[IAUC] IAUC 8691: C/2006 E1; 2006ax, 2006ay, 2006az [25139-2006/04-R1]

Vie Jun 22 17:08:24 ART 2007

                                                  Circular No. 8691
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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COMET C/2006 E1 (McNAUGHT)
     Further to IAUC 8688, R. H. McNaught reports that images taken
with the Uppsala Schmidt telescope by G. J. Garradd on Mar. 18.8 UT
show this comet to be slightly diffuse with an extension about 5"
long to the northwest; additional images taken by McNaught on Mar.
23.7 show a similiar appearance.  Additional astrometry, the
following preliminary orbital elements, and an ephemeris appear on
MPEC 2006-F28.

     T = 2006 Dec. 14.954 TT          Peri. = 230.496
                                      Node  =  94.949   2000.0
     q = 6.10616 AU                   Incl. =  82.985

SUPERNOVA 2006ax, 2006ay, 2006az
     Three new apparent supernovae have been reported from
unfiltered CCD images:  2006ax and 2006ay by D. R. Madison, N. J.
Ponticello, and W. Li (LOSS/KAIT; cf. IAUC 8680), and 2006az by J.
Newton, L. Cox, and T. Puckett (0.35-m reflector at Portal, AZ; cf.
IAUC 8664).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006ax  Mar. 20.37  11 24 03.46  -12 17 29.2  17.1  51" E, 18" N
2006ay  Feb. 24.56  15 59 12.76  +20 44 27.9  19.0  12".2 E, 22".7 S
2006az  Mar. 23.39  12 12 14.68  +56 10 45.8  17.1  1".7 E, 5".8 N

Additional approximate magnitudes for 2006ax in NGC 3663:  Feb.
10.39 UT, [18.5 (KAIT); Mar. 21.15, 16.5 (S. Gonzalez, Las Campanas
Observatory, 1.0-m Swope telescope).  N. Tokimasa, H. Naito, and H.
Yamaoka report that low-resolution spectroscopy obtained on Mar.
21.7 shows 2006ax to be a type-Ia supernova a few days before
maximum light (additional details given on CBET 437).  The offset
for 2006ay above is with respect to the nucleus of the southeast
component of UGC 10116 (a group of six galaxies also known as
'Seyfert's Sextet').  Additional approximate magnitudes for 2006ay:
2002 July 7.30, [19.8; 2006 Feb. 10.56, [18.8; Mar. 21.26, 20 (V-
band image taken by Gonzalez).  Nothing is visible at the location
of 2006ay on the Digitized Sky Survey (limiting red mag about 21;
see also CBET 436).  Additional magnitudes for 2006az in NGC 4172
from Puckett:  Feb. 8, [19.0; Mar. 24.29, 16.3.

                      (C) Copyright 2006 CBAT
2006 March 24                  (8691)            Daniel W. E. Green