Electronic Telegram No. 1260
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 2008ak IN UGC 2519
     T. Boles, Coddenham, England, reports the discovery of an apparent
supernova (mag 18.5) on an unfiltered CCD image taken on Feb. 12.774 UT with
a 0.35-m reflector; confirming images obtained on Feb. 15.766 yield mag 18.6.
The new object is located at R.A. = 3h09m25s.20 +/- 0s.03, Decl. =
+80o07'48".4 +/- 0".1 (equinox 2000.0), which is approximately 17".0
east and
1".8 south of the center of UGC 2519.  Boles measures end figures 25s.01,
48".0 from a confirming image acquired by E. Pettarin (Farra d'Isonzo, Italy,
0.40-m reflector) on Feb. 14.743.  Nothing is present at this position on
Boles' images from 2007 Nov. 15 and Dec. 16 (limiting mag 19.5) or on
Digitized Sky Survey plates from 1994 Oct. 10 (limiting red mag 20.5) and
1994 Oct. 5 (limiting blue mag 21.0).
     A. Dimai, Cortina d'Ampezzo, Italy, on behalf of the CROSS program (cf.
IAUC 7373), reports the independent discovery of 2008ak (at mag about 16.7;
later revised to 17.5) by Elisa Londero (Gemona, Italy) in two unfiltered
CCD images (limiting magnitude about 18.5) taken with the 0.5-m "Ullrich"
telescope of the Col Drusci Observatory on Feb. 13.75 UT, providing position
end figures 24s.76, 51".0 (offset about 14" east and 0".5 south of
the
galaxy's nucleus).  Confirming images (limiting mag 19.0) on Feb. 15.75
yield mag about 17.0 for 2008ak; position end figures provided with the
confirmation e-mail are 25s.15, 48".2 (offset 14" east, 1".5 south). 
CROSS
images of the same field taken on 2007 Dec. 19 showed nothing at this
position (limiting mag about 19.0), and it does not appear on Palomar Sky
Survey infrared, red, and blue plates.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 February 15                 (CBET 1260)              Daniel W. E. Green

testo della CBET 1267 del 21/02/2008 con lo spettro della SN2008ak

                                                  Electronic Telegram No. 1267
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 2008ak IN UGC 2519
     E. Y. Hsiao, M. L. Graham, C. J. Pritchet, and D. Balam, Department of
Physics and Astronomy, University of Victoria, report that a spectrogram
(range 390-703 nm, resolution 0.3 nm) of 2008ak (cf. CBET 1260) obtained on
Feb. 21.19 UT with the 1.82-m Plaskett Telescope of the National Research
Council of Canada, shows it to be a type-II supernova several days past
maximum light.  Cross-correlation with a library of supernova spectra using
the "superfit" matching program of Howell et al. (2005, Ap.J. 634, 1190)
indicates that 2008ak is most similar to the type-II supernova 1999em (cf.
IAUC 7294, 7296) at four days past maximum.  The spectrum shows a wide
emission feature of H_alpha (FWHM about 7000 km/s) showing a P-Cyg profile.
A narrow H_alpha emission (FWHM = 450 km/s) is visible at the redshift of
the host galaxy.


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

                         (C) Copyright 2008 CBAT
2008 February 21                 (CBET 1267)              Daniel W. E. Green