically confirmed Type Ia supernovae (SNe~Ia), with thousands of cosmology-grade light curves (to be released as TITAN DR1). To prepare …