Showing 2022 · astro-ph.IMShow all

32 papers · 2 filters

astro-ph.IM2022★ 10 cited

Galaxy Image Classification using Hierarchical Data Learning with Weighted Sampling and Label Smoothing

Xiaohua Ma, Xiangru Li, Ali Luo +2

With the development of a series of Galaxy sky surveys in recent years, the observations increased rapidly, which makes the research of machine learning methods for galaxy image re…

astro-ph.IM2022★ 12 cited

Ultra-Low-Frequency Radio Astronomy Observations from a Selenocentric Orbit: first results of the Longjiang-2 experiment

Jingye Yan, Ji Wu, Leonid I. Gurvits +17

This paper introduces the first results of observations with the Ultra-Long-Wavelength (ULW) -- Low Frequency Interferometer and Spectrometer (LFIS) on board the selenocentric sate…

astro-ph.IM2022★ 10 cited

Target Detection Framework for Lobster Eye X-Ray Telescopes with Machine Learning Algorithms

Peng Jia, Wenbo Liu, Yuan Liu +1

Lobster eye telescopes are ideal monitors to detect X-ray transients, because they could observe celestial objects over a wide field of view in X-ray band. However, images obtained…

astro-ph.IM2022★ 18 cited

Photometric redshift estimation of galaxies in the DESI Legacy Imaging Surveys

Changhua Li, Yanxia Zhang, Chenzhou Cui +14

The accurate estimation of photometric redshifts plays a crucial role in accomplishing science objectives of the large survey projects. The template-fitting and machine learning ar…

astro-ph.IM2022

Estimation of Solar Observations with the Five-hundred-meter Aperture Spherical Radio Telescope (FAST)

Lei Qian, Zhichen Pan, Hongfei Liu +7

We present the estimation of the solar observation with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). For both the quite Sun and the Sun with radio bursts, when…

astro-ph.IM2022

Searching for pulsars with phase characteristics

Bo Peng, Qian-Chen Hu, Qiang Li +4

We present a method by using the phase characteristics of radio observation data for pulsar search and candidate identification. The phase characteristics are relations between the…

astro-ph.IM2022★ 24 cited

CATCH: Chasing All Transients Constellation Hunters Space Mission

Panping Li, Qian-Qing Yin, Zhengwei Li +34

In time-domain astronomy, a substantial number of transients will be discovered by multi-wavelength and multi-messenger observatories, posing a great challenge for follow-up capabi…

astro-ph.IM2022★ 1 cited

A comparative study on different background estimation methods for extensive air shower arrays

Yan-Jin Wang, Min Zha, Shi-Cong Hu +3

Background estimation is essential when studying TeV gamma-ray astronomy for extensive air shower arrays. In this work, by applying four applying four different methods including e…

astro-ph.IM2022★ 14 cited

Detection of Strongly Lensed Arcs in Galaxy Clusters with Transformers

Peng Jia, Ruiqi Sun, Nan Li +4

Strong lensing in galaxy clusters probes properties of dense cores of dark matter halos in mass, studies the distant universe at flux levels and spatial resolutions otherwise unava…

astro-ph.IM2022★ 263 cited

CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results

Micaela B. Bagley, Steven L. Finkelstein, Anton M. Koekemoer +34

We present the data release and data reduction process for the Epoch 1 NIRCam observations for the Cosmic Evolution Early Release Science Survey (CEERS). These data consist of NIRC…

astro-ph.IM2022★ 4 cited

The estimation of far-field wavefront error of tilt-to-length distortion coupling in space-based gravitational wave detection

Ya-Zheng Tao, Hong-Bo Jin, Yue-Liang Wu

In space-based gravitational wave detection, the estimation of far-field wavefront error of the distorted beam is the precondition for the noise reduction. Zernike polynomials is u…

astro-ph.IM2022★ 1 cited

Spot size estimation of flat-top beams in space-based gravitational wave detectors

Zhen-Xiang Hao, Tim Haase, Hong-Bo Jin +4

Motivated by the necessity of a high-quality stray light control in the detection of the gravitational waves in space, the spot size of a flat top beam generated by the clipping of…

astro-ph.IM2022★ 7 cited

A Fast Transient Backend to Detect FRBs with the Tianlai Dish Pathfinder Array

Zijie Yu, Furen Deng, Shijie Sun +11

The Tianlai Dish Pathfinder array is a radio interferometer array consisting of 16 six meter dish antennas. The original digital backend integration time is at the seconds level, d…

astro-ph.IM2022★ 20 cited

X-ray performance of a customized large-format scientifc CMOS detector

Qinyu Wu, Zhenqing Jia, Wenxin Wang +4

In recent years, the performance of Scientifc Complementary Metal Oxide Semiconductor (sCMOS) sensors has been improved signifcantly. Compared with CCD sensors, sCMOS sensors have…

astro-ph.IM2022★ 240 cited

The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument

J. Guy, S. Bailey, A. Kremin +55

We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and qu…

astro-ph.IM2022★ 3 cited

A New Position Calibration Method for MUSER Images

Zhichao Zhou, Yihua Yan, Linjie Chen +2

The Mingantu Spectral Radioheliograph (MUSER), a new generation of solar dedicated radio imaging-spectroscopic telescope, has realized high-time, high-angular, and high-frequency r…

astro-ph.IM2022

A Study on Non-coplanar Baseline Effects for Mingantu Spectral Radioheliograph

Qiu-ping Yang, Feng Wang, Hui Deng +2

As a dedicated solar radioheliograph, the MingantU SpEctral RadioHeliograph (MUSER) has a maximum baseline of more than 3000 meters and a frequency range of 400 MHz -- 15 GHz. Acco…

astro-ph.IM2022★ 150 cited

The Target-selection Pipeline for the Dark Energy Spectroscopic Instrument

Adam D. Myers, John Moustakas, Stephen Bailey +51

In 2021 May, the Dark Energy Spectroscopic Instrument (DESI) began a 5 yr survey of approximately 50 million total extragalactic and Galactic targets. The primary DESI dark-time ta…

astro-ph.IM2022★ 20 cited

J-comb: An image fusion algorithm to combine observations covering different spatial frequency ranges

Sihan Jiao, Yuxin Lin, Xiangyu Shui +3

Ground-based, high-resolution bolometric (sub)millimeter continuum mapping observations on spatially extended target sources are often subject to significant missing fluxes. This h…

astro-ph.IM2022★ 12 cited

Estimating Atmospheric Parameters from LAMOST Low-Resolution Spectra with Low SNR

Xiangru Li, Si Zeng, Zhu Wang +3

Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) acquired tens of millions of low-resolution stellar spectra. The large amount of the spectra result in the urgenc…

astro-ph.IM2022★ 2 cited

Antarctic Survey Telescope 3-3: Overview, System Performance and Preliminary Observations at Yaoan, Yunnan

Tianrui Sun, Xiaoyan Li, Lei Hu +17

The third Antarctic Survey Telescope array instrument at Dome A in Antarctica, the AST3-3 telescope, has been in commissioning from March 2021. We deployed AST3-3 at the Yaoan astr…

astro-ph.IM2022★ 465 cited

Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument

B. Abareshi, J. Aguilar, S. Ahlen +264

The Dark Energy Spectroscopic Instrument (DESI) has embarked on an ambitious five-year survey to explore the nature of dark energy with spectroscopy of 40 million galaxies and quas…

astro-ph.IM2022★ 4 cited

Simulating high-time resolution radio-telescope observations

Rui Luo, George Hobbs, Suk Yee Yong +10

We describe a new software package for simulating channelised, high-time resolution data streams from radio telescopes. The software simulates data from the telescope and observing…

astro-ph.IM2022★ 9 cited

Categorize Radio Interference using component and temporal analysis

Mao Yuan, Weiwei Zhu, Haiyan Zhang +12

Radio frequency interference (RFI) is a significant challenge faced by today's radio astronomers. While most past efforts were devoted to cleaning the RFI from the data, we develop…