[vsnet-alert 2417] SN 1998ew in NGC 6943

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear SN watchers,

  A bright southern supernova has been discovered by Chile astronomer.
IAUC 7061 reports that SN 1998ew was discovered on Nov. 23.02 UT, when
its magnitude was B about 14.  It has been revealed that it is of type
II supernovae in early phase (near maximum) by ESO spectroscopy.

  The position of this new star is R.A. = 20h44m32s.1, Decl. =
-68o43'37" (2000.0), which is about 5" west and 73" north from the
spiral host galaxy.  It is well outside of the visible disk, and
between two foreground (about 15 mag) USNO stars.  

  Current reports about magnitudes are (all of them are from IAUC): 

Nov. 11.06  >195B  Cerro El Roble
Nov. 23.02   14:B  Cerro El Roble
Nov. 27.05   152:V ESO
Nov. 27.05   149:R ESO

  The recession velosity of NGC 6943 is around 3000 km s-1, then the
typical SN II on this galaxy is expected to be about 16 mag or so on
its maximum.  The reported magnitudes are well brighter than this
value, so the followup magnitude estimates are surely encouraged for
this peculiar SN.  

  There has been reported some bright SNeII, such as SN 1998S.  But
from the information on IAUC, the spectrum of SN 1998ew does not
resemble that of SN 1998S (narrow-line SN II). ESO reporters
suggest that SN 1998ew shows some resemblance to SN 1979C. 

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp