Electronic Telegram No. 403 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html RS OPHIUCHI C. Buil, Castanet, France, reports that an optical spectrogram (resolution 16000) of RS Oph, obtained on Feb. 14.21 UT with a 0.28-m Schmidt-Cassegrain reflector, shows a broad emission line of H-alpha (FWHM = 3930 km/s); the total width of the H-alpha line at the base is 7540 km/s. A narrow and intense double-peaked structure of H-alpha is present, with a red/blue-peak separation of 84 km/s; the intensity of the principal peak is 11.7 times that of the local continuum. G. Sostero, Udine, Italy, reports the following CCD magnitudes (estimated uncertainties +/- 0.05 mag) of RS Oph obtained by E. Guido and himself using a remotely operated 0.25-m reflector near Mayhill, NM -- except for the photometry on Feb. 14.2 UT, which was obtained by M. and V. Gonano at Remanzacco, Italy, also with a 0.25-m reflector: Feb. 13.490, B = 5.90; 13.491, V = 5.00; 13.493, R_c = 4.40; 14.181, B = 6.02; 14.196, V = 5.22; 14.199, R_c = 4.43; 14.209, I_c = 3.76; 14.487, B = 6.25; 14.488, V = 5.47; 14.490, R_c = 4.40; 16.484, B = 6.99; 16.485, V = 6.23; 16.487, R_c = 5.04. Visual magnitude estimates of RS Oph: Feb. 14.132 UT, 5.4 (H. G. Lindberg, Skultuna, Sweden; communicated by H. Bengstsson, Hisings Backa, Sweden); 14.172, 5.2 (C. Norrman, Hallstahammar, Sweden; via Bengtsson); 16.858, 6.8 (A. Pearce, Nedlands, W. Australia). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 February 16 (CBET 403) Daniel W. E. Green