[Aavso-photometry] [Fwd: AAVSO Special Notice #105: Possible Nova in Sgr]

[Shawn Dvorak]

Observations this morning at JD 54575.86 showed the new object at 
b=9.204, v=9.227, using TYC 6850 1118 (V=9.11, B=9.59) as a comparison star.

BTW: the object sits on the edge of a nice dust cloud in a very rich 
field - a good view on deep images.

Shawn Dvorak (DKS)
Rolling Hills Observatory


-------- Original Message --------
Subject: 	AAVSO Special Notice #105: Possible Nova in Sgr
Date: 	Sat, 19 Apr 2008 08:29:41 -0400
From: 	aavso at aavso.org
To: 	sdvorak at rollinghillsobs.org



AAVSO Special Notice #105

Possible Nova in Sgr
April 19, 2008

The CBAT Unconfirmed Observations Page listed
a possible nova in Sgr.  After a call on VSNET-ALERT,
Ernesto Guido and Giovanni Sostero (Remanzacco
Observatory) used a robotic telescope near Mayhill, NM
to confirm the new object (VSNET-ALERT 10077).
They provide accurate coordinates (using UCAC2) as:
18:05:58.90 -27:13:56.3 J2000
No magnitude is given by Guido and Sostero, but
the original discovery magnitude was 8.4C on 20080418.
No star close to this position is seen in the
USNO-B nor 2MASS catalogs.  Kato (VSNET-ALERT 10075)
indicates that this new outbursting object has
a pre-discovery observation by ASAS:
20080416.3048 11.671V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
but was not visible 3 days earlier.

While we recommend following this new nova as
long as possible, please note that the field is
near the galactic center and very crowded.  As the
nova fades, it will be difficult to measure.
We expect to get a photometric calibration as
weather permits at SRO.
Arne
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