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Date and Time of the Query: 2019-06-24 T14:43:07 PDT
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For refcode 1994IAUC.6045....1V:
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1994IAUC.6045....1V Circular No. 6045 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVA 1968D IN NGC 6946 S. D. Van Dyk, University of California, Berkeley; S. D. Hyman, Sweet Briar College; R. A. Sramek, National Radio Astronomy Observa- tory; and, K. W. Weiler, Naval Research Laboratory, report the radio recovery of the type-II supernova 1968D in the nearby spiral galaxy NGC 6946: "A candidate source was first found in the summed Very Large Array (VLA) data collected over several years for the monitor- ing of the radio SN 1980K in this galaxy at 20 and 6 cm (1.43 and 4.86 GHz, respectively; see Weiler et al. 1986, Ap.J. 301, 790; Weiler et al. 1992, Ap.J. 398, 248). Detection of the source has been confirmed by additional observations with the VLA in configura- tion A, made in 1994 April at these same wavelengths. SN 1968D has radio position R.A. = 20h33m55s.298, Decl. = +59o59'09".07 (equinox 1950.0). The position of the radio nucleus of NGC 6946 has end figures 49s.245, 58'49".24, giving a nuclear offset for SN 1968D of 45".3 east and 19".8 north, which is in excellent agreement with the optical offset position obtained near the time of discovery (IAUC 2057; Barbon et al. 1989, A.Ap. Suppl. 81, 421). The super- nova has flux densities 0.15 +/- 0.03 and 0.52 +/- 0.03 mJy at 6 and 20 cm, respectively. The source is therefore nonthermal, with a steep spectral index R.A. = -1.02 +/- 0.15." 1994 August 2 (6045) Daniel W. E. Green
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