Showing 2024 · astro-ph.IMShow all

26 papers · 2 filters

astro-ph.IM2024★ 2 cited

Long-term stability of scientific X-ray CMOS detectors

Mingjun Liu, Qinyu Wu, Zhixing Ling +3

In recent years, complementary metal-oxide-semiconductor (CMOS) sensors have been demonstrated to have significant potential in X-ray astronomy, where long-term reliability is cruc…

astro-ph.IM2024★ 8 cited

HiFAST: An HI Data Calibration and Imaging Pipeline for FAST III. Standing Wave Removal

Chen Xu, Jie Wang, Yingjie Jing +13

The standing waves existed in radio telescope data are primarily due to reflections among the instruments, which significantly impact the spectrum quality of the Five-hundred-meter…

astro-ph.IM2024★ 4 cited

AKRA 2.0: Accurate Kappa Reconstruction Algorithm for masked shear catalog

Yuan Shi, Pengjie Zhang, Furen Deng +4

Cosmic shear surveys serve as a powerful tool for mapping the underlying matter density field, including non-visible dark matter. A key challenge in cosmic shear surveys is the acc…

astro-ph.IM2024★ 30 cited

First Very Long Baseline Interferometry Detections at 870μm

Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada +276

The first very long baseline interferometry (VLBI) detections at 870m wavelength (345GHz frequency) are reported, achieving the highest diffraction-limited angular resolutio…

astro-ph.IM2024★ 3 cited

Performance of the Segment Anything Model in Various RFI/Events Detection in Radio Astronomy

Yanbin Yang, Feiyu Zhao, Ruxi Liang +4

The emerging era of big data in radio astronomy demands more efficient and higher-quality processing of observational data. While deep learning methods have been applied to tasks s…

astro-ph.IM2024★ 1 cited

A Multi-station Meteor Monitoring (M) System. I. Design and Testing

Z. Li, H. Zou, J. Liu +8

Meteors carry important and indispensable information about the interplanetary environment, which can be used to understand the origin and evolution of our solar system. We have de…

astro-ph.IM2024

An evaluation of source-blending impact on the calibration of SKA EoR experiments

Chenxi Shan, Haiguang Xu, Yongkai Zhu +8

Twenty-one-centimetre signals from the Epoch of Reionization (EoR) are expected to be detected in the low-frequency radio window by the next-generation interferometers, particularl…

astro-ph.IM2024★ 33 cited

Selective Dynamical Imaging of Interferometric Data

Joseph Farah, Peter Galison, Kazunori Akiyama +16

Recent developments in very long baseline interferometry (VLBI) have made it possible for the Event Horizon Telescope (EHT) to resolve the innermost accretion flows of the largest…

astro-ph.IM2024★ 2 cited

NEW-MUSIC: The Next-generation Extended-Wavelength Multiband Sub/millimeter Inductance Camera

Sunil R. Golwala, Andrew D. Beyer, Daniel Cunnane +9

The Next-generation Extended Wavelength-MUltiband Sub/millimeter Inductance Camera (NEW-MUSIC) on the Leighton Chajnantor Telescope (LCT) will be a first-of-its-kind, six-band, tra…

astro-ph.IM2024★ 2 cited

The Velocity Aberration Effect of the CSST Main Survey Camera

Hui-Mei Feng, Zi-Huang Cao, Man I Lam +9

In this study, we conducted simulations to find the geometric aberrations expected for images taken by the Main Survey Camera (MSC) of the Chinese Space Station Telescope (CSST) du…

astro-ph.IM2024★ 20 cited

The FAST Core Array

Peng Jiang, Rurong Chen, Hengqian Gan +8

The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) Core Array is a proposed extension of FAST, integrating 24 secondary 40-m antennas implanted within 5 km of the FAS…

astro-ph.IM2024★ 3 cited

The Electrical Design of a Membrane Antenna for Lunar-based Low-frequency Radio Telescope

Suonanben, Fengquan Wu, Kai He +15

Detecting primordial fluctuations from the cosmic dark ages requires extremely large low-frequency radio telescope arrays deployed on the far side of the Moon. The antenna of such…

astro-ph.IM2024★ 6 cited

GRANDlib: A simulation pipeline for the Giant Radio Array for Neutrino Detection (GRAND)

GRAND Collaboration, Rafael Alves Batista, Aurélien Benoit-Lévy +112

The operation of upcoming ultra-high-energy cosmic-ray, gamma-ray, and neutrino radio-detection experiments, like the Giant Radio Array for Neutrino Detection (GRAND), poses signif…

astro-ph.IM2024★ 5 cited

X-ray Sources Classification Using Machine Learning: A Study with EP-WXT Pathfinder LEIA

Xiaoxiong Zuo, Yihan Tao, Yuan Liu +7

X-ray observations play a crucial role in time-domain astronomy. The Einstein Probe (EP), a recently launched X-ray astronomical satellite, emerges as a forefront player in the fie…

astro-ph.IM2024★ 7 cited

Deep learning interpretability analysis for carbon star identification in Gaia DR3

Shuo Ye, Wen-Yuan Cui, Yin-Bi Li +2

Context. A large fraction of Asymptotic Giant Branch (AGB) stars develop carbon-rich atmospheres during their evolution. Based on their color and luminosity, these carbon stars can…

astro-ph.IM2024

Correcting Turbulence-induced Errors in Fiber Positioning for the Dark Energy Spectroscopic Instrument

E. F. Schlafly, J. Guy, K. Honscheid +37

Highly-multiplexed, robotic, fiber-fed spectroscopic surveys are observing tens of millions of stars and galaxies. For many systems, accurate positioning relies on imaging the fibe…

astro-ph.IM2024★ 4 cited

All-sky Guide Star Catalog for CSST

Hui-Mei Feng, Zi-Huang Cao, Man I Lam +17

The China Space Station Telescope (CSST) is a two-meter space telescope with multiple back-end instruments. The Fine Guidance Sensor (FGS) is an essential subsystem of the CSST Pre…

astro-ph.IM2024★ 3 cited

Forecast measurement of the 21 cm global spectrum from Lunar orbit with the Vari-Zeroth-Order Polynomial (VZOP) method

Tianyang Liu, Jiajun Zhang, Yuan Shi +7

The cosmic 21 cm signal serves as a crucial probe for studying the evolutionary history of the Universe. However, detecting the 21 cm signal poses significant challenges due to its…

astro-ph.IM2024★ 10 cited

HiFAST : An HI Data Calibration and Imaging Pipeline for FAST II. Flux Density Calibration

Ziming Liu, Jie Wang, Yingjie Jing +6

Accurate flux density calibration is essential for precise analysis and interpretation of observations across different observation modes and instruments. In this research, we firs…

astro-ph.IM2024★ 10 cited

Calibration Error in 21-centimeter Global Spectrum Experiments

Shijie Sun, Eloy de Lera Acedo, Fengquan Wu +3

The redshifted 21 cm line signal is a powerful probe of the cosmic dawn and the epoch of reionization. The global spectrum can potentially be detected with a single antenna and spe…

astro-ph.IM2024★ 3 cited

A fast photometric image alignment algorithm with row and column means

Jie Zheng, Linqiao Jiang, Jianfeng Tian

This paper introduces an astronomical image alignment algorithm. This algorithm uses the means of the rows and columns of the original image for alignment, and finds the optimal of…

astro-ph.IM2024★ 13 cited

LHAASO-KM2A detector simulation using Geant4

Zhen Cao, F. Aharonian, Q. An +275

KM2A is one of the main sub-arrays of LHAASO, working on gamma ray astronomy and cosmic ray physics at energies above 10 TeV. Detector simulation is the important foundation for es…

astro-ph.IM2024★ 8 cited

Deep Learning and LLM-based Methods Applied to Stellar Lightcurve Classification

Yu-Yang Li, Yu Bai, Cunshi Wang +4

Light curves serve as a valuable source of information on stellar formation and evolution. With the rapid advancement of machine learning techniques, it can be effectively processe…

astro-ph.IM2024★ 19 cited

Large-scale Array for Radio Astronomy on the Farside

Xuelei Chen, Feng Gao, Fengquan Wu +20

At the Royal Society meeting in 2023, we have mainly presented our lunar orbit array concept called DSL, and also briefly introduced a concept of a lunar surface array, LARAF. As t…