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Swift Observations Of High-z Radio-loud Quasars Detected With BatWe present follow-up Swift observations of 4 high-z radio-loud quasars detected with the BAT during the 15-month survey in 15-150 keV. The 0.5-8-keV spectra are best fitted either with a power law with no excess absorption over the Galactic value (0212+735, 0836+710, 2149--307 in higher state) or by a downward-curved broken power law model (0537--286, 2149--307 in lower state). The BAT spectra integrated over the whole 15 months of the survey are fitted with a single power law, with a range of spectral slopes, Gamma=l.3-2.3. Comparison with previous SAX observations shows that there is a trend for the 15-150-keV continuum to soften with fading intensity; on the contrary, little or no spectral variations are observed at medium-hard X-rays. This may suggest either/both dramatic variability above 10-keV, or/and two separate spectral components.
Document ID
20070006484
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Sambruna, Rita M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tueller, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Markwardt, C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mushotzky, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tavecchio, F.
(Osservatorio Astronomico, Brera Brera, Italy)
Date Acquired
August 24, 2013
Publication Date
January 1, 2006
Subject Category
Space Sciences (General)
Meeting Information
Meeting: High Energy Astrophysics Division (HEAD)
Location: San Francisco, CA
Country: United States
Start Date: October 4, 2006
End Date: October 9, 2006
Sponsors: Eureka Scientific, Inc.
Distribution Limits
Public
Copyright
Other

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