金彰伟 XM59ZX = SN2013fi * 超新星 Ia

POSSIBLE SUPERNOVA IN PGC 2194789
Zhijian Xu(Nanjing,Jiangsu,China) and Xing Gao (Urumqi,Xinjiang,China), report the discovery of a possible supernova (mag approximately 18.1) on a 40-s survey image (limiting mag about 19.0) taken by Xing Gao in Xingming Observation Sky Survey(C42) around Aug.31.89247 UT.using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). Confirm images taken on Sep.1.86779 UT (limiting mag 19.0) and Sep.2.83711 UT(limiting mag 19.0). The new object approximately located at R.A.=03h 04m 38s.56 Decl.=+42°13’49”.4(equinox 2000.0). Which is about 2.9″ east and 2.4″ north of the center of the PGC 2194789. Nothing is visible at this position on archival images taken on Aug.19(limiting mag 18.5),Aug.10(limiting mag 18.5) or on the DSS from Sep.30,1998(limiting mag about 19.7).
NET USNO-A2.0
XM59ZX   C2013 08 31.89247 03 04 38.56 +42 13 49.4          18.1 V      C42
XM59ZX   C2013 09 01.86779 03 04 38.60 +42 13 49.5          17.9 V      C42
XM59ZX   C2013 09 02.83711 03 04 38.55 +42 13 49.2          17.9 V      C42
All images can be seen from: http://www.xjltp.com/XOSS/XM59ZX/XM59ZX.htm
C42,Xingming Observatory,Mt. Nanshan. Observers Z.Xu,X.Gao,Measurers Z.Xu 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.
Electronic Telegram No. 3653
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 2013fi = PSN J03043856+4213494
Zhijian Xu (Nanjing, Jiangsu, China) and Xing Gao (Urumqi, Xinjiang,
China) report the discovery of a possible supernova (mag approximately 18.1)
on a 40-s unfiltered CCD survey image (limiting mag about 19.0) taken by Gao
in the course of the Xingming Sky Survey around Aug. 31.893 UT using a
Celestron C14 0.36-m f/6.9 Schmidt-Cassegrain telescope at Mt. Nanshan.  The
new object located at R.A. = 3h04m38s.57 +/- 0s.03, Decl. = +42d13’49”.4 +/-
0″.2 (equinox 2000.0), which is about 2″.9 east and 2″.4 north of the center
of PGC 2194789.  Nothing is visible at this position on a Digitized Sky
Survey image from 1998 Sept. 30 (limiting mag about 19.7).  Their images have
been posted at website URL http://www.xjltp.com/XOSS/XM59ZX/XM59ZX.htm.  The
variable was designated PSN J03043856+4213494 when it was posted at the
Central Bureau’s TOCP webpage and is here designated SN 2013fi based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2013fi:  Aug. 10 and 19, [18.5 (Gao and Xu); Sept. 1.868, 17.9 (Gao and Xu);
2.837, 17.9 (Gao and Xu); 4.993, 18.1 (Gianluca Masi and Francesca Nocentini;
remotely using a 43-cm telescope at Ceccano, Italy; position end figures
38s.47, 49″.6); 5.365, 18.2 (Joseph Brimacombe, Cairns, Australia; remotely
with a 51-cm RCOS telescope + luminance filter located at the Nex Mexico Skies
observatory near Mayhill, New Mexico, USA; position end figures 38s.58, 49″.2;
image posted at URL http://www.flickr.com/photos/43846774@N02/9736371276/).
Nozomu Tominaga, Konan University; Yuki Kikuchi, University of Tokyo;
Nobuharu Ukita, National Astronomical Observatory of Japan; Kensho Mori,
Hiroshima University; Masaomi Tanaka, National Astronomical Observatory of
Japan; Emiko Matsumoto, Konan University; Tomoki Morokuma, Institute of
Astronomy, University of Tokyo; and Ikuru Iwata, National Astronomical
Observatory of Japan, on behalf of the Kiso Supernova Survey (KISS) project,
report that they obtained a visual-wavelength spectrogram of PSN
J03043856+4213494 = SN 2013fi on Sept. 9.7 UT with the Okayama 188-cm
telescope (+ Kyoto Okayama Optical Low-dispersion Spectrograph).  The
spectrum reveals the transient to be a normal type-Ia supernova at several
days after maximum light.

NOTE: These ‘Central Bureau Electronic Telegrams’ are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2013 CBAT
2013 September 14                (CBET 3653)              Daniel W. E. Green

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