Electronic Telegram No. 2318
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2010dz
     J. Newton and T. Puckett reported the discovery of a possible supernova
(mag 18.1) on unfiltered CCD images (limiting mag 18.8) taken with a 0.40-m
reflector at Portal, AZ, U.S.A., on May 31.26 UT in the course of the
Puckett Observatory Supernova Search.  The new object, which was confirmed at
mag 18.1 on images (limiting mag 18.9) taken by T. Orff on June 2.22 with a
0.40-m reflector at Portal, is located at R.A. = 13h50m44s.39, Decl. =
+17o03'58".5 (equinox 2000.0), which is 132" west and 47" north of the center
of UGC 8755.  Nothing is visible at this position on images taken by Puckett
on 2010 May 20 (limiting mag 19.2) or in any images of this galaxy taken by
Puckett over the past ten years.
     After posting on the Central Bureau's unconfirmed-objects webpage,
D. D. Balam, Dominion Astrophysical Observatory, National Research Council of
Canada, reports that he finds an object with magnitude V = 19.35, colors B-V
= 0.0 and V-R = +0.15, and position end figures 44s.42, 58".4 on CCD images
(limiting mag around 21.8) taken with the 1.82-m Plaskett Telescope on June
8.29 UT, adding that there is a very faint galaxy very close to that position,
which has magnitudes g = 22.0, r = 21.6, and i = 21.6 in the Sloan Digital Sky
Survey (position end figures 44s.29, 58".6, with Balam's independent
astrometry agreeing to within the measuring uncertainty), with 2010dz being
located 1".4 east of the very faint galaxy.  Another faint galaxy (with g =
22.2, r = 21.4; SDSS J135044.39+170405.6) is located 7".1 due south of 2010dz.
Nothing is visible at the position of 2010dz on the SDSS images to a limiting
magnitude fainter than g = 22 (and perhaps near g = 23).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 June 11                     (CBET 2318)              Daniel W. E. Green