Multifrequency observations of the quasi-stellar object Ton 1542

D. M. Worrall, J. J. Puschell, F. C. Bruhweiler, H. R. Miller, M. F. Aller, H. D. Aller

Research output: Contribution to journalArticle (Academic Journal)peer-review


The authors present single-epoch multifrequency data for the radio-quiet low-redshift QSO Ton 1542, spanning radio through ultraviolet wavelengths. They measure a 3σ upper limit of 9.2 mJy for the 20.3 GHz flux density. The first ultraviolet spectrum of this object is presented and discussed. The authors find a particularly strong excess of flux density at ≡3000 Å, which is likely to be dominated by Balmer continuum emission. They also find a Lα/Hβ flux ratio of ≡17, which is higher than that usually observed in QSOs.
Original languageEnglish
Pages (from-to)699-704
Number of pages6
JournalPublications of the Astronomical Society of the Pacific
Publication statusPublished - 1 Sept 1984


  • Astronomical Spectroscopy
  • Quasars
  • Radio Emission
  • Ultraviolet Astronomy
  • Balmer Series
  • H Lines
  • Iue


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