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IAUC 8460: 2004gy; 2004gz; V1118 Ori; C/2004 Q2

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IAUC number

                                                  Circular No. 8460
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     Further to IAUC 8454, R. Quimby, C. Gerardy, P. Hoeflich, and
J. C. Wheeler report the discovery of an apparent supernova in
unfiltered CCD images taken on 2004 Dec. 28.45 (at mag about 17.0)
and 31.38 UT (mag about 17.1).  SN 2004gy is located at R.A. =
13h03m58s.42, Decl. = +26o14'03".7 (equinox 2000.0; note that the
R.A. was given incorrectly on CBET 104), which is 5".4 west of the
apparent host galaxy.  ROTSE-IIIb images taken on Dec. 20.46
(limiting mag about 18.0) showed nothing at this position.

SUPERNOVA 2004gz IN MCG +10-23-45
     Further to IAUC 8459, T. Puckett and L. Cox report the
discovery of an apparent supernova (mag 16.4) on an unfiltered CCD
frame taken with the 0.35-m automated supernova patrol telescope on
2004 Dec. 28.43 UT; the new object was confirmed at mag 16.5 on
frames taken by M. Rice and L. Rice (Mayhill, NM, 0.35-m reflector)
on 2005 Jan. 8.47 and at mag 16.3 on a CCD image taken by O.
Trondal (Oslo, Norway, 0.25-m reflector) on Jan. 9.2.  SN 2004gz is
located at R.A. = 16h13m45s.71, Decl. = +61o01'25".9 (equinox
2000.0), which is 1".2 east and 2".5 north of the center of MCG
+10-23-45.  The object is not present on images taken by Puckett on
2004 Aug. 19, Sept. 6, or 23 (limiting mag about 20.0).

     P. Williams, Heathcote, N.S.W., reports that this eruptive
variable (cf. IAUC 4676, 4966), usually near mag 18, appears to be
undergoing an outburst and is near maximum brightness for the first
time since 1997, as indicated by his visual magnitude estimates:
2004 Nov. 14.493 UT, [13.5; Dec. 18.497, [13.5; 2005 Jan. 5.509,
14.0; 5.518, 14.0.  CCD images obtained by C. Bembrick (Mt. Tarana,
N.S.W.; mag V = 14.0) on Jan. 6.5 and by S. Lee (Coonabarabran,
N.S.W.) on Jan. 6.6 confirm the current bright state.

     Total-magnitude and coma-diameter estimates:  2004 Dec. 4.28
UT, 5.3, 16' (C. S. Morris, Fillmore, CA, 10x50 binoculars); 9.25,
4.7, -- (S. J. O'Meara, Volcano, HI, naked eye); 18.33, 4.3, 18'
(Morris; 5o.5 tail in p.a. 28o and 0o.5 fan in p.a. 260o); 25.63,
3.9, 16' (S. Yoshida, Kanagawa, Japan, 7-mm refractor); 30.86, 3.7,
30' (T. Karhula, Virsbo, Sweden, naked eye); 2005 Jan. 6.81, 3.5,
22' (M. Meyer, Kelkheim, Germany, naked eye).

                      (C) Copyright 2005 CBAT
2005 January 10                (8460)            Daniel W. E. Green

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