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THE ASTRONOMER Electronic Circular No 2617      2010 Jan 17 12.30UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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NOVA OPHIUCHI 2010
CBET 2128 carries news of the discovery of a possible nova in Ophiuchus 
by Hideo Nishimura of Japan on images of 2010 Jan 15.857UT. The object, 
of magnitude 8.4, was recorded on multiple frames obtained with a Canon 
5D digital camera + Minolta 120-mm f/3.5 lens and had a limiting 
magnitude of 11.0. The position is:
RA 17h 39m 41s DEC -21 39' 47" (2000).

The object was not recorded on frames of 2009 Jan 29-Nov 3 (limit mag 
11.0) or on 2010 Jan 13.86UT (limit 9.5). Nishimura reports a faint 
image of the possible nova at magnitude 10.1 may be present on Jan 
14.865UT with positional end figures 41.3s, 54"

Other CCD observers report positional end figures and magnitude:
Jan. 16.856, 40.94s, 47.9", mag 8.4 (K. Itagaki, Japan)
Jan. 16.860, 40.97s, 47.4", mag 8.2 (K. Kadota, Japan)

Kadota adds that nothing is visible at this position on a red Digitized 
Sky Survey image from 1997 (limiting mag estimated to be 20 by Nakano). 
Itagaki has posted his image at:
http://www.k-itagaki.jp/images/pn-sgr.jpg

Hiroyuki Maehara, Kyoto, Japan reports measures via VSNET:
2010 Jan 16.87733 9.54B; 16.87616 8.77V
0.25-m L + ST-7XME + Bessell B,V

M. Yamamoto, Japan, using a Fujifilm Finepix S2 Pro and 85mm lens 
recorded it at 8.7 (unfiltered) on Jan 16.863UT.

OT_J225749.6-082228
K. Kinugasa et. al., Gunma Astronomical Observatory (GAO); and H. 
Yamaoka, Kyushu University, report that a low-resolution spectrogram 
(420-800 nm, resolution about 500) of the new variable discovered by 
Itagaki ( TA E-Circular 2614) was obtained on 2010 Jan.13.4 UT with the 
GAO 1.5-m reflector (+GLOWS). The spectrum shows a smooth blue continuum 
with prominent H-beta and H-gamma absorption lines. While, the H-alpha 
is a shallow absorption, which seem to be filled by the emission core. 
These characteristics suggest that it is a dwarf nova in outburst.

SUPERNOVAE 2009ml-2009ms
These designations have been assigned to supernova discoveries using the 
Canada-France-Hawaii Telescope of magnitude g19 or fainter from 2009 
Oct-Nov according to CBET 2089.

SUPERNOVA 2009mt IN ANONYMOUS GALAXY
Discovery by CRTS of a possible supernova (CBET 2090):
SN      2009 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2009mt  Nov 25.35   04 02 57.68  +17 56 26.7  17.1     1.1"E, 1.3"N
A spectrogram with the SMARTS 1.5-m telescope on 2009 Dec. 19.16 shows 
it similar to the type-Ia supernova 1996X around four weeks past maximum 
light.

Guy M Hurst