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We present complimentary techniques to find emission-line targets and measure their properties in a semi-automated fashion from grism observations obtained with the Advanced Camera for Surveys aboard the Hubble Space Telescope. The first…

We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3um and 2.4um. These include data taken on the Subaru 8.3m telescope, the KPNO and CTIO 4m telescopes, and the CFHT 3.6m telescope. Special…

We study the star cluster population of NGC 2997, a giant spiral galaxy located at 9.5 Mpc and targeted by the Snapshot Hubble U-band Cluster Survey (SHUCS). Combining our U-band imaging from SHUCS with archival BVI imaging from HST, we…

Gravitational lensing by galaxy clusters involves hundreds of galaxies over a large redshift range and increases the likelihood of rare phenomena (supernovae, dark substructures, etc.). We present the detailed analysis of \elanz, a…

星系天体物理 · 物理学 2024-10-10 A. Galan , G. B. Caminha , J. Knollmüller , J. Roth , S. H. Suyu

We present the photometric analysis of the external regions of three Galactic Globular Clusters: NGC 6121, NGC 6397 and NGC 6752. The main goal is the characterization of the multiple stellar populations along the main sequence (MS) and the…

太阳与恒星天体物理 · 物理学 2014-12-24 D. Nardiello , A. P. Milone , G. Piotto , A. F. Marino , A. Bellini , S. Cassisi

Accurate segmentation and classification of brain tumors from Magnetic Resonance Imaging (MRI) remain key challenges in medical image analysis, primarily due to the lack of high-quality, balanced, and diverse datasets with expert…

图像与视频处理 · 电气工程与系统科学 2026-01-29 Amirreza Fateh , Yasin Rezvani , Sara Moayedi , Sadjad Rezvani , Fatemeh Fateh , Mansoor Fateh , Vahid Abolghasemi

We present results from a spectroscopic study of ~4000 galaxies in a 6.2 square degree field in the direction of the Aquarius supercluster and a smaller typical field region in Cetus, down to R<19.5. Galaxy redshifts were measured using the…

天体物理学 · 物理学 2009-11-10 R. E. Smith , H. Dahle , S. J. Maddox , P. B. Lilje

In preparation to make the most of our own planned James Webb Space Telescope investigations, we take advantage of publicly available calibration and early-science observations to independently derive and test a geometric-distortion…

天体物理仪器与方法 · 物理学 2023-03-29 M. Griggio , D. Nardiello , L. R. Bedin

We present a proof of concept for mining JWST imaging data for anomalous galaxy populations using a conditional Generative Adversarial Network (cGAN). We train our model to predict long wavelength NIRcam fluxes (LW: F277W, F356W, F444W…

宇宙学与河外天体物理 · 物理学 2023-10-16 Ruby Pearce-Casey , Hugh Dickinson , Stephen Serjeant , Jane Bromley

Understanding star formation in resolved low mass systems requires the integration of information obtained from observations at different wavelengths. We have combined new and archival multi-wavelength observations on a set of 20 nearby…

星系天体物理 · 物理学 2018-11-12 Kristen B. W. McQuinn , Noah P. Mitchell , Evan D. Skillman

The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a z'-passband imaging survey of the 50 deg^2 Spitzer SWIRE Legacy fields, designed with the primary aim of creating the first large, homogeneously selected sample of…

宇宙学与河外天体物理 · 物理学 2015-05-18 Ricardo Demarco , Gillian Wilson , Adam Muzzin , Mark Lacy , Jason Surace , H. K. C. Yee , Henk Hoekstra , Kris Blindert , David Gilbank

The past decade has seen impressive progress in the detection of $z>7$ galaxies with the Hubble Space Telescope, however little is known about their properties. The James Webb Space Telescope will revolutionise the high-$z$ field by…

A public release of slitless spectra, obtained with ACS/WFC and the G800L grism, is presented. Spectra were automatically extracted in a uniform way from 153 archival fields (or "associations") distributed across the two Galactic caps,…

宇宙学与河外天体物理 · 物理学 2015-05-27 M. Kuemmel , P. Rosati , R. Fosbury , J. Haase , R. N. Hook , H. Kuntschner , M. Lombardi , A. Micol , K. K. Nilsson , F. Stoehr , J. R. Walsh

During the last decade, hyperspectral images have attracted increasing interest from researchers worldwide. They provide more detailed information about an observed area and allow an accurate target detection and precise discrimination of…

计算机视觉与模式识别 · 计算机科学 2022-10-26 Asma Elmaizi , Hasna Nhaila , Elkebir Sarhrouni , Ahmed Hammouch , Nacir Chafik

We present the spectral atlas of sources observed in low resolution with the Infrared Spectrograph on board the Spitzer Space Telescope. More than 11,000 distinct sources were extracted using a dedicated algorithm based on the SMART…

天体物理仪器与方法 · 物理学 2015-05-30 V. Lebouteiller , D. J. Barry , H. W. W. Spoon , J. Bernard-Salas , G. C. Sloan , J. R. Houck , D. W. Weedman

GALEX, the first all sky imaging UV satellite, has imaged a large part of the sky providing an excellent opportunity for studying UV star counts. The aim of our study is to investigate in detail the observed UV star counts obtained by GALEX…

星系天体物理 · 物理学 2014-05-08 Ananta C. Pradhan , D. K. Ojha , A. C. Robin , S. K. Ghosh , John J. Vickers

We present a strong and weak gravitational lens model of the galaxy cluster MACSJ0416.1-2403, constrained using spectroscopy from the Grism Lens-Amplified Survey from Space (GLASS) and Hubble Frontier Fields (HFF) imaging data. We search…

We report the discovery of five new doubly-imaged lensed quasars from the first 2500 square degrees of the ongoing Canada-France Imaging Survey (CFIS), which is a component of the Ultraviolet Near Infrared Optical Northern Survey (UNIONS),…

The scarcity of high-quality, labelled retinal imaging data, which presents a significant challenge in the development of machine learning models for ophthalmology, hinders progress in the field. Existing methods for synthesising Colour…

图像与视频处理 · 电气工程与系统科学 2025-07-18 Junzhi Ning , Cheng Tang , Kaijing Zhou , Diping Song , Lihao Liu , Ming Hu , Wei Li , Huihui Xu , Yanzhou Su , Tianbin Li , Jiyao Liu , Jin Ye , Sheng Zhang , Yuanfeng Ji , Junjun He