• Title/Summary/Keyword: Astronomical research

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SURVEY ON THE OBSERVATIONAL RESEARCH ACTIVITIES USING MID-TO-LARGE SIZE TELESCOPES (중대형 망원경을 이용한 관측연구 현황)

  • Woo, Jong-Hak
    • Publications of The Korean Astronomical Society
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    • v.25 no.4
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    • pp.107-112
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    • 2010

  • By joining the Giant Magellan Telescope (GMT) project, Korean astronomers will get 10% of the GMT time, starting in the late 2010s. To prepare the GMT era, it is important to evaluate the current observational research activities. We surveyed the research programs performed by domestic astronomers during 2007A - 2010A period, using optical/near - IR telescopes with a medium to large aperture mirror (larger than 4 m). We describe the method and criteria of the survey, and present the results of the analysis based on the collected data.

  • https://doi.org/10.5303/PKAS.2010.25.4.107 인용 PDF KSCI

Weak-lensing Mass Reconstruction of Galaxy Clusters with Convolutional Neural Network

  • Hong, Sungwook E.;Park, Sangnam;Jee, M. James;Bak, Dongsu;Cha, Sangjun
    • The Bulletin of The Korean Astronomical Society
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    • v.45 no.1
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    • pp.49.4-50
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    • 2020

  • We introduce a novel method for reconstructing the projected matter distributions of galaxy clusters with weak-lensing (WL) data based on convolutional neural network (CNN). We control the noise level of the galaxy shear catalog such that it mimics the typical properties of the existing Subaru/Suprime-Cam WL observations of galaxy clusters. We find that our mass reconstruction based on multi-layered CNN with architectures of alternating convolution and trans-convolution filters significantly outperforms the traditional mass reconstruction methods.

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