[IAUC] CBET 1039: 20070822 : V5558 SAGITTARII

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                                                  Electronic Telegram No. 1039
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
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V5558 SAGITTARII
     L. Kiss, University of Sydney; and K. Sarneczky, University of Szeged,
report that optical spectra (0.05 nm/pixel, ranges 400-500 and 580-680 nm)
of V5558 Sgr (cf. IAUC 8832; CBETs 1006, 1010) were obtained on Aug. 18.56
UT (during the second major rebrightening of this slow nova) with the Siding
Spring 2.3-m telescope (+ DBS CCD spectrograph).  The hydrogen Balmer lines
show emission profiles with broad wings (FWZI approximately 3000-3500 km/s)
and distinct narrow central components (FWZI approximately 600-700 km/s),
separated by P-Cyg-like absorptions at about -300 km/s.  Similarly complex
line profiles are seen for the numerous Fe II emission lines, most notably
for the Fe II (27, 28), (37, 38), and (42) multiplets in the blue range and
the Fe II (74) triplet in the red range.  The Na I D doublet has multiple
absorption components, suggesting both complex velocity structure in the
intervening clouds and strong interstellar extinction.
      This nova has continued to slowly brighten, as indicated by the
following visual magnitude estimates (cf. CBET 1006):  July 18.888 UT, 8.6
(M. Lehky, Hradec Kralove, Czech Republic); 18.903, 8.4 (K. Hornoch,
Vohancice, Czech Republic); 20.864, 8.7 (Lehky); 21.870, 8.4 (Hornoch);
21.885, 8.4 (Lehky); 22.875, 8.2 (Hornoch); 22.885, 8.3 (Lehky); 23.888, 8.2
(Hornoch); 23.935, 8.4 (A. P. Correia, Esposende, Portugal); 24.925, 8.2
(Hornoch); 25.896, 8.1 (Lehky); 26.877, 8.1 (Hornoch); 26.882, 8.1 (Lehky);
27.872, 8.0 (Hornoch); 30.874, 8.5 (Hornoch); 31.885, 8.6 (Hornoch); Aug.
1.835, 8.7 (Hornoch); 1.854, 8.6 (Lehky); 3.876, 8.6 (Hornoch); 4.894, 8.7
(Hornoch); 4.916, 8.6 (Lehky); 5.842, 8.6 (Hornoch); 5.916, 8.7 (Lehky);
6.838, 8.7 (Hornoch); 6.916, 8.7 (Lehky); 9.809, 8.6 (T. Scarmato, Calabria,
Italy); 10.922, 7.6 (Scarmato); 11.840, 7.3 (Scarmato); 12.829, 7.4
(Scarmato); 13.827, 7.9 (Scarmato); 14.808, 7.6 (Scarmato); 14.882, 7.8
(Lehky); 15.863, 7.4 (Scarmato); 16.803, 7.9 (Scarmato).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 August 22                   (CBET 1039)              Daniel W. E. Green