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Suijian Xue ( 薛随建 ) National Astronomical Observatories, Chinese Academy of Sciences

Regional Report Astronomical Activities Update in the Core Observatories, China Mainland. Suijian Xue ( 薛随建 ) National Astronomical Observatories, Chinese Academy of Sciences 2010-05-10 @ JEJU, Korea. Changchun Observatory (CAO). Urumqi Observatory (UAO). Yunnan Observatory (YNAO).

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Suijian Xue ( 薛随建 ) National Astronomical Observatories, Chinese Academy of Sciences

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  1. Regional Report Astronomical Activities Update in the Core Observatories, China Mainland Suijian Xue (薛随建) National Astronomical Observatories, Chinese Academy of Sciences 2010-05-10 @ JEJU, Korea

  2. Changchun Observatory (CAO) Urumqi Observatory (UAO) Yunnan Observatory (YNAO) National Astronomical Observatories (NAOC) Nanjing Institute of Astronomical Optics and Technology (NIAOT) Headquarters Shanghai Observatory (SHAO) Purple Mountain Observatory (PMO) CAS core observatories

  3. Changchun Xinglong (LAMOST) Urumqi HuaiRou Urastai Miyun NAOC Delingha PMO NIAOT SHAO FAST Gaomeigu YNAO 7 Distribution of the Observatories/Stations/Institutes of NAOC

  4. Current and Ongoing Major Programs & Facilities - Ground－Based Facilities Status & Progress of FAST, 21CMA

  5. Five-hundred-meter ApertureSpherical Telescope - FAST Three outstanding aspects Unique Karst depression as the site Active main reflector Cable - parallel robot feed support FAST sciences • Neutral Hydrogen line (HI) survey • Pulsar research • Joining VLBI network • Molecular lines • Search for Extraterrestrial Intelligence (SETI)

  6. General Technical Specification

  7. FASTevents • 1994.7 Proposal initialized – 15 yrs ago • 2006.3 International review and advisory conference Chaired • by Fred Lo and Shuhua Ye • 2007.7 Funding Proposal finally has been approved by • NDRC • 2008.10 Feasibility Report approved by NDRC • 2008.12 Preliminary design reviewed by CAS and GuiZhou • government • 2008.12 Foundation laid • 2015.1 First light

  8. FAST progress Exploration in depression rock-soil samples from ground

  9. FAST progress aluminum • Reflector elements and prototyping • triangular panels, side ~11m, • manufacturing error ~ 2.0 mm Trilateral collaboration on the Multi-horn 19-beam receiver

  10. 21 Centimeter Array (21CMA) Goal: Search for the Lights of First Stars at Epoch of Reionization Physical Area: 50544m2 Working Frequency: 70-200MHz 10287 antennas @ 4x6 km arms Chief Scientist: Prof. Xiangping WU wxp@bao.ac.cn

  11. S N W 1 pod=127 antennas control room 21CMA Layout 81 pods along two perpendicular arms (6km+4km) Baselines: 3240 Freq channels: 4096 Total data size: 4 terabytes / day E

  12. Radio Sky Seen with 21CMA 100 sqr deg around NCP region 10o 10o

  13. Goal: catch EOR signal 10000 times below foreground VHF Sky@21CMA Residual Background

  14. Chinese Spectral Radioheliograph (CSRH) a new instrument capable of true imaging spectroscopy, with high temporal, spatial, and spectral resolution Specifications Freq Range 0.4–15 GHz Spatial Res. 1.3”– 50” Array 40×4.5m＋ 60×2m Max baseline 3 km Field of view 0.6°– 7° Site: Inner Mongolia 14

  15. 05/07/2010

  16. By April 2010，5-sets of antennas, feeds, LNAs, optic Transmitter/ Receivers, monitoring sub-system, analogous receivers, digital correlation receivers assembled at Mingantu Observatory, ready for 5-element test • For CSRH, radio quiet zone protection has been established • CSRH-I (400MHz-2GHz) in 2008-2010 • CSRH-II (2-15 GHz) in 2011-2013

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