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IAUC 8204: N Sgr 2003 No. 2; 2003ia

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                                                  Circular No. 8204
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


NOVA SAGITTARII 2003 No. 2
     N. J. Brown, Quinns Rocks, W. Australia, reports his discovery
of a possible nova (mag 9.2) on T-Max 400 film exposed with a
135-mm f/2 camera lens on Sept. 17.52 UT, providing a position of
R.A. = 18h10m13s, Decl. = -27o45'39" (equinox 2000.0).  On Sept.
18.43, Brown estimated visual mag 8.8.  H. Yamaoka, Kyushu
University, reports that the new star appears at V about 10.7 on an
ASAS-3 CCD frame taken on Sept. 16.07 (though its image is merged
with that of two neighboring stars).  J. D. West, Mulvane, KS,
reports the following precise position from four CCD V images
(which yielded V = 8.98 +/- 0.03, R_c = 8.49 +/- 0.05, and
[H_alpha] = 1.80 +/- 0.03 for the nova on Sept. 19.085):  R.A. =
18h10m10s.42, Decl. = -27o45'35".2 (+/- 0".17).  West adds that
nothing is located at this position on a SERC V plate taken in 1987.
W. Liller, Vina del Mar, Chile, reports that a grating spectrum
(dispersion 0.78 nm/pixel) shows a prominent H_alpha emission (FWHM
= 550 km/s) with a peak approximately 2.3 times brighter than the
surrounding continuum; a narrow P-Cyg absorption appears to be
present and shifted 590 km/s towards the blue.  CCD magnitudes from
Liller (through thin cirrus):  Sept. 19.104, V = 8.91 +/- 0.05;
19.106, B = 9.79 +/- 0.15.  Nothing is visible to mag 11.5 on a red
film taken by Liller on Sept. 13.12.
     G. Ruch, E. Polomski, and C. E. Woodward, University of
Minnesota; R. M. Wagner, LBT Observatory; and S. Starrfield,
Arizona State University, report that optical spectra (range
370-640 nm, resolution 0.6 nm) were obtained with the Steward
Observatory Bok 2.3-m telescope on Kitt Peak on Sept. 19.10 UT,
showing that the spectrum of Brown's object exhibits emission lines
of H_beta (equivalent width 0.6 nm), H_gamma, H_delta and numerous
Fe II lines with P-Cyg profiles superposed on a flat continuum.
The FWHM of H_beta emission is 612 km/s, and the terminal velocity
of the absorption component is 800 km/s.  The equivalent width of
the diffuse interstellar line at 578 nm is 0.05 nm, corresponding
to E(B-V) about 0.1 mag.  The spectra confirm that this object is
an Fe-II-class nova in its early decline stage.


SUPERNOVA 2003ia IN NGC 6109
     Further to IAUC 8203, T. Matheson et al. report that a
spectrum of SN 2003ia (cf. IAUC 8201), obtained by Calkins on
Sept. 19.18 UT, shows it to be a type-Ia supernova, about 2 weeks
past maximum.

                      (C) Copyright 2003 CBAT
2003 September 19              (8204)            Daniel W. E. Green

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