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THE ASTRONOMER Electronic Circular No 2536      2009 Mar 25 10.16UT
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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SUPERNOVA 2009E IN NGC 4141
As a follow-up to the discovery of Supernova 2009E in NGC 4141 (CBET 
1648, TA E-Circular 2517) by Tom Boles on 2009 Jan 3 at magnitude 17.8 
(unfiltered), Guy Hurst reports that a brightening has been detected, 
some 78 days after discovery.

Photometry using the Bradford Robotic Telescope (0.35-m 
Schmidt-Cassegrain + CCD) near discovery and in a more recent image of 
Mar. 22 yielded:

Jan 28.138UT, mag 17.5
Mar 22.067UT, mag 16.7

Magnitudes are based on A2 values for multiple comparison and check 
stars converted to V.

In response to a report to the Central Bureau Dan Green has issued the 
following on CBET 1734:
E. Prosperi (Castelmartini, Italy) and G. M. Hurst (Basingstoke,
Hants, England) have both noted that this object (cf. CBET 1648) appears 
to have brightened, as indicated by their unfiltered CCD magnitudes of 
2009E obtained with 0.35-m reflectors:  Jan. 16.944 UT, 17.4 (Prosperi); 
28.138, 17.5 (Hurst); Mar. 8.053, 16.3 (Prosperi); 9.916 16.2 
(Prosperi); 22.067, 16.7 (Hurst). No spectroscopy of this object has 
been reported to the Central Bureau, so the supernova type remains 
unknown.


It is hoped this will persuade a group to obtain a spectrum and classify 
the object but in the meantime we would welcome further images and 
photometry.

EDITOR'S ABSENCE
The editor will be away from March 27 giving the opening lecture about 
IYA 2009 at the Wrexham Science Festival and would welcome meeting any 
TA subscribers who intend to visit this event this weekend. I shall 
return on Monday March 30 and during this period Nick James will issue 
any E-Circulars and deal with any potential discovery reports. His 
contact details are in the first page of each issue of TA.

Guy M Hurst