Central Bureau Electronic Telegrams, 2276, 1 (2010/May-0)
Supernova 2010cp in NGC 4877.
NAKANO S., ITAGAKI K. and YUSA T.
Abstract (from CDS):
S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki (Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 17.5) on unfiltered CCD frames (limiting magnitude 19.0) taken on May 9.581 UT using a 0.60-m f/5.7 reflector (+ Bitran BT-214E camera). The new object is located at R.A. = 13:00:25.79, Decl. = -15:17:19.8 (equinox 2000.0), which is 8" west and 19" south of the center of NGC 4877. Nothing is visible at this position on Itagaki's images from 2007 Feb. 25.708 (limiting mag 18.5) and 2010 May 1.633 (limiting mag 17.5) or on the Digitized Sky Survey (DSS). Itagaki's discovery frame has been posted at http://www.k-itagaki.jp/images/psn4877.jpg.
T. Yusa, Osaki, Japan, reports his confirming unfiltered CCD images of 2010cp at mag 16.8 on May 10.145 (0.25-m f/3.4 reflector + SBIG ST-10XME camera, GRAS Observatory near Mayhill, NM, U.S.A.; limiting mag 19.5) and on May 11.388 (0.41-m f/8.4 reflector + SBIG ST-1001E camera, GRAS Observatory, Moorook, Australia; limiting mag 19.0), measuring position end figures 25s.82 ± 0s.01, 19".8 ± 0".1; nothing was visible at this position on DSS images from 1983 May 10 and 1997 June 2 (red).
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