S. Nakano, Sumoto, Japan, reports the discovery by Yoji Hirose, Chigasaki, Kanagawa-ken, of an apparent supernova (V = 14.5) on five unfiltered CCD frames (limiting mag 17) taken on Jan. 29.398-29.501 UT with a 0.25-m f/6.3 Schmidt-Cassegrain reflector. Hirose reported the new object as being 274" west and 93" south of the center of M74 (= NGC 628). Nothing was visible at this location on his CCD frames taken on Jan. 3. R. Kushida, Yatsugatake South Base Observatory, reports the following precise position (measured by Y. Kushida) for SN 2002ap from an unfiltered CCD image taken on Jan. 30.382, with the star at mag 13.7: R.A. = 1h36m23s.85, Decl. = +15o45'13".2 (equinox 2000.0), or 258" west and 108" south of the center of M74. No star is visible at this position on Kushida's survey frames taken from 1994 to 2001 Dec. 18 (limiting mag 17-18). W. Li, University of California, reports that an image taken with the Katzman Automatic Imaging Telescope (KAIT) on Jan. 29.2 showed the new object at mag 14.4. Li also measured position end figures for SN 2002ap: 23s.87, 13".0. A KAIT image taken on Jan. 25.2 showed nothing at this position (limiting mag about 18.0).
International Astronomical Union Circular
- Pub Date:
- January 2002