u-lab.nagoya university
Furo-cho,Chikusa,Nagoya,464-8602
Phone. +81-52-789-2921(Office)@Fax. +81-52-789-2919
 
Home Uir Site map japanese
ƒwƒbƒ_[
Œ€‹†ŽΊΠ‰ξ Œ€‹†ƒvƒƒWƒFƒNƒg Œ€‹†ŠT—v Œ€‹†¬‰Κ ƒAƒNƒZƒXƒ}ƒbƒv ‚¨–β‚’‡‚ν‚Ή ŠΦ˜AƒŠƒ“ƒN
Œ€‹†¬‰Κ
˜_•Ά
1990~1999
2000~
1990~ mJn
Doctor
Master mJn
V•·‹LŽ–
 
../publication

Simultaneous multifrequency observations of the Seyfert 1 galaxy NGC4051: Constant optical-infrared emission observed during large-amplitude X-ray variability

C. Done, M. Ward, A. Fabian, H. Kunieda, S. Tsuruta, A. Lawrence, M. Smith, and W. Wamsteker

Abstract

Simultaneous infrared, optical, ultraviolet, and X-ray observations of the low-luminosity Seyfert 1 galaxy, NGC 4051 are reported. A new method of reduction was developed to correct the optical flux for atmospheric variations due to seeing and extinction. The X-ray flux varied by factors of up to 2 on time-scales of tens of minutes, while the optical flux remained steady to within 1 percent. The results rule out all models, including Compton scattering and synchrotron models, in which a single electron population is responsible for the formation of both the infrared-to-optical and the X-ray spectra. The optical emission region must be an order of magnitude larger than, or completely separate from, the X-ray source.

 
Copyright (c) 2008 Nagoya University . All Rights Reserved.