NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-10-22 T19:54:21 PDT
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For refcode 2009IAUC.9056A...1S:
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2009IAUC.9056A...1S SUPERNOVA 2009gj IN NGC 134 Circular No. 9056 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVA 2009gj IN NGC 134 Stockdale, C. J.; Rentz, B.; Vandrevala, C. M.; Weiler, K. W.; Immler, S. Van Dyk, S. D.; Panagia, N.; Marcaide, J. M.; Pooley, D.; Sramek, R. A.; Ryder, S. SUPERNOVA 2009gj IN NGC 134 C. J. Stockdale, B. Rentz, and C. M. Vandrevala, Marquette University; K. W. Weiler, Naval Research Laboratory; S. Immler, Goddard Space Flight Center; S. D. Van Dyk, Spitzer Science Center, California Institute of Technology; N. Panagia, Space Telescope Science Institute and Observatory of Catania; J. M. Marcaide, University of Valencia; D. Pooley, University of Wisconsin at Madison; R. A. Sramek, National Radio Astronomy Observatory; and S. Ryder, Anglo-Australian Observatory, report the detection of radio emission near the position of the type-IIb supernova 2009gj (cf. CBETs 1856, 1858) with the Very Large Array radio telescope. Flux density measurements were made at 8.46 GHz (3.5 cm) of 0.33 +/- 0.04 mJy on June 27.43 UT, 0.59 +/- 0.04 mJy on July 2.56, and 1.02 +/- 0.04 on July 11.51. The measured position of the radio emission of R.A. = 0h30m28s.54, Decl. = -33o12'56".2 (equinox 2000.0) is in good agreement with the measured optical position end figures 28s.56, 56".0 (CBET 1856). The following 3-sigma upper limits were measured: at 22.46 GHz (1.3 cm), 1.9 mJy on June 28.45 and 1.5 mJy on July 5.51; at 4.86 GHz (6.0 cm), 0.19 mJy on June 29.44 and 0.38 mJy on July 2.60; and at 1.43 GHz (20 cm), 2.32 mJy on July 2.64. The radio emission has likely been caught on the rise at 3.6 cm. If the object behaves like other known type-IIb supernovae, it should soon start increasing rapidly at longer radio wavelengths. Further study in all wavelength bands, especially radio and x-ray, is warranted. Radio observations at the Very Large Array are continuing. (C) Copyright 2009 CBAT 2009 July 14 (9056) Daniel W. E. Green
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