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X-ray spectral variability of 3C273 |
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| Authors: | M J L Turner T Courvoisier R Staubert D Molteni J Trumper |
| Institution: | (1) X-ray Astronomy Group, University of Leicester, LE1 7RH, Leicester;(2) STECF, Garching, West Germany;(3) University of Tubingen, West Germany;(4) University of Palermo, Italy;(5) MPE, Garching, W. Germany |
| Abstract: | 3C273 has been monitored by EXOSAT over the period December 1983 to June 1984 in 4 observations. In the December observation the flux was high and the spectrum showed a power law index of 1.5 changing to 0.9 at 8 keV. In subsequent observations the flux dropped to40% of its original value and the hard tail disappeared. In the last observation the LE flux increased by a factor of 2 with no accompanying ME flux increase. |
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