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IAUC 8199: 2003hx; N Sct 2003; Poss. N IN M33

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                                                  Circular No. 8199
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2003hx IN NGC 2076
     Further to IAUC 8198, J. Burket, M. Papenkova, and W. Li
report the LOTOSS discovery of an apparent supernova on unfiltered
KAIT images taken on Sept. 12.5 (mag 14.3) and 13.5 UT (mag 14.4).
SN 2003hx is located at R.A. = 5h46m46s.97, Decl. = -16o47'00".6
(equinox 2000.0), which is 5".2 west and 2".6 south of the nucleus
of NGC 2076.  A KAIT image taken on Mar. 7.2 showed nothing at this
position (limiting mag about 18.5).

     S. Siviero, P. M. Marrese, and U. Munari, Asiago Observatory,
write that the spectroscopic evolution of the possible nova
reported on IAUC 8190 and 8191, as monitored with the Asiago 1.22-m
and 1.82-m telescopes, allows them to classify the object as a
normal nova.  Spectra (with AFOSC in echelle mode; range 360-860 nm;
resolving power 3800) obtained on Sept. 6.83 UT display a well-
developed emission-line spectrum dominated by Fe II lines
(multiplets 27, 28, 37, 38, 40, 42, 48, 49, 73, and 74, among
others), and Balmer lines characterized by a rapid decrement.  Most
lines display complex P-Cyg profiles, those of the Na I D lines
having an emission width of 900 km/s and a terminal velocity of
1150 km/s for the absorption, with superimposed marked interstellar
components.  No nebular lines have so far developed.
     H. Yamaoka, Kyushu University, reports his precise astrometry
of this nova, from CCD images taken by B. Monard (on Aug. 30.7 UT)
and by D. Rodriguez (Aug. 31.0), with respect to the UCAC-2
reference frame (about 100 stars; mean residual about 0".1): R.A. =
18h49m37s.600, Decl. = -9o33'50".85 (equinox 2000.0).  Yamaoka adds
that nothing is visible within 2" of this position on the red 1984
Digitized Sky Survey image or the 1999 2MASS public images.  A.
Henden, U.S. Naval Observatory, Flagstaff, reports the following
position end figures from his images of the nova:  37s.602, 50".76.
     W. Hasubick, Buchloe, Germany, reports that nothing was
visible at the position of the nova on a photograph taken with a
280-mm f/2.8 lens on Aug. 23.9 UT (limiting mag 14).

     A. Shporer, E. O. Ofek, and T. Mazeh, Wise Observatory, Tel
Aviv University report further V magnitudes of the new possible
nova in M33 (cf. IAUC 8195):  Aug. 28.95 UT, [20:; Sept. 3.05, 16.9
+/- 0.1.

                      (C) Copyright 2003 CBAT
2003 September 13              (8199)            Daniel W. E. Green

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