White, Glenn J. and Ricketts, Martin J.
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Observations of the quasar 3C273 made during 1975-77 have shown that the X-ray flux varied on a time scale of several months. No similar variation was present in radio and optical data taken at similar times. If this variation results from luminosity variations of a central compact object, then an upper limit of ≤4 x 1017cm can be set on its dimensions.
|Item Type:||Journal Article|
|Copyright Holders:||1979 Royal Astronomical Society|
|Keywords:||light curve; quasars; statistical analysis; x-ray astronomy; Compton effect; luminous intensity; stellar luminosity|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||G. J. White|
|Date Deposited:||28 Mar 2012 13:30|
|Last Modified:||24 Feb 2016 09:21|
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