COROT TARGETS: PROGRESS REPORT ON THE PHOTOMETRIC AND SPECTROSCOPIC MONITORING OF DSCT, GDOR AND BCEP VARIABLE STARS

In summer 2004 it has been possible to start the target characterization. Several observing runs in photometry Sierra Nevada Summer 2004 P. Amado and S. Martin S. Pedro Martir Summer 2004 E. Poretti Sierra Nevada Winter P. Amado and S. Martin S. Pedro Martir Winter M. Alvarez and E. Poretti APT Winter W.W. Weiss Mercator Summer 2005 C. Aerts and coll. Piszkesteto Summer 2005 M. Paparò and coll. Sierra Nevada Summer 2005 S. Martin S. Pedro Martir Summer 2005 M. Alvarez S. Pedro Martir Winter E. Poretti and. M. Alvarez S. Pedro Martir Winter E. Michel and STEPHI coll. Sierra Nevada Winter S. Martin and E. Rodriguez

Positions of the DSCT+GDOR targets in the CMD 1HD GDOR+DSCT 2HD DSCT 3HD DSCT 4HD DSCT 5HD DSCT 6HD DSCT 7HD EA+SB2+DSCT 8HD DSCT (revised) 9HD GDOR 10HD GDOR 11HD BCEP 12HD BCEP (Poretti et al. 2005, AJ 129, 2461)

NOVEMBER 2003 (8 nights)JANUARY 2005 (4 nights) HD 44195, the hybrid GDOR + DSCT star v sin i = 58 km/s, in the field of HD 43587, f 1 =20.48 c/d NOVEMBER 2005 (6 nights) The DSCT variability seems to be monoperiodic, The GDOR variability seems to be multiperiodic

HD 44283, multiperiodic DSCT variable, small v sin i (19 km/s), evolved (?) c/d, predominant mode (ampl mag in v) Second term, f=9.62 c/d, ampl mag in v ) Asteroseismic peaks in the c/d range, ampl. < mag in v)

The field of HD 43587: asterosesismic orientation of the pointing 1.0 solar mass star, MS Target currently in the short list STARE CCD photometry S. Pedro Martir uvby photometry Sierra Nevada uvby photometry Mercator, APT, SAAO contributions 1 HD V=7.82 ZAMS 11 c/d, 80 km/s 2 HD V=9.29 zigzags 15 c/d 19 km/s 3 HD V=7.57 ZAMS hybrid GDOR+DSCT 58 km/s 5 Red variable 6 Hipparcos variable 7 GSC DM HADS V=10.2 Be : HD 43285, V=6.07

HD 49434, confirmation of the light variability High precision photometry (s.d. better than mag) on four consecutive nights. Peak-to-peak amplitudes mag in violet mag in blue mag in yellow Multiperiodicity probable. The observations planned in December (OSN and SPM) will be decisive to detect periodicities. Additional APT timeseries available.

HD 50870, a DSCT star in the field of HD f 1 =17.15 c/d f 2 =14.00 c/d ………. Slow rotator, V eq sin i = 17 km/s Predominant mode STEPHI campaign in November 2005

The positioning of HD could be a critical item HD and HD are located on the edges. There are three Be stars close to HD 58070

HD , orbital period has been detected: d. Eccentric orbit with only one minimum. DSCT pulsation: frequencies in the c/d interval. (Martin et al., 2005, A&A 440, 711) The RV curve has been the goal of successful spectroscopic observations in past summer (OHP, SLN, ESO). Target of a STEPHI campaign in 2004.

HD , Beta Cep variable, but probably not a multiperiodic one Monitored at SPM and OSN in Stromgren photometry, with Mercator telescope in the Geneva system and and with M. Piszkesteto telescope in V filter Pulsational frequency term identified as the Fundamental radial mode (Aerts et al., in preparation)

Reminiscent of the case of BW Vul (Sterken and coll.) HD , Mercator and Mt. Piszkesteto light curves in V light BW Vul

HD hybrid HD f=20.5 c/d f< 5c/d 7.56 F0 58 km/s HD DSCT HD f= F0 17 km/s HD DSCT HD f= F5 19 km/s HD DSCT HD f= c/d 8.74 A5 98 km/s HD DSCT HD c/d 7.81 A2 197 km/s HD DSCT HD c/d 6.95 A3 >200 km/s HD DSCT HD c/d EA +SB A2 48 and 75 HD DSCT primary target 8-18 c/d 7.98 A5 170 km/s HD GDOR photometric variability CONFIRMED 5.75 F1 90 km/s HD GDOR no photometric variability 5.43 F5 72 km/s HD BCEP HD f=5.49 c/d, standstill 8.29 B1 37 km/s HD BCEP no photometric variability, multiple system 6.68 B2V Target Type Field Frequencies V Sp V sin i