1. Tests of AST3-2 at Xinglong: Image Analysis Ma Bin NAOC 2013.05.20

2. Tests of AST3-2 at Xinglong Date: late Feb – early April Tests: focusing pointing, tracking operation & data system auto-survey real-time pipeline & database remote control

3. High Dark Level CCD TEC did NOT work well t_CCD ~ t_air ( ～ 0 ℃ ) dark: 100ADU/s (sky: 10ADU/s) Pixel-to-pixel variance Limiting depth!

4. Field Rotation Alt-Az mount

5. Field Rotation 30 sec

6. Field Rotation Speed Limiting Exptime !

7. Focusing Steps: Frames at diff. f FWHM measurement Fitting Influences: Seeing Unsteady due to movement

8. Focal Plane

9. Pointing Correction Tpoint: telescope axes.vs. alt-az

10. Pointing Time Neighbor field: 1.5 degree Firstly criterion RMS<2“, 40sec 0324 20sec, but elongated 0409 RMS<1.5”, <15sec, unelongated

11. Astrometric Accuracy 0324 M35 1ses Scamp Ref cat: PPMX RMS ~ 0.15”

12. Limiting Mag 0306 open cluster M44 10sec

13. Trail of Bright Star Frame transfer 0.43sec 2640 lines bright star -> trail high speed sampling

14. Trail of Bright Star Movement of the center when both tracking and untracking Cause: Seeing ？ Shake of the telescope ？

15. Thank you !