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Date and Time of the Query: 2019-08-23 T08:38:58 PDT
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For refcode 1992IAUC.5573....1M:
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1992IAUC.5573....1M Circular No. 5573 Central Bureau for Astronomical Telegrams SUPERNOVA 1992ao IN NGC 7637 R. H. McNaught, Anglo-Australian Observatory, reports his dis- covery of a supernova (mag about 17) in NGC 7637 on an R plate tak- en by Q. A. Parker with the U.K. Schmidt Telescope on July 28.65 UT. The supernova is located at R.A. = 23h23m06s.54, Decl. = -82 10'15".6 (equinox 1950.0, uncertainty in each coordinate 0".4), or 53".5 east and 56".7 north of the galaxy's center. A nearby star of similar brightness has end figures 01s.37, 09'51".3. M. Della Valle, European Southern Observatory; and R. Gilmozzi, Space Telescope Science Institute, report: "Flux-calibrated CCD spectra (range 390-800 nm, resolution about 1.8 nm) obtained on July 31.3, Aug. 1.3, and 2.3 UT, with the 3.6-m and 2.2-m tele- scopes (+ EFOSC) at La Silla, show this object to be a type-II sup- ernova at an early stage. Preliminary analysis reveals not-yet- prominent broad emission lines of H-beta and H-gamma, flanked by P- Cyg absorptions, superimposed on a strong blue continuum. H-alpha appears flat and wide, possibly coupled with a weak P-Cyg profile. Other P-Cyg profiles are measured at 509 and 578 nm, possibly due to Fe II (517.9 nm) and He I (587.6 nm). All the peaks of the emissions appear blue-shifted in the galaxy rest frame by about 3 nm. In some respects, SN 1992ao may bear similarity to SN 1979C (see Panagia et al. 1980, MNRAS 192, 861). The mean expansion velocity derived from the minimum of the P-Cyg absorptions is about 8500 km/s." 1992 August 3 (5573) Daniel W. E. Green
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