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王彬 XM06BW =SN2013do * 超新星 IIP

6月17日上午  王彬在查看拍摄的超新星搜索图片 PGC 69439中发现了一个疑似目标,目标很明显,,确认为真实未知目标后上报。

Bin Wang(Shaoxing, Zhejiang, China) and Xing Gao
(Urumqi,Xinjiang,China), report the discovery of a possible supernova
(mag approximately 17.0) on a 40-s survey image (limiting mag about
19.5)taken by Xing Gao in Xingming ObservationSky Survey(C42) around
Jun.16.82392 UT. using an unfiltered CCD ( + Celestron C14
Schmidt-Cassegrain telescope D=350-mm @f/6.9 ). The new object
approximately located at R.A. =22h 39m 50s.67
Decl.=+38°12’44”.3(equinox 2000.0). Which is about 14.0″ east and
11.2″ south of the center of the  PGC 69439. Nothing is visible at
this position on archival images taken on Jun. 01(limiting mag 19.0 or
on the DSS from Sep. 03,1989(limiting mag about 19.8).

NET USNO-A2.0
XM06BW   C2013 06 16.82392 22 39 50.67 +38 12 44.3          17.0 V      C42

All images can be seen from: http://www.xjltp.com/XOSS/XM06BW/XM06BW.htm
C42,Xingming Observatory,Mt. Nanshan. Observers B.Wang,X.Gao,Measurers
B.Wang 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD

From: CBET: Supernovae: Daniel W. E. Green
Date: 2013/7/1
Subject: SUPERNOVA 2013do IN UGC 12137 = PSN J22395067+3812443
T

SUPERNOVA 2013do IN UGC 12137 = PSN J22395067+3812443
Electronic Telegram No. 3571
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 2013do IN UGC 12137 = PSN J22395067+3812443
Bin Wang, Shaoxing, Zhejiang, China; and Xing Gao, Urumqi, Xinjiang,
China, report the discovery of a possible supernova (mag approximately 17.0)
on an unfiltered 40-s CCD survey image (limiting mag about 19.5) taken by
Xing Gao in the course of the Xingming Sky Survey around June 16.824 UT using
a 36-cm Celestron C14 Schmidt-Cassegrain telescope at Mt. Nanshan.  The new
object is approximately located at R.A. = 22h39m50s.67, Decl. = +38d12’44”.3
(equinox 2000.0), which is about 14″.0 east and 11″.2 south of the center of
UGC 12137 = PGC 69439.  Nothing is visible at this position on a Digitized
Sky Survey image from 1989 Sept. 3 (limiting mag about 19.8).  The Xingming
images are posted at website URL http://www.xjltp.com/XOSS/XM06BW/XM06BW.htm.
The variable was designated PSN J22395067+3812443 when it was posted at the
Central Bureau’s TOCP webpage and is here designated SN 2013do based on the
spectroscopic confirmation reported below.
Additional CCD magnitudes for 2013d  2013 June 1, [19.0 (Wang and Gao);
17.763, 17.0 (Joseph Brimacombe, Cairns, Australia; 41-cm telescope + infrared
filter; bandpass > 700 nm; position end figures 50s.65, 43″.5; image posted at
URL http://www.flickr.com/photos/43846774@N02/9074451038/); 18.253, 18.1 (L.
Elenin, Lyubertsy, Russia, and I. Molotov, Moscow; three 150-s images taken
remotely with a 0.45-m f/2.8 telescope at the ISON-NM Observatory near
Mayhill, NM, USA; position end figures 50s.54 +/- 0″.18, 44″.8 +/- 0″.19;
UCAC-4 reference stars; limiting mag about 18.8; image posted at website URL
http://spaceobs.org/images/TOCP/PSNJ22395067+3812443-20130618.png); 21.832,
17.2 (Wang and Gao; position end figures 50s.69, 44″.3); 22.819, 17.1 (Wang
and Gao; position end figures 50s.70, 43″.3).

A. A. Rachubo and D. C. Leonard, San Diego State University; K. Follette,
P. Sheehan, and D. McCarthy, University of Arizona; J. Moustakas, Siena
College; V. Bailey, J. Barrows, E. Bosset, E. Buckley, D. Burd, J. Calahan,
I. Ceesay, E. Douglas, C. Feeney, T. Fornari, A. Fox, H. Fishwick, H. Gano,
C. Green, J. Griggs, K. Hart, S. Hart, K. Hartman, A. Holt, E. Hooper, S.
Hume, S. Jaeggli, D. Lesser, M. Kerr, C. Kopans-Johnson, K. Kumar, A. Lackey,
S. Laube, E. Marshall, M. Martinez, G. Mehta, K. Melbourne, M. Meshel,
C. Myers, E. Puranen, A. Schlingman, W. Schlingman, W. M. Schlingman, K.
Shen, N. Stock, C. Stillman, J. Tinker, and B. Whitesell, 2013 Advanced Teen
Astronomy Camp, report that inspection of a low-dispersion optical spectrum
(range 350-660 nm) of PSN J22395067+3812443 = SN 2013do, obtained with the
2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Steward Observatory
on June 26 UT, shows it to be a type-II supernova.  Cross-correlation with a
library of supernova spectra using the “Supernova Identification” code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) finds best matches with a number of
normal type-IIP supernovae ranging in age from about one to two weeks after
maximum light.  Adopting the recession velocity for UGC 12137 of 4685 km/s
(Wegner et al. 1993, A.J. 105, 1251; via the NASA/IPAC Extragalactic Database),
an expansion velocity of 8900 km/s is derived from the position of the H_beta
(rest wavelength 486.1 nm) minimum.

S. Tinyanont, Harvey Mudd College; Y. Cao, California Institute of
Technology; and M. M. Kasliwal, Observatories of the Carnegie Institution and
Princeton University, report that spectroscopic observations (range 330-1000
nm) of PSN J22395067+3812443 = SN 2013do were obtained on June 27.27 UT with
the Dual Imaging Spectrograph on the 3.5-m ARC telescope at Apache Point
Observatory.  The spectrum shows prominent H-alpha emission with a P-Cyg
profile.  The minimum of the H-alpha absorption is at 642.5 nm.  Using the
redshift z = 0.015627 for UGC 12137 (from Wegner et al. 1993, A.J. 105, 1251;
via NED), this corresponds to a velocity of 11000 km/s.  Running the SNID
software, the spectrum resembles SN 2004et at fifteen days after maximum,
indicating that 2013do is a type-II-P supernova.

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

(C) Copyright 2013 CBAT
2013 July 1                      (CBET 3571)              Daniel W. E. Green

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