[vsnet-newvar 2553] (fwd) Re: New object near M27 (Renz) (fwd)

From: Joe Patterson <*jop_at_astro.columbia.edu*> Date: Tue, 23 Aug 2005 07:56:13 -0400 (EDT) · jop_at_astro.columbia.edu

Dear CBAers,

Most of you have heard by now of the probably eruptive and maybe strange
object just found in the field of the Dumbbell Nebula.  It's certainly a
blue star, and that makes it more or less one of our boys.  Probably a
distant dwarf nova, and maybe too difficult a target for us... but it's
too cute a discovery to let pass without notice.  On the chance that it
might be an SU UMa (50-50 I guess), we might even be able to spot
superhumps and thereby get a measure of the period.  "We" meaning you.  If
you like this sort of thing, give it a rip!

BTW the "mouse-over" thing below is particularly nice.

joe

----- Original Message -----=20
From: Wolfgang Renz=20
To: Arne Henden (AAVSO) ; Aaron Price (AAVSO) ; Dan Green (IAU)=20
Cc: J=F6rg Hanisch ; Hans-G=F6ran Lindberg ; R Jay GaBany=20
Sent: Monday, August 22, 2005 7:11 AM
Subject: New object near M27

Hello

I pushed it a bit tonight on the pretty-picture email lists.

R Jay GaBany came up with a M27 image in progress (RCOS
20 inch, STL-1000XM unbinned RGB) made on June 5, 6 and
August 11, 2005 that is much deeper and much sharper than
the DSS plates.
He made a nice mouse-over with the discovery image of
Joerg Hanisch that shows that its a new object with an
amplitude of at least 4 mag:
http://www.cosmotography.com/images/m27_mystery_snipit.html
The discovery image of Hans-Goeran Lindberg, who also
anounced the new object, wasn't as deep and with a
shorter FL.

Up to now there are negative detection reports till August 11
and posive ones starting on Aug 16.
There is also some photometry from last night:
V=3D16.17 +/- 0.01,  I=3D16.00 +/- 0.04, CV =3D 16.67and 16.69 mag.

If its not a nova could it be a SN in one of the faint galaxies
around M27 ?
http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?in_csys=3DEquatorial=
&in_equinox=3DJ2000.0&lon=3D19%3A59%3A51.29&lat=3D%2B22%3A42%3A32.3&radiu=
s=3D20.0&search_type=3DNear+Position+Search&out_csys=3DEquatorial&out_equ=
inox=3DJ2000.0&obj_sort=3DDistance+to+search+center&of=3Dpre_text&zv_brea=
ker=3D30000.0&list_limit=3D100&img_stamp=3DYES&z_constraint=3DUnconstrain=
ed&z_value1=3D&z_value2=3D&z_unit=3Dz&ot_include=3DANY&nmp_op=3DANY

Clear skies
  Wolfgang

From: "Wolfgang Renz" <w_renz@onlinehome.de>
Subject: Re: [vsnet-alert 8631] Re: New object near M27
Date: Mon, 22 Aug 2005 08:07:11 +0200

Hello Kato-san

Is it possible that outburst were overlooked by the pretty picture folks =
for decades ?

I decided to push it tonight, when I didn't see any trace of it on the =
DSS 2
infrared and the 2MASS J, H, Ks images.=20
http://www.astrouw.edu.pl/cgi-asas/asas_2mass_html/195951+2242.5
So it couldn't be a very red object that appears much brighter in the =
unfiltered
CCD images of the two discoverers.

Clear skies
  Wolfgang

--=20
Wolfgang Renz, Karlsruhe, Germany
Rz.BAV =3D WRe.vsnet =3D RWG.AAVSO