S. Schuldt

Discovering Strong Gravitational Lenses in the Dark Energy Survey with Interactive Machine Learning and Crowd-sourced Inspection with Space Warps

J. González, Paul H. Holloway, Thomas E. Collett, A. Verma et autres

Abstract We conduct a search for strong gravitational lenses in the Dark Energy Survey (DES) Year 6 imaging data. We implement a pre-trained Vision Transformer (ViT) for our machine learning (ML) architecture and adopt interactive machine learning to construct a training sample …

us, gb, jp, in, cl, it, Afrique du Sud, ch, nl, br, es, de, fr, au (code pays fourni par la source)

HOLISMOKES

Satadru Bag, R. Cañameras, S. H. Suyu, S. Schuldt et autres

Strong gravitationally lensed supernovae (LSNe), though rare, are exceptionally valuable probes for cosmology and astrophysics. Upcoming time-domain surveys such as the Vera Rubin Observatory’s Legacy Survey of Space and Time (LSST) offer a major opportunity to discover large number of LSNe. Early …

de, fr, it (code pays fourni par la source)

Euclid Quick Data Release (Q1)

P. Bergamini, M. Meneghetti, A. Acebron, B. Clément et autres

We present the first catalogue of strong-lensing galaxy clusters identified in the Euclid Quick Release 1 observations (covering 63.1 deg 2 ). This catalogue is the result of the visual inspection of 1260 Euclid image cutouts of previously identified galaxy clusters. Each …

it, es, cz, ch, fr, us, nl, sk, de, gb, be, jp, at, cn, pt (code pays fourni par la source)

Cosmology with supernova Encore in the strong lensing cluster MACS J0138-2155: Time delays & Hubble constant measurement

Justin Pierel, Erin E. Hayes, Martin Millon, C. Larison et autres

Multiply-imaged supernovae (SNe) provide a novel means of constraining the Hubble constant ($H_0$). Such measurements require a combination of precise models of the lensing mass distribution and an accurate estimate of the relative time delays between arrival of the multiple images. Only …

Euclid : Finding strong gravitational lenses in the early release observations using convolutional neural networks

B.C Nagam, J.A. Acevedo Barroso, J. Wilde, I.T Andika et autres

Several new galaxy-galaxy strong gravitational lenses have been detected in the early release observations (ERO) from Euclid . The all-sky survey is expected to find 170 000 new systems, which are expected to greatly enhancing studies of dark matter and dark energy, …

us, nl, sk, ch, es, de, gb, it, ca, fr, jp, br, pt, in, no (code pays fourni par la source)

Cosmology with supernova Encore in the strong lensing cluster MACS J0138−2155

S. Ertl, S. H. Suyu, S. Schuldt, G. Granata et autres

The strongly lensed supernova (SN) Encore, at a redshift of z = 1.949 and discovered behind the galaxy cluster MACS J0138−2155 at z = 0.336, provides a rare opportunity for time-delay cosmography and studies of the SN host galaxy, where previously another …

de, it, gb, es, fr, kr, rs, jp, Nigéria, us, il (code pays fourni par la source)

Euclid Quick Data Release (Q1)

T.E Collett, J.A. Acevedo Barroso, J.W Nightingale, Daniel Stern et autres

We present a search for strong gravitational lenses in Euclid imaging with a high stellar velocity dispersion ( σ v > 180 km s −1 ) reported by SDSS and DESI. We performed expert visual inspection and classification of 11 660 Euclid …

ch, gb, us, it, de, ca, au, es, fr, hu, be, Afrique du Sud, ru, sk, pt, nl, no (code pays fourni par la source)

HOLISMOKES

S. Schuldt, R. Cañameras, Y. Shu, I.T Andika et autres

We have carried out a systematic search for galaxy-scale lenses exploiting multiband imaging data from the third public data release of the Hyper Suprime-Cam (HSC) survey with the focus on false-positive removal, after applying deep learning classifiers to all ~110 million sources …

it, fr, cn, de (code pays fourni par la source)

Lens Modeling of STRIDES Strongly Lensed Quasars Using Neural Posterior Estimation

Sebastian Wagner-Carena, Philip J. Marshall, Martin Millon, Simon Birrer et autres

Abstract Strongly lensed quasars can be used to constrain cosmological parameters through time-delay cosmography. Models of the lens masses are a necessary component of this analysis. To enable time-delay cosmography from a sample of O ( 1 0 3 ) lenses, which …

Cosmology with supernova Encore in the strong lensing cluster MACS J0138−2155

G. Granata, G. B. Caminha, S. Ertl, C. Grillo et autres

We present a comprehensive spectroscopic analysis of MACS J0138−2155, at z = 0.336. It is the first galaxy cluster known to host two strongly lensed supernovae (SNe), Requiem and Encore, and thus provides us with a chance to obtain a reliable H0 …

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

J1721+8842: The first Einstein zigzag lens

Frédéric Dux, Martin Millon, Christopher Lemon, T. Schmidt et autres

We report the discovery of the first example of an Einstein zigzag lens, an extremely rare lensing configuration. In this system, J1721+8842, six images of the same background quasar are formed by two intervening galaxies, one at redshift z 1 = 0.184 …

cl, ch, us, se, es, jp, dk, gb, de, it, be (code pays fourni par la source)

Euclid: Finding strong gravitational lenses in the Early Release Observations using convolutional neural networks

B.C Nagam, J.A. Acevedo Barroso, J. Wilde, I.T Andika et autres

The Early Release Observations (ERO) from Euclid have detected several new galaxy-galaxy strong gravitational lenses, with the all-sky survey expected to find 170,000 new systems, greatly enhancing studies of dark matter, dark energy, and constraints on the cosmological parameters. As a first …

fr (code pays fourni par la source)