1. Exoplanet Transit Observations at Weihai Observatory of Shandong University Chen CAO caochen@sdu.edu.cn

2. Weihai Observatory of Shandong University Longitude: 122 ° 03‘ 02“ E Latitude : 37°32‘ 12“ N Altitude : 110 m -- Observing nights: ~200/yr -- Average seeing: ~1.5”

3. 1000mm FOV Optics: classic Cassgerain design, 1000mm optical working diameter, Primary focal ratio:f/3, system focal ratio: f/8  FOV: ~ 11’ Mount: equatorial fork mount Maximum loading weight is 100kg at the focus flange Maximum slew speed is 4 degrees per second in both RA and DEC axis Pointing: 5.4 arc sec RMS for 20- 90 deg altitude Tracking: 0.54 arc sec RMS in 10 minutes blind guiding Telescope Made by APM from Germany

4. 2K * 2K 13.5  m B.L. cooling with air ~ -65° CCD PIXIS 2048B

5. ACE Dual filter wheel Photometry system—Filter system UBVRIuvby

6. Motivation Goal A -- More Exoplanet transits’ data  help to derive higher accuracy planet parameters ; discover the possible “third” object by transit timing. Goal A -- More Exoplanet transits’ data  help to derive higher accuracy planet parameters ; discover the possible “third” object by transit timing. Goal B -- Try to detect transits of those known exoplanets which were discovered by RV method but still without transit detections. Goal B -- Try to detect transits of those known exoplanets which were discovered by RV method but still without transit detections. Goal C -- Make follow-up photometry observations of the new exoplanet systems discovered by our new high-res spectrograph (will be installed by the end of this year, by NIAOT). Goal C -- Make follow-up photometry observations of the new exoplanet systems discovered by our new high-res spectrograph (will be installed by the end of this year, by NIAOT).

7. High-res Spectrograph design R: 38,000~55,000 R: 38,000~55,000 Operational Wavelength:3,800 Å ~8,800 Å Operational Wavelength:3,800 Å ~8,800 Å Wavelength Overlap in Echelle orders:3,800 Å ~7,700 Å Wavelength Overlap in Echelle orders:3,800 Å ~7,700 Å Echelle: Newport spectra physics R2.9 Echelle: Newport spectra physics R2.9   Lei Wang ’ s talk

8. Ephemeris – I. xls from AXA (for Goal A)

9. Ephemeris – II. (transitsearch.org) (for Goal B)

10. Observations Instruments: 1m 1m reflecting telescope (by APM) PI PI CCD (PIXIS 2048B, 2K*2K)Observations: 30 ~ 60 mins 30 ~ 60 mins before and after the predicted transit time (if possible)

11. Observinglog 30 Total: ~30 nights 12 12 transit events

12. Data Reduction Data reduction (bias, flat subtraction etc.) with IRAF Data reduction (bias, flat subtraction etc.) with IRAF Aperture photometry Aperture photometry  using IRAF & MaxIM DL (by students)  using IRAF & MaxIM DL (by students)

13. Send the results to: TRESCA Project http://var2.astro.cz/EN/tresca/transits.php?pozor=Chen%20CAO

14. TrES-3b (V=12.4, D=27.1mmag) 2009-04-162009-05-03

15. 2009-06-10 2009-07-31 TrES-3b

16. 2009-07-31 TrES-1b (V=11.8, D=25.1mmag)

17. XO-2b (V=11.2, D=14.2mmag) 2008-12-11 2009-04-21 2009-05-04

18. 2009-08-30 WASP-1b (V=11.8, D=14.6mmag)

19. 2009-08-30 WASP-2b (V=12.0, D=19.5mmag)

20. 2009-08-01 WASP-3b (V=10.6, D=12.2mmag)

21. 7.0 HAT-P-7b (V=10.5, D=7.0mmag) 2009-04-21

22. Research assistant: undergraduate students 30cm refracting telescope (with a SBIG ST- 8E CCD) F. Wang X. Zhang N. Song J. Zhang

23. Next Step Works Continuing the transit observations ; Continuing the transit observations ; Analyze the results in more details ; Analyze the results in more details ; Install our high-res. Spectrograph. Install our high-res. Spectrograph. So we really need: Your good advice & suggestions !!! Your good advice & suggestions !!! Better exoplanet “target” !! Better exoplanet “target” !! Good collaborators !!! Good collaborators !!! More observing time ! More observing time !

24. Welcome to Weihai ！ Liugong Island Contact: caochen@sdu.edu.cn Contact: caochen@sdu.edu.cn 0631-5688881(O) 13686318965 (M) Thank You !! 感 謝 !!