Suijian Xue ( 薛随建 ) National Astronomical Observatories, Chinese Academy of Sciences JEJU, Korea Regional Report Astronomical Activities Update.

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Presentation transcript:

Suijian Xue ( 薛随建 ) National Astronomical Observatories, Chinese Academy of Sciences JEJU, Korea Regional Report Astronomical Activities Update in the Core Observatories, China Mainland

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

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

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

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

Spherical reflector ： Radius ～ 300m, Aperture ～ 500m, Opening angle 110~120° Illuminated aperture ： D ill =300m Focal ratio ： f/D =0.467 Sky coverage ： zenith angle 40°(up to 60°with efficiency loss) tracking hours 0~6h Frequency ： 70M ~ 3 GHz （ up to 8GHz in future upgrading ） Sensitivity (L-Band) ： A/T~2000, T~25 K Resolution (L-Band) ： 2.9′ Multi-beam (L-Band) ： 19, beam number of future FPA >100 Slewing ： <10min Pointing accuracy ： 8″ General Technical Specification

Proposal initialized – 15 yrs ago International review and advisory conference Chaired by Fred Lo and Shuhua Ye Funding Proposal finally has been approved by NDRC Feasibility Report approved by NDRC Preliminary design reviewed by CAS and GuiZhou government Foundation laid First light FAST events

FAST progress Exploration in depression rock-soil samples from ground

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

Physical Area: 50544m 2 Working Frequency: MHz x6 km arms 21 Centimeter Array (21CMA) Goal: Search for the Lights of First Stars at Epoch of Reionization Chief Scientist: Prof. Xiangping WU

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

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

Goal: catch EOR signal times below foreground VHF 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

05/07/2010

 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  CSRH-II (2-15 GHz) in