IAU Central Bureau for Astronomical Telegrams

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IAUC 8486: 2005ah; 2005ai; 2004gw, 2005T,, 2005ae; 2005W

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                                                  Circular No. 8486
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2005ah
     L. A. G. Monard, Pretoria, S. Africa, reports his discovery of
an apparent supernova (mag about 17.3 +/- 0.2) on unfiltered ST-7
CCD images taken on Feb. 10.775 UT (confirmed on Feb. 12.758 at mag
about 17.4 +/- 0.2) with a 0.30-m Schmidt-Cassegrain reflector.  SN
2005ah is located at R.A. = 6h00m45s.77, Decl. = -58o35'20".8
(equinox 2000.0), which is 27" west and 8" north of the nucleus of
a galaxy in the cluster Abell S560.  Nothing is visible at this
position on an image from the Digitized Sky Survey (limiting red
mag 20.5) or on an image taken by Monard on Jan. 4.883 (limiting
red mag 18.8).


SUPERNOVA 2005ai IN NGC 2314
     Further to IAUC 8470, T. Puckett and T. Orff report the
discovery of an apparent supernova (mag 15.9) on an unfiltered CCD
frame taken with the 0.60-m automated supernova patrol telescope on
Feb. 12.23 UT (and confirmed on frames taken by D. George, Ottawa,
ON, with a 0.35-m reflector on Feb. 13.13 at mag 15.9; and by T.
Crowley, Chiefland, FL, with a 0.30-m reflector on Feb 13.14, also
at mag 15.9).  The new object is located at R.A. = 7h10m32s.76,
Decl. = +75o21'29".1 (equinox 2000.0), which is 1".0 east and 113"
north of the center of NGC 2314.  Nothing was present at this
position on images taken by Puckett on 2002 Apr. 1 and 2003 Apr. 27
(limiting mag about 20.0).


SUPERNOVAE 2004gw, 2005T, AND 2005ae
     A. V. Filippenko and R. J. Foley, University of California,
Berkeley, report that inspection of CCD spectra (range 300-920 nm),
obtained on Feb. 12 UT with the Keck I 10-m telescope (+ LRIS),
shows that SN 2005ae (IAUC 8480) is probably of type IIb.  The
prominent He I series is indicative of a type-Ib supernova; however,
there is an additional absorption line that corresponds to H_alpha
at a velocity similar to that of the He I lines, which indicates
that the progenitor had a low-mass hydrogen envelope.  SN 2004gw is
indeed of type Ia, as speculated by Foley et al. (IAUC 8465), and
not of type Ic.  Extremely noisy spectra of SN 2005T (IAUC 8473)
reveal it to be of type II, with broad H_alpha and Ca II emission.


SUPERNOVA 2005W IN NGC 691
     Unfiltered CCD magnitudes by E. Prosperi, Larciano, Italy:
Feb. 3.770 UT, 14.8; 6.808, 14.4; 10.759, 14.3.

                      (C) Copyright 2005 CBAT
2005 February 13               (8486)            Daniel W. E. Green

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