1. Spectral Analysis Pipeline for LAMOST Project A-Li Luo LAMOST Science Division NAOC, CAS

2. Content Brief Introduction about LAMOST Project Science goal of the LAMOST Survey The tasks of the Spectral Analysis The feature of LAMOST spectra The software system Some analysis algorithms Integrating the pipeline to VO ???

3. Brief Introduction about LAMOST Project Aperture: 4m Focal length : 20m Field of view:5 degree Focal plane:1.75m Number of fiber:4000 Spectra of objects as faint as 20 m.5 with an exposure of 1.5 hour Range:370nm-900nm Resolution: R=1000 & 2000 MA Reflecting Schmidt Corrector MB Spherical Primary Mirror Focal Plane A meridian reflecting Schmidt telescope

4. Science goal of LAMOST Contribute to the study of extra-galactic astrophysics and cosmology, such as galaxies, quasars and the large-scale structure of the universe. Contribute to the study of stellar astrophysics and the Galaxy. Contribute to the cross-identification of multi-waveband of celestial objects.

5. The tasks of the 1-d Spectral Analysis Parameters of spectral lines Redshifts Automated Classification Automated Identification Automated Measurement Classes LAMOST DATA ARCHIVE

6. The Feature of LAMOST Spectra Large amount 10,000,000 galaxies; 1,000,000 QSO Low S/N (especially at blue end) 20. m 5 ~ S/N < 10 Difficult to separate point objects from extended sources through PSF (too faint) No standard star in each field Redshifts affecting the classification

7. The Software System Pre- processing Classification Rare object dataset Classified dataset Knowledge Normalized dataset Raw dataset Measurement Data Mining & Knowledge discovery Processing layer Data layer

8. Some Analysis Algorithms Wavelet PCA, PCAZ ANN(SOFM, PNN, RBF) Hough HMM, EM SVM

9. How to Integrate LAMOST Spectra Analysis Pipeline to VO We need Your advice Your experience Your technique support Thanks!!!