Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7304: 1999et; 1999eu; 1999dq, 1999eh, 1999ej, 1999el

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 7303  SEARCH Read IAUC 7305

View IAUC 7304 in .dvi or .ps format.
IAUC number

                                                  Circular No. 7304
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 617-495-7244/7440/7444 (for emergency use only)

SUPERNOVA 1999et IN NGC 1643
     E. Cappellaro, Osservatorio Astronomico di Padova, reports his
discovery, on an R CCD frame obtained with the Danish telescope (+
DFOSC) at the European Southern Observatory, La Silla, on Nov. 4.3
UT, of a supernova (R = 17.6) located at R.A. = 4h43m44s.0, Decl. =
-5 19'09" (equinox 2000.0), which is 5".8 west and 9".8 south of
the nucleus of NGC 1643.  A spectrum obtained with same instrument
(range 330-900 nm, resolution 1 nm) shows that the object is a
typical type-II supernova, 1-2 months after maximum.  The expansion
velocity measured from the well-developed P-Cyg absorption of
H-alpha is about 6000 km/s.

SUPERNOVA 1999eu IN NGC 1097
     S. Nakano, Sumoto, Japan, reports the discovery by Masakatsu
Aoki, Toyama, of a supernova (mag 17.3) on seventeen unfiltered CCD
frames taken on Nov. 5 with a 0.40-m f/6 reflector, with confirming
frames taken on Nov. 6.  Previous frames taken by Aoki in 1996,
1997, and 1998 show nothing at this location (limiting mag 18-19).
SN 1999eu is located at R.A. = 2h46m20s.79, Decl. = -30 19'06".1
(equinox 2000.0), which is 23" east and 157" south of the center of
NGC 1097.
     P. Garnavich, S. Jha, R. Kirshner, and P. Challis, Harvard-
Smithsonian Center for Astrophysics; and B. Schmidt, Mount Stromlo
and Siding Springs Observatory, write:  "A spectrum was obtained
with the Fred L. Whipple Observatory 1.5-m Tillinghast telescope by
P. Berlind on Nov. 8.3 UT, which shows that SN 1999eu is a peculiar
type-II supernova.  A large number of narrow P-Cyg features are
distributed through the spectrum, and H-alpha has strong absorption
bands superimposed on its profile.  Na I 589.3-nm shows a well-
developed P-Cyg profile, as does Ba II 614.2-nm.  The expansion
velocity measured from the Ba II line is only 1500 km/s.  The
spectrum is nearly identical to that of SN 1997D (Turatto et al.
1998, Ap.J. Let. 498, 129), a subluminous type-II event that is
suspected of ejecting an extremely small amount of 56Ni."

SUPERNOVAE 1999dq, 1999eh, 1999ej, 1999el
     R magnitudes by K. Sarneczky, L. Kiss, and G. Szabo, at
Piszkesteto, Konkoly Observatory:  SN 1999dq in NGC 976, Oct.
21.989 UT, 16.2 +/- 0.3; SN 1999eh in NGC 2770, Oct. 26.069, 18.3
+/- 0.3; SN 1999ej in NGC 495, Oct. 27.742, 16.1 +/- 0.1; SN 1999el
in NGC 6951, Oct. 27.709, 15.0 +/- 0.2.

                      (C) Copyright 1999 CBAT
1999 November 9                (7304)            Daniel W. E. Green

Read IAUC 7303  SEARCH Read IAUC 7305

View IAUC 7304 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!