(cba:news) possible outburst of SDSS J225749.54-082228.7

Joe Patterson jop at astro.columbia.edu
Sat Jan 9 11:12:58 EST 2010

Hi CBAers,

Gracious.  Another strange one - possibly like KT Eri = Nova Eri 09.
This one has a pretty good chance of being a dwarf nova, though.
Let us know what you manage to learn about it.  What's the rough color? 
Does it vary on a short timescale? - those might well be the strongest 
clues (with "blue" and "yes" being the choices indicating something like 
a DN).


-------- Original Message --------
Subject: [vsnet-outburst 10891] possible outburst of SDSS 
J225749.54-082228.7: new CV or nova?
Date: Sat,  9 Jan 2010 21:26:54 +0900 (JST)
From: Hitoshi Yamaoka <yamaoka at ursa.phys.kyushu-u.ac.jp>
To: vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp
CC: yamaoka at phys.kyushu-u.ac.jp

Hi all,

   I have submitted the report below to the CBAT.

   Itagaki-san reported his detection of an apparent new stellar object
(unfiltered mag 13.0) on Jan. 9.430 UT.  He reported the position as
R.A. = 22h57m49s.57, Decl. = -08d22'27".9.  It should be an outburst
of a star SDSS J225749.54-082228.7, which is tabled in some catalogs
(USNO A2.0, USNO B1.0, GSC 2.3 and so on) as a star with mag about 20.
Like as KT Eri, the amplitude of seven magnitudes is rather large for
a dwarf nova, but somewhat small for a rapid classical nova.

Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka at phys.kyushu-u.ac.jp <- changed!

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