STELLAR OBSERVATIONS
NETWORK GROUP (SONG)
Chinese SONG team
Speaker: Jianning Fu (Beijing Normal University)
2010.10.16
SONG PROJECT
To install 8 1-m telescopes at 8 sites around the
equator, to compose the SONG network.
 To make High-precision continuous radial-velocity
observations for individual stars, to study the
internal structures of the target stars in detail with
asteroseismological technique.
 To make high time-resolution high-precision
photometric observations for the stars in the bulge
of the Galaxy, to search for earth-like exoplanets.
 Initialized by Danish astronomers.

Distribution of the SONG telescopes
Dome of SONG telescope
1-meter telescope
Spectrograph
Primary object of SONG:
1. Asteroseismology:
Long-duration high-duty-cycle high-precision radial velocity
curves
2. Searching for exoplanets with the microlensing effect:
High duty-cycle moderate duration high-precision photometry
for crowded star regions
Chinese SONG plan:
1. By setting up a SONG node in China,
to make international collaboration and
competition in the front edge field of stellar
physics.
2. To build up Mini-SONG, the first Chinese
global observation network located at the best
sites of the world.
SCHEDULE OF CHINESE SONG PLAN
Started in May of 2009;
 Agreement of collaboration between China and
Denmark signed in September of 2009;
 Agreement of collaboration among Denmark,
China, and the USA for the network of northern
hemisphere signed in December of 2009;
 The third SONG workshop held in Beijing in March
of 2010;
 Mini-SONG project proposed2 in March of 2010.

PROGRESS
Site investigation started in January of 2010:
Site test in Delingha;
Data being collected for the other candidate
sites;
 Composition of teams and schedule decided in
January of 2010.

WEATHER RECORD IN DELINGHA
30
25
totally clear
Partially clear
20
15
10
5
0
Jua. Feb. Mar. Apr.
May
Jun. Jul. Aug. Sep. Oct. Nov. Dec.
Monthly distribution of the observable nights in Delingha
A customized node of
SONG:
A 1-meter universal
telescope for high-precision
photometry;
To make time-series
observations for variable
objects and lucky-imaging;
A candidate site: the SouthAmerican station of NAOC
Budget：
1. Design：3 M
2. Telescopes: 27 M
3. Site: 5 M
4. Data: 3M
5. Mini-SONG: 10 M
6. Others: 2 M
In total：50 M
CHINESE SONG TEAM
Institutions:
 National Astronomical Observatories of
China
 Yunnan Astronomical Observatory
 Beijing Normal University
Thanks for your
attention！