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Supernova 2006Y in anonymous galaxy near ESO 207-G26



Anonymous galaxy in Carina
Dist. ?? million l.y. (?)


Supernova Mag 17.7:CR

Date : Feb. 3.58 2006

Exposure time : 60 sec.
0.35m f/11.4 AP-6 CCD








Supernova Mag 17.3CR

Date : Feb. 7.60 2006




Photometry reference image.

IAU Circulars & Type determination for SN 2006Y

                               Circular No. 8668

 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)


 SUPERNOVAE 2006Y AND 2006Z
     Two apparent supernovae have been reported:  2006Y by P.
 Luckas, O. Trondal, and M. Schwartz (cf. IAUC 8655; unfiltered CCD
 frames, 0.35-m Tenagra telescope at Perth) and 2006Z by the SDSS
 collaboration (found in spectra; communicated by M. SubbaRao,
 University of Chicago and Adler Planetarium; cf. IAUC 8513; r-band
 magnitude given below).

 SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
 2006Y   Feb. 3.58    7 13 17.19  -51 41 18.8  17.7  1".7 W, 5".2 N
 2006Z   Feb. 1.51   13 44 58.07  +26 18 25.7  20.4      --

 Additional unfiltered magnitudes of 2006Y:  Jan. 27.59 UT, [18.5;
 Feb. 7.60, 17.3.  SN 2006Z, which appears to be a type-Ia supernova
 with an age of approximately -7 +/- 4 days after maximum light, is
 coincident with the center of the host galaxy (r = 17.0 from an
 image taken on 2004 June 12; z = 0.1232).

                      (C) Copyright 2006 CBAT
 2006 February 8                (8668)            Daniel W. E. Green



                     Electronic Telegram No. 422

  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://cfa-www.harvard.edu/iau/cbat.html
  
  
  SUPERNOVAE 2006Y AND 2006ai
       N. Morrell and G. Folatelli, on behalf of the Carnegie Supernova
  Project, report that spectroscopy (range 380-930 nm) of SN 2006Y (cf.
  IAUC 8668), obtained on Feb. 27.14 UT with the Las Campanas 2.5-m du
  Pont telescope (+ WFCCD spectrograph), showing it to be a type-II
  event, nearly one month after explosion.  A spectrum of the apparent
  nucleus of the host galaxy was also obtained, from which is derived a
  recession velocity of 10074 km/s (redshift 0.0336 +/- 0.0001).  From
  nebular emission lines superimposed on the supernova spectrum, a
  slightly different redshift of 0.0333 +/- 0.0001 is derived; using
  this value, an expansion velocity of 7650 km/s for this supernova is
  derived from the minimum of the H_beta absorption.  A redshift of
  0.0341 +/- 0.0002 was also measured for ESO 207-G27 (a galaxy located
  southeast of the supernova host).
       A spectrum of SN 2006ai (cf. IAUC 8674), obtained on Mar. 5.12 with
  the same instrumental configuration, shows it to be a type-II supernova,
  at least one month after explosion, for which an expansion velocity of
  8050 km/s is derived from the minimum of the H_beta absorption,
  considering a redshift of 7426 km/s (z = 0.0158 +/- 0.0001) measured
  from emission lines in the spectrum of the host galaxy.
  
  
  NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
        superseded by text appearing later in the printed IAU Circulars.
  
                           (C) Copyright 2006 CBAT
  2006 March 7                     (CBET 422)               Daniel W. E.Green



And here is our report :

 SUPERNOVA 2006Y IN ANONYMOUS GALAXY
 
P. Luckas, Perth, W. Australia; O. Trondal, Oslo, Norway; and M.Schwartz, Patagonia, AZ, report the discovery of an apparent supernova in an anonymous galaxy on unfiltered CCD frames taken with a 0.35-m Tenagra telescope at Perth on 2006 Feb. 3.58 (at mag 17.7) and Feb. 7.60 UT (mag 17.3) in the course of the Tenagra Observatory Supernova Search.
SN 2006Y is located at R.A. = 7h13m17s.19, Decl. = -51o41'18".8 (equinox 2000.0), which is 1".7 west and 5".2 north of the center of the anonymous galaxy (which itself has position R.A. = 7h13m17s.37, Decl. = -51o41'24".0 (equinox 2000.0)). Nothing was visible at the position of 2006Y on an image taken by Luckas on 2006 Jan. 27.59 (limiting magnitude about 18.5).