Regarding Possible Supernova on CBAT Unconfirmed Observations Page

(psn 22 42 07.04 +29 22 28.4 16.5 R 8W 9N)

T. Kryachko and B. Satovskiy (Astrotel obs., KSU) and S. Korotkiy
(Ka-Dar obs., Moscow) confirmed possible supernova at coordinates:
R.A.=22h 42m 07.024s +/-0.03", DEC=+29d 22' 28.14" +/-0.04"
(reduction with reference to UCAC-2) on three images in red filter
with 300 sec exposure (limiting Red-filter mag 20.5) obtained on
Sep. 12.747 UT with the Takahashi FRC-300 (D=300mm, F=2330mm) + CCD
Apogee Alta U9000 at Kazan State University Astrotel observatory
(Karachay-Cherkessia, Russia). We have measured red magnitude
(reference star USNO A2.0 1125-19454507, R=16.3) of the transient
R=16.97; Sep. 12.976 UT, R=17.38 (red); Sep. 12.983 UT, B=16.72
(blue) (B-R=-0.66 - is UGWZ type CV?).

CCD image of psn: http://www.astroalert.su/files/psn20080912.jpg

D. Denisenko (IKI, Moscow) reports that there is a faint object
(Blue magnitude about 21.0) at the limit of sensitivity on two Blue
Palomar plates taken 1954 Aug. 08 (POSS-I O) and 1992 Oct. 19 (POSS-
II B) with the following coordinates (J2000.0):

22 42 07.08 +29 22 27.3

Blue Palomar plate: http://hea.iki.rssi.ru/~denis/224207+292228-DSS-
B.jpg

The object implied by the discoverers as a possible host galaxy
appears starlike on NEAT images. It is present in 2MASS catalogue as
2MASS 22420774+2922179 (J=16.838+/-0.155, H=16.056+/-0.184,
K=15.701+/-0.227) which is consistent with it being an extragalactic
source, probably a quasar (J-K>1.0). However, its relation to the
optical transient 8"W and 9"N seems unlikely, given the OT proximity
to the blue faint object on Palomar plates. Judging from amplitude
of variability, it is likely a cataclysmic variable in outburst.

Sum of 18 NEAT images: http://hea.iki.rssi.ru/~denis/224207+292228-
NEAT.jpg

There are no previous outbursts on the Palomar-NEAT images taken on
2001 July 27, Aug. 09, 13, 18, Sep. 24; 2002 Sep. 27, 28, Oct. 10
and 14.