金彰伟 XM18ZJ = SN2011aj * 超新星

2月19日晚,在检看当天早上拍摄的星系图片中发现NGC6246A中有超新星,在写上报邮件时徐智坚查看16日晚拍摄的该星系图片发现16日图上该超新星已经可见了,但在1月27日的图片中未发现目标,最后高兴上报二晚数据。
POSSIBLE SUPERNOVA IN NGC 6246A
Zhangwei Jin(Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China), report the discovery of a possible supernova (mag approximately 17.3) on a 60-s survey image (limiting mag about 19.0)taken by Xing Gao in Xingming Observation Sky Survey(C42) around Feb. 18.92222 UT,2011. using a unfilled CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ).the new object approximately located at R.A. =16h 50m 13s.98 Decl.=+55°22’28”.0 (equinox 2000.0). which is 0.6″ west and 37″ South from the center of the galaxy NGC 6246A. We also find the object at the same position taken by C42 on Feb.16 at 17.7mag. Nothing is visible at this position on archival images taken on Jan. 27 (limiting mag 19.5) or on the DSS from Jun 29,1992(limiting mag about 19.5).
NET UCAC-3
XM18ZJ C2011 02 16.92404 16 50 13.97 +55 22 28.0 17.7 V C42
XM18ZJ C2011 02 18.92222 16 50 13.98 +55 22 28.0 17.3 V C42
XM18ZJ C2011 02 22.97648 16 50 13.98 +55 22 28.0 16.8 V C42
XM18ZJ C2011 02 25.95206 16 50 13.92 +55 22 27.7 16.7 V C42
XM18ZJ C2011 03 07.92361 16 50 14.00 +55 22 28.0 16.5 V C42
All images can be seen from: http://www.xjltp.com/XOSS/XM18ZJ/XM18ZJ.htm
C42 Xingming Observatory, Mt. Nanshan. Observers Z.Jin, X.Gao ,Measurers Z.Jin 0.35-m f/6.9 Schmidt-Cassegrain telescope and CCD.
*Electronic Telegram No. 2664*
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 2011aj IN NGC 6246A = PSN J16501398+5522280
Zhangwei Jin (Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang,
China) report the discovery of an apparent supernova (mag approximately 17.3)
near the galaxy NGC 6246A = PGC 59090 on a 60-s survey image (limiting mag
about 19.0) taken by Xing Gao in the course of the Xingming Observation Sky
Survey around Feb. 18.922 UT using an unfiltered CCD with a Celestron C14
0.35-m Schmidt-Cassegrain telescope at Mt. Nanshan. The new object, which was
designated PSN J16501398+5522280 when posted on the Central Bureau’s TOCP
webpage and is here designated SN 2011aj (based on the spectroscopy reported
below), is located at R.A. = 16h50m13s.98, Decl.= +55d22’28”.0 (equinox 2000.0).
Additional approximate magnitudes (unfiltered CCD unless noted otherwise):
1992 June 29, [19.5 (Digitized Sky Survey; via Jin and Gao); 2011 Feb. 16.924,
17.7 (Jin and Gao); 22.397, 16.6 (J. Brimacombe, Cairns, Australia; remotely
using a robotic 0.51-m RCOS telescope + SBIG STL11K CCD camera near Mayhill,
NM, U.S.A.; position end figures 14s.01, 28″.5). The discoverers have posted
their images of 2011?? at URL http://www.xjltp.com/XOSS/XM18ZJ/XM18ZJ.htm.

G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on
behalf of the CfA Supernova Group, reports that a spectrogram (range 340-740
nm) of 2011aj was obtained on Mar. 2 UT by P. Berlind with the F. L. Whipple
Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of
supernova spectra using the “Supernova Identification” code (SNID; Blondin and
Tonry 2007, Ap.J. 666, 1024) shows that 2011aj is a type-Ia supernova a few
days past maximum; the velocity of the Si II 635.5-nm feature, measured at the
absorption minimum, is 8800 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 March 3 (CBET 2664) Daniel W. E. Green

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