1. Radial-velocity observations of pulsating stars with a new Poznań Spectroscopic Telescope 23 June 2008 Poznań Astronomical Observatory Adam Mickiewicz University Poznań, Poland

2. Our team R. Baranowski, P. Bartczak, W. Borczyk, W. Dimitrov, M. Fagas, K. Kamiński, T. Kwiatkowski, R. Ratajczak, A. Rożek, A. Schwarzenberg-Czerny

3. The „dome”

4. Mirors diameter – 0.4 m Focal length – 1.8 m Optical system – Newtonian Diameter of the fibers – 50  m Accesible altitudes h>24° Mean. slewing rate 90°/min Guiding cameras ST7 The telescope

5. The echellé spectrograph Baudrand and Bohm (1992)

6. CCD camera: Andor DZ 436 5-stage peltier cooling Temp. –95°C 2048 x 2048 pix pixel size 13.5 x 13.5 μ m dark current <1el/h readout noise 2.1 el/pix Echellé spectrograph Spectral range: 4480 Å – 9250 Å Resolution: R=35000 (~8 km/s)

7. Acquisition box

8. Echellé spectrum – 64 orders 4480 Å – 9250 Å blue range: 1pix = 0.04 Å order length = 80 Å every order adds 40 Å middle: 1pix = 0.05 Å ~2.5 km/s order length = 100 Å every order adds 80 Å red range: 1pix = 0.08 Å order length = 160 Å every order adds 125 Å

10. ThAr calibration spectrum 1400 lines

11. Flatfield and fringe effect

13. Telluric lines removal

14. Flux calibration

15. Line profiles Sp=B1 V=1 m exp=250s H β 4861 Å

16. Limiting magnitude - BD+39 3012C 11 m.2 Sp=F5 exp=30min

17. 28 And δ Sct Sp=A7III V=5 m.2 exp=600s analysed by T. Kwiatkowski, W. Borczyk & A. Rożek

18. γ Peg β Cep Sp=B2IV V=2 m.8 exp=600s or 300s period=3.4h υ 1 =6.59 c/d analysed by W. Borczyk

19. V440 Per δ Cep Sp=F7Ib V=6 m.3 exp=600s analysed by A.Schwarzenberg-Czerny and M. Fagas σ poz =136 m/s ---2 harmonics ---1 harmonic

20. Polaris analysed by M. Fagas and K. Kamiński okres obs.P [d]2K [km/s]ref. 1896 – 1950~5-6 Campbell (1899), Roemer (1965) 1899 - 19233.96809Moore (1924) 1944 – 19543.96961Stebbius (1946) 1981 – 19823.97156 2 ± 1 2.8 ± 0.6 Arellano Ferro (1983) Kamper et al. (1984) 1987 - 19883.9746 ± 0.00081.5 ± 0.08Dinshaw et al. (1989) 1992.4 1993.2 3.97268 ± 0.00011 1.555 ± 0.056 1.517 ± 0.047 Hatzes & Cochran (2000) 1994.26 1996.96 3.9721 1.66 ± 0.02 1.68 ± 0.08 Kamper & Fernie (1998) 2005.183 2006.360 2007.349 3.97208 ± 0.00013 2.210 ± 0.048 2.080 ± 0.042 2.406 ± 0.018 Lee et al. (2008) 20083.97792 ± 0.00152.52 ± 0.03Borowiec (2008)

21. Statistics 13 august 2007 - 30 may 2008 83 nights 637 hours 1080 science spectra Colaborators Warsaw CAMK Vienna Institute of Astronomy Wrocław Astronomical Institute Toruń Centre for Astronomy

22. Future perspectives Upgrade of the telescope: 2 x 0.5m mirrors simultaneous exposure of two fibers better automatisation and remote control Upgrade of the calibration, some ideas: experiment - mixing the ThAr and stellar light V rad accuracy increase with a iodine cell spectral resolution increase with the EDI interferometer Radial velocity measurements: broadening function TODCOR spectral disentangling