[APML] Fwd: V838 Light Echo Expansion

[Alan Voetsch <critter12952@yahoo.com>]

Hi all,

Al Kelly posted this earlier today on the SBIG users
group and I thought it was cool enough to forward.
Just click on his link, well, you might want to read
his description first.

Alan

--- Al Kelly <akelly@ghg.net> wrote:
> See http://www.ghg.net/akelly/v838anim.gif for an
> animated GIF of the 
> expansion of the light echo from nova V838
> Monocerotis.  This has all 
> occurred since January and happens at apparent light
> speed, since it is 
> primarily a reflection nebula that we will see
> temporarily with the bright 
> light of the nova.  It is fading rapidly.  As far as
> I know, this is a 
> fairly new type of phenomenon for us humans to
> notice (similar to the light 
> echo from SN1987A).
> 
> The "movie" comprises four color composite images I
> processed from data 
> sets made by Arne Henden of the USNO in Flagstaff. 
> These were made in 
> January, May, September, and November, tracking V838
> from pre-expansion to 
> current appearance.
> 
> I think this object is way cool..:).  I only know of
> Gregg Ruppel's fine 
> LRGB composite in amateur circles.  This was a month
> or two ago.  Who else 
> has imaged this object?  I would enjoy seeing
> whatever is out there, while 
> we wait for stunning HST images to hit the street.



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