SN 2011fv in ngc459 - 26 agosto 2011

Stampa

SN 2011fv (A.R. 01 18 07.80, Dec. +17 33 29.8) scoperta il 26 agosto 2011 nella galassia NGC 459 (offset 6W 15S), magnitudine 18.2, tipo II.

SN scoperta da F. Ciabattari ed E. Mazzoni con il telescopio Newton da 50cm dell'Osservatorio di Monte Agliale (Lucca).

NGC 459 è una galassia Sbc nella costellazione dei Pesci, distante 175 Mpc, magnitudine 14.7.

                                                  Electronic Telegram No. 2828
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
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SUPERNOVA 2011fv IN NGC 459 = PSN J01180780+1733298
F. Ciabattari and E. Mazzoni, Borgo a Mozzano, Italy, report the discovery
of a possible supernova (mag 18.2) on unfiltered CCD images (limiting mag 19.1)
obtained on Aug. 26.08 UT with a 0.5-m Newtonian telescope in the course of the
Italian Supernovae Search Project. The new object is located at R.A. =
1h18m07s.80, Decl. = +17d33'29".8 (equinox 2000.0; astrometry with respect to
UCAC-2 stars), which is 6" west and 15" south of the center of the galaxy NGC
459. Nothing is visible at this position on digitized plates of the Palomar
Sky Survey from 1987 Aug. 24 (J plate; limiting magnitude 20.3) and 1989 Nov.
4 (F plate; limiting magnitude 20.3). The variable was designated as PSN
J01180780+1733298 when it was posted on the Central Bureau's TOCP webpage and
is here designated SN 2011fv based on the spectroscopy reported below.
Additional unfiltered CCD magnitudes for 2011fv: Aug. 30.08, 18.1 (Ciabattari
and Mazzoni; limiting mag 19.8); 31.24, 18.1 (R. A. Koff, Bennett, CO, USA;
Meade 0.25-m f/10 Schmidt-Cassegrain reflector + Apogee AP-47p camera; image
scale 2"/pixel; limiting mag 18.9; position end figures 07s.69, 28".7); Sept.
3.408, 18.4 (Joseph Brimacombe, Cairns, Australia; position end figures 07s.81,
29".2); 6.094, 18.1 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.38-m
f/6.8 reflector; position end figures 07s.82, 29".4; image posted at website
URL http://www.astrogeo.va.it/pub/TOCP/PSN_N459.jpg). Brimacombe's image is
posted at website URL http://www.flickr.com/photos/43846774@N02/6109744229/.

L. Tomasella, S. Valenti, P. Ochner, S. Benetti, and E. Cappellaro,
Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica; and A.
Pastorello, Dipartimento di Astronomia, Universita di Padova, on behalf of a
larger collaboration, report that a spectrogram (range 360-810 nm; resolution
2.2 nm) of PSN J01180780+1733298 = SN 2011fv, obtained on Sept. 24.04 UT, is
that of a type-II supernova. Together with P-Cyg Balmer H lines, Fe II
features are clearly detected, suggesting that the supernova was observed a
few weeks after its explosion.


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

(C) Copyright 2011 CBAT
2011 September 25 (CBET 2828) Daniel W. E. Green