Central Bureau for Astronomical Telegrams
IAUC 7089: 1999E; 1999D; 1999B
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Circular No. 7089
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)
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URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)
SUPERNOVA 1999E IN ANONYMOUS GALAXY
I. Perez and J. Maza, Department of Astronomy, University of
Chile, reports the discovery of a supernova (B about 18) by Roberto
Antezana on a T-Max 400 film taken by L. E. Gonzalez using the
Maksutov telescope at Cerro El Roble on Jan. 15.276 UT. Direct CCD
images by Perez on Jan. 16.374 using the 1.0-m Swope telescope at
Las Campanas Observatory yield V about 16. SN 1999E is located at
R.A. = 13h17m16s.37, Decl. = -18o33'13".4 (equinox 2000.0), which
is 0".9 west and 10".0 south of the nucleus of the host spiral
galaxy. The new star is not visible on a film obtained on 1998
July 29.046 (limiting mag B > 20).
SUPERNOVA 1999D IN NGC 3690
S. Jha, P. Garnavich, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
1999D, obtained by M. Calkins on Jan. 18.5 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST spectrograph), shows it
to be a type-II supernova at an early epoch. The spectrum features
a very blue continuum, with strong P-Cyg Balmer lines. Narrow
H-alpha emission indicates a recession velocity for NGC 3690 of
2900 km/s. The photospheric expansion velocity of the supernova is
11 000 km/s, measured to the H-alpha trough. Concurrent images
taken by D. Koranyi at the Whipple Observatory 1.2-m telescope
yield a position for the supernova slightly different from that
reported by Qiu et al. (IAUC 7088). The supernova appears at R.A.
= 11h28m28s.38, Decl. = +58o33'39".0 (equinox 2000.0, uncertainty
+/- 0".2), which is 18".9 west and 4".8 south of the nucleus of NGC
3690. The spectrum and a finder chart can be obtained at
http://cfa-www.harvard.edu/cfa/oir/Research/supernova/RecentSN.html.
SUPERNOVA 1999B IN UGC 7189
A. V. Filippenko, D. C. Leonard, and A. G. Riess, University
of California at Berkeley, report that a Keck-II spectrum (range
540-910 nm) of SN 1999B obtained on Jan. 18 UT confirms that this
is a type-II supernova (cf. IAUC 7088). The spectrum exhibits
strong, broad H-alpha emission, and a few weak absorption lines.
(C) Copyright 1999 CBAT
1999 January 18 (7089) Daniel W. E. Green
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