... Using high-resolution spectra obtained with the HARPS instrument at the ESO 3.6m telescope, we detect radial velocity variations with a period of 10.86 min in Pr III, Nd III, Dy III lines and in the narrow cores of hydrogen lines. ... Fortunately, the star shows strong lines of Pr III and Nd III, which exhibit pulsational variability in almost all known roAp stars (Kochukhov & Ryabchikova 2001; Ryabchikova et al. 2007b). ... Average radial velocity of 17 Nd III lines as a function of time. ...

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... Printed in U.S.A. The Hipparcos and Tycho Photometric System Passbands MICHAEL S. BESSELL Research School of Astronomy and Astrophysics, Institute of Advanced Studies, The Australian National University, Private Bag, Weston Creek P.O., ACT 2611, Australia ; bessell=mso.anu.edu.au Received 2000 March 6 ; accepted 2000 April 17 ABSTRACT. Hipparcos and T ycho magnitudes have been extracted for many of the E-region standard stars. ... B [V regression for the E-region stars. ...