Sziasztok!

Kuli Zolivan nagyon belenyúltunk, működik a PISTA koncepciója. Ezer
köszönek Vinkó Józsinak, aki nélkül nem sokra mennénk. Egyébként ez a
Piszkés-tetőn felfedezett 50. szupernóva.

Sry


---------- Forwarded message ----------
Date: Tue,  5 Apr 2011 23:13:45 +0200 (CEST)
From: Lucia
To: sky@titan.physx.u-szeged.hu
Subject: CBET 2682: 20110406 : SUPERNOVA 2011ba = PSN J08230906+1604170


                                                   Electronic Telegram No. 2682
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.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2011ba = PSN J08230906+1604170
      K. Sarneczky, Konkoly Observatory; and Z. Kuli, Hungarian Astronomical
Association, report their discovery of a possible supernova (mag 19.6) in
30-min co-added unfiltered CCD images (limiting mag 21.5) taken on Mar. 24.81
UT with the 0.60-m Schmidt telescope at Konkoly Observatory at Piszkesteto,
Hungary.  The new object is located at R.A. = 8h23m09s.06, Decl. =
+16d04´17".0 (equinox 2000.0).  Nothing is visible at this position on a
Sloan Digital Sky Survey image (no information given regarding bandpass,
date, or limiting magnitude).  This object was designated PSN J08230906+1604170
when posted on the Central Bureau´s TOCP webpage and is designated SN 2011ba
here based on the spectroscopy reported below.  Additional unfiltered
magnitudes for PSN J08230906+1604170 with the Schmidt telescope:  Jan. 3.96 UT,
[20.5; Mar. 8.85, [21.8 (J. Kelemen and Sarneczky); 25.81, 19.6; 28.77, R =
19.5, B = 20.1 (Sarneczky and Kuli); 30.81, R = 19.6 (Sarneczky and Kuli).
      Additional unfiltered CCD magnitudes by Joseph Brimacombe (Cairns,
Australia) for 2011ba from images obtained remotely:  Mar. 27.456 UT, 19.9
m(40.6-cm RCOS telescope + U9000 camera at Macedon Ranges Observatory,
near
Melbourne, Australia; position end figures 09s.13, 16".2); 28.151, 19.8
(51-cm RCOS telescope + STL11K camera at New Mexico Skies Observatory, Mayhill,
NM, U.S.A.; position end figures 09s.09, 16".3).  Brimacombe´s image from Mar.
28 is posted at http://www.flickr.com/photos/43846774@N02/5578391946/.

      J. Vinko, University of Szeged; G. H. Marion, Harvard-Smithsonian Center
for Astrophysics and University of Texas; and J. C. Wheeler, University of
Texas, report that a spectrum of PSN J08230906+1604170 = SN 2011ba, obtained on
Apr. 1.2 UT with the 9.2-m Hobby-Eberly Telescope (+ Marcario Low-Resolution
Spectrograph) by J. Caldwell, shows it to be a type-Ia supernova.  The
spectrum shows the prominent Si II 635.5-nm feature and several other
spectral features that are characteristic of a normal type-Ia supernova at or
a few days after maximum light.  According to SNID tool (Blondin and Tonry
2007, Ap.J. 666, 1024), the spectrum closely resembles that of SN 2001ay at
three days after maximum.  The median redshift estimated from the supernova
features is z = 0.144.  Adopting this redshift, the photospheric velocity
from the blueshift of the Si II 635.5-nm feature is about 12400 km/s.


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

                          (C) Copyright 2011 CBAT
2011 April 6                     (CBET 2682)              Daniel W. E. Green