NDLI: Contemporaneous iue, euve, and high-energy observations of 3c 273

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Contemporaneous iue, euve, and high-energy observations of 3c 273

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hartman, R. C. McHardy, I. M. Bruhweiler, F. C. Fruscione, A. vonMontigny, C. Ramos, E. Kafatos, M. Titarchuk, L. G.
Copyright Year	1997
Description	We present the results of our 1994 January and 1995 January observations of the quasar 3C 273 obtained with the International Ultraviolet Explorer (IUE) and the Extreme-Ultraviolet Explorer (EUVE). These observations were part of a large multiwavelength campaign to observe 3C 273 from radio through gamma-rays. Our 1995 January photometric observations with the EUVE Lexan/B Deep Survey (DS) instrument indicate strong evidence for variability, at a 99% confidence level, during the 12 day observing period. We have utilized ROSAT PSPC soft X-ray power-law models to correlate with EUVE count rates. Besides variations in the normalization level between both observations, our EUV count rates are consistent with a simple power-law model with spectral index alpha approx. 1.77 (F(sub upsilon) proportional to upsilon(sup -alpha) that can be extrapolated from the soft X-rays to the EUV range. The active galactic nucleus 3C 273 is an important blazar to study because in our picture it reveals the presence of both disk and relativistic beam spectral contributions.
File Size	541289
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980201788
Archival Resource Key	ark:/13960/t47q3xf4c
Language	English
Publisher Date	1997-06-10
Access Restriction	Open
Subject Keyword	Astronomy Rosat Mission Quasars Extreme Ultraviolet Explorer Satellite Ultraviolet Spectra Images Radar Astronomy Blazars Radio Observation Confidence Limits Active Galactic Nuclei Iue Sky Surveys Astronomy Extreme Ultraviolet Radiation Ultraviolet Astronomy Photometry Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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