Physics
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981msngr..24...15s&link_type=abstract
The Messenger, No.24, P. 15, 1981
Physics
3
Scientific paper
During an observing run on La Silla in 1978 I noticed a preprint from Wright and Kleinmann concerning their recent infrared (IR) observations of a very luminous quasar, 00420388. It had been discovered at Cerro Tololo on objective prism plates by Osmer and Smith. There were several aspects of this object which interested me: it had a large redshift, z = 3.12, and yet its apparent magnitude was brighter than 17 implying a very large luminosity (3C 273 has an apparent magnitude of 13 and z = 0.158); it was not then known to be a radio source .22 Jy at 2.7 GHz); and yet the IR and visual intensity gave a shape to the spectrum which would soon reach a value larger than the radio limit if the spectrum were to be extrapolated to frequencies lower than the IR. In fact, extrapolating the spectrum to 1 mm or 300 GHz yielded a f1ux density greater than 1 Jy which I thought we could measure.
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