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The Variability and Spectrum of NGC 4051 from Deep, Simultaneous EUVE and XTE ObservationsWe present timing and spectral analysis of the data collected by the Extreme Ultraviolet Explorer Satellite (EUVE) for the Seyfert 1 galaxy NGC 4051 during 1996. NGC 4051 was observed twice in May 1996 and again in December 1996 for a total of more than 200 ksec. The observations were always simultaneous with hard X-ray observations conducted with the X-Ray Timing Explorer (XTE). The EUVE light curves are extremely variable during each observation, with the maximum variability during May 1996 when we registered changes by a factor of 21 over 8 hours and more than a factor of 24 variations from peak to minimum. We detected signal in the EUVE spectrograph in the 75-100 Arange which is well fitted by absorbed power law models. We will illustrate the results of our spectral and detailed power spectrum analysis for the simultaneous EUVE and XTE spectra and light curves and discuss the consequences on possible emission mechanisms.
Document ID
19990111694
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Fruscione, Antonella
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Cagnoni, Ilaria
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Papadakis, Iossif
(Southampton Univ. United Kingdom)
McHardy, Ian
(Southampton Univ. United Kingdom)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NAS8-39073
Distribution Limits
Public
Copyright
Other

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