NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T06:03:11 PDT
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For refcode 2002IAUC.8018A...1S:
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2002IAUC.8018A...1S Circular No. 8018 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVA 2002hh IN NGC 6946 C. J. Stockdale, Naval Research Laboratory (NRL) and National Research Council; R. A. Sramek and M. Rupen, National Radio Astronomy Observatory (NRAO); K. W. Weiler, NRL; S. D. Van Dyk, Infrared Processing and Analysis Center, California Institute of Technology; N. Panagia, European Space Agency and Space Telescope Science Institute; D. Pooley and W. Lewin, Massachusetts Institute of Technology; and S. Myers and G. Taylor, NRAO, report the detection of radio emission from the type-II supernova 2002hh (IAUC 8005, 8007) with the Very Large Array in 'C' configuration: "Radio-flux densities on Nov. 15.25 UT of 0.60 +/- 0.10 mJy at 22.485 GHz (wavelength 1.3 cm) and 0.81 +/- 0.08 mJy at 8.435 GHz (wavelength 3.6 cm) were observed at R.A. = 20h34m44s.25, Decl. = +60o07'19".4 (equinox 2000.0; +/- 0".2 in each coordinate). This is in close agreement with the reported optical position (end figures 44s.29, 19".0; IAUC 8005). On Nov. 8.0, no radio emission was detected at that position, with 3-sigma upper limits of 0.44 mJy at 22.485 GHz and 0.19 mJy at 8.435. Although few conclusions can be drawn from such sparse data, the apparently optically thin character of the radio emission, if confirmed, may indicate that the circumstellar interaction is weak and is evolving unusually rapidly, as was seen for, e.g., SN 1981K. Radio observations are continuing." 2002 November 20 (8018) Daniel W. E. Green
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