Electronic Telegram No. 1811
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2009er
     H. Mikuz, Crni Vrh Observatory, reports the discovery of an apparent
supernova (mag 17.7) by S. Maticic on four unfiltered CCD images (bandpass
roughly equivalent to the R band) taken around May 22.99 UT with the 60-cm
f/3.3 Cichocki reflector in the course of the Comet and Asteroid Search
Program (PIKA) at Crni Vrh Observatory.  The new object is located at R.A. =
15h39m29s.84, Decl. = +24o26'05".3 (equinox 2000.0; uncertainty about 0".2),
which is approximately 8" west and 9" south of the center of a nearby galaxy.
Nothing is visible at this location on archival unfiltered PIKA images
obtained on 2005 June 16 (limiting mag approximately 18.5) and 2009 Mar. 22
(limiting mag approximately 19.5).  Also, nothing is visible at this position
on several Digitized Sky Survey red and blue images from the Palomar Sky
Survey, listed here with approximate limiting magnitudes:  1954 July 2,
blue, [20.5; 1954 July 2, red, [20.0; 1990 May 17, J plate, [20.5; 1992
June 26, F plate, [20.0.  The variable was confirmed on images obtained with
the discovery telescope on 2009 May 23.838 at blue mag 17.6 and red mag 17.3.
An image of 2009er as been posted at the following website URL:
http://www.observatorij.org/vstars/PSN090522/PSN090522.jpg


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 May 24                      (CBET 1811)              Daniel W. E. Green