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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 |
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Supernova Mag 17.3CR Date : Feb. 7.60 2006 |
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.