(IAAC) Bright supernova in NGC 6946 in Cepheus/Cygnus

[Lewis J. Gramer]

These two messages appeared on [amastro] yesterday. NGC 6946, by the
way, is that lovely little spiral on the Cygnus/Cepheus border, that
is also RIGHT NEXT to (40' NE of) a pretty open cluster, NGC 6939...

So that's three fine sights in one field, for modest amateur scopes!

Clear skies and happy SN hunting,
Lew


________________________________________________________________________
   Date: Wed, 29 Sep 2004 11:42:17 -0700 (MST)
   From: Brian Skiff <brian.skiff at lowell.edu>
Subject: Bright supernova in NGC 6946

     The _nth_ supernova in NGC 6946 has been discovered.  The position
is given as:  20 35 25.4 +60 07 18 (J2000), and magnitude 13.  The location
is on the east side of the galaxy.  A chart prepared by Reinder Bouma
is posted here:  http://www.shopplaza.nl/astro/vs-charts/sn2004et.htm

\Brian

________________________________________________________________________

Message: 2
   Date: Wed, 29 Sep 2004 21:00:35 +0200
   From: Mikkel Steine <mikkel at messier45.com>
Subject: Re: Bright supernova in NGC 6946

On Wednesday 29 September 2004 20:42, Brian Skiff wrote:
>      The _nth_ supernova in NGC 6946 has been discovered.  The position
> is given as:  20 35 25.4 +60 07 18 (J2000), and magnitude 13.  The location
> is on the east side of the galaxy.  A chart prepared by Reinder Bouma
> is posted here:  http://www.shopplaza.nl/astro/vs-charts/sn2004et.htm

According to vsnet it's the eighth supernova in NGC 6949:

[vsnet-alert 8328] SN 2004et in NGC 6946 (mag 12.8, CBET 95)
SN2004et  20040927.0  128C  SMr

# SN 2004et (20:35:25.4, +60:07:17.6 (J2000.0), offset about 250"E and
# 120"S) is hosted by NGC 6946, a quite nearby (5.1Mpc) face-on spiral
# (SAB(rs)cd) galaxy in the northern part of the constellation Cygnus.
# NGC 6946 is one of the most SN productive galaxies (SNe 1917A,
# 1939C, 1948B, 1968D, 1969P, 1980K and 2002hh), then SN 2004et is the
# eighth SN in one galaxy (new record!).  The Asiago team took a
# high-resolution spectrum on Sept. 28, which suggests that it is a
# young type II SN, affected some reddening by both in our Galaxy and
# in NGC 6946; total amount of E(B-V) is estimated as 0.41 mag.  The
# discovery magnitude is consistent with the expected maximum for
# typical SN II.  Further observations are strongly encouraged.

I've made a plot from Guide here:

http://messier45.com/images/sn2004et.gif

I'm going out just this minute to observe it.

--
Vennlig hilsen,
Mikkel Steine
___________________________________________
mikkel at messier45.com - http://Messier45.com
What to observe next?