[IAUC] CBET 1035: 20070816 : NOVA VULPECULAE 2007

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                                                  Electronic Telegram No. 1035
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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NOVA VULPECULAE 2007
     P. Skoda, J. Kubat, V. Votruba, M. Slechta, Z. Podskalsky, and M.
Kartak, Astronomical Institute, Ondrejov, Czech Republic, report spectra
of N Vul 2007 were obtained with the Ondrejov 2-m telescope.  A coude
spectrum (resolving power 13000, 0.025 nm/pixel, range 625-675 nm) on Aug.
15.003 UT shows a broad-emission (FWHM = 2600 km/s) H_alpha profile
(relative emission strength 6.9 times that of the continuum) with a central
absorption at +500 km/s and shallow P-Cyg absorption at the blue edge of
H_alpha.  The He I 667.8-nm line has two peaks (relative emission strengths
1.7 and 2.0 times that of the continuum) with maxima placed at -1490 and
+1430 km/s (+/- 50 km/s), respectively.  On the similar spectrum from Aug.
15.99, this 3300-km/s-wide line has an almost-flat top, and the small
absorption on the left side of the H_alpha profile has disappeared.  The
high-resolution spectrum obtained with the Ondrejov echelle spectrograph
(resolving power about 40000, 0.008 nm/pixel, range 450-800 nm) on Aug.
15.10 confirms the emission nature of He I lines 492.2-, 501.5-, 504.8-,
587.6-, 667.8-, and 706.5-nm with peak maximum placed at 1450 km/s (+/- 80
km/s).
     CCD magnitude estimates (cf. IAUC 8861, CBET 1029):  Aug. 10.01 UT, V
= 8.4 +/- 0.05 (G. Bianciardi, University of Siena, remotely using a
telescope near Catania, Sicily): Aug. 10.893, R = 9.34 (J. M. Villegas,
Mataro, Spain; unfiltered); Aug. 10.973, V = 9.24 +/- 0.02 (Bianciardi);
Aug. 11.989, V = 9.13 +/- 0.02 (Bianciardi); Aug. 12.000, V = 8.73 +/-
0.01, R = 8.51 +/- 0.01 (A. Sanchez, Gualba Observatory, Spain); Aug.
12.001, I = 8.52 +/- 0.01 (A. Sanchez, Gualba Observatory, Spain); Aug.
12.859, V = 9.08 +/- 0.02 (Bianciardi).
     Visual magnitude estimates (cf. CBET 1029):  Aug. 10.913 UT, 9.5 (R.
Casas, Sabadell, Spain); 10.966, 9.4 (M. A. Fernandez-Ocana, Vallirana,
Spain); 11.872, 9.2 (A. Diepvens, Balen, Belgium); 11.952, 8.9 (T.
Scarmato, Calabria, Italy); 12.829, 9.0 (Scarmato); 13.838, 8.2
(Scarmato); 13.871, 8.4 (Diepvens); 14.812, 9.9 (Scarmato); 14.902, 9.8
(M. Lehky, Hradec Kralove, Czech Republic).


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                         (C) Copyright 2007 CBAT
2007 August 16                   (CBET 1035)              Daniel W. E. Green