A PTF függetlenül megtalálta, és már spektrumuk is van.

Sry


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The Astronomer´s Telegram                   http://www.astronomerstelegram.org

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ATEL #3398      ATEL #3398

Title: PTF Discovery of a Type II Supernova in M51
Author: J. M. Silverman, A. V. Filippenko, S. B. Cenko (UC Berkeley)
report on behalf of a larger collaboration:
Queries: cenko@astro.berkeley.edu
Posted: 3 Jun 2011; 09:15 UT
Subjects:Optical, Supernovae

The PTF (ATEL #1964, #3253; http://www.astro.caltech.edu/ptf/; Law et al.
2009, PASP, 121, 1395; Rau et al. 2009, PASP, 121, 1334) reports the discovery
of a new supernova in M51. This object was independently discovered first
by A. Riou and reported as PSN J13303600+4706330.  PTF discoveries are
made by autonomous PTF software, as well as by the Galaxy Zoo Supernova
Project (Smith et al. 2011, MNRAS, 412, 1309; http://supernova.galaxyzoo.org
).

Name     | RA (J2000)  | Dec (J2000) | Discovery | Mag  | Redshift | Type

| Spec.  | Phase | Instrument     | Notes
PTF11eon | 13 30 05.08 | +47 10 11.2 | Jun 01.19 | 13.5 | 0.002    | SN
II
| Jun. 2 |       | Keck I+ LRIS   | exact magnitude uncertain due to
saturation

The spectrum shows a relatively blue continuum, with well-developed P-Cygni
profiles in the Balmer series.  After removal of the host-galaxy recession
velocity of 600 km/s (Rush, et al. 1996, ApJ, 473, 130), the minimum of
the H-alpha absorption is blueshifted by about 17,600 km/s.

PTF is a collaboration of Caltech, LCOGT, the Weizmann Institute, LBNL,
Oxford, Columbia, IPAC, and Berkeley.

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Password Certification: S. Bradley Cenko (cenko@astro.berkeley.edu)
http://www.astronomerstelegram.org/?read=3398
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