The EXOSAT spectral survey of AGN
TJ Turner, KA Pounds - … Society (ISSN 0035-8711), vol. 240 …, 1989 - adsabs.harvard.edu
Results are presented from EXOSAT Observations of 48 hard X-ray selected Seyfert type
active galactic nuclei (AGN). These include all 30 of the emission line AGN in the Piccinotti …
active galactic nuclei (AGN). These include all 30 of the emission line AGN in the Piccinotti …
The multiwavelength variability of 3C 273
Aims. We present an update of the 3C 273's database hosted by the ISDC, completed with
data from radio to gamma-ray observations over the last 10 years. We use this large data set …
data from radio to gamma-ray observations over the last 10 years. We use this large data set …
30 years of multi-wavelength observations of 3C 273
We present a wide multi-wavelength database of most observations of the quasar 3C 273
obtained during the last 30 years. This database is the most complete set of observations …
obtained during the last 30 years. This database is the most complete set of observations …
[HTML][HTML] EGRET observations of the north galactic pole region
P Sreekumar, DL Bertsch, BL Dingus… - … Journal v. 464, p …, 1996 - adsabs.harvard.edu
EGRET Observations of the North Galactic Pole Region ADS Classic is now deprecated. It
will be completely retired in October 2019. This page will automatically redirect to the new …
will be completely retired in October 2019. This page will automatically redirect to the new …
Continuum radiation from active galactic nuclei
JN Bregman - The Astronomy and Astrophysics Review, 1990 - Springer
Active galactic nuclei (AGN) can be divided into two broad classes, where the emitted
continuum power is dominated either by thermal emission (radio-quiet AGN), or by …
continuum power is dominated either by thermal emission (radio-quiet AGN), or by …
Jet and accretion-disk emission untangled in 3C 273
P Grandi, GGC Palumbo - Science, 2004 - science.org
A long-term spectral variability study of 3C 273 on data obtained by BeppoSAX allows us to
decouple the beamed nonthermal (jet) and unbeamed thermal (accretion flow) radiation …
decouple the beamed nonthermal (jet) and unbeamed thermal (accretion flow) radiation …
The bright quasar 3C 273
TJL Courvoisier - The Astronomy and Astrophysics Review, 1998 - Springer
We review the observed properties of the bright quasar 3C 273 and discuss the implications
of these observations for the emission processes and in view of gaining a more global …
of these observations for the emission processes and in view of gaining a more global …
The behaviour of compact non-thermal sources with pair production
The behaviour of a compact source of hard non-thermal radiation may be strongly
influenced by electron–positron pairs created by photon–photon collisions. We investigate …
influenced by electron–positron pairs created by photon–photon collisions. We investigate …
Rapid infrared and optical variability in the bright quasar 3C273
TJL Courvoisier, EI Robson, A Blecha, P Bouchet… - Nature, 1988 - nature.com
The magnitude and timescale of variations in the luminosity of quasars provide crucial
constraints on the mechanism of emission and the physical size of the emitting region. We …
constraints on the mechanism of emission and the physical size of the emitting region. We …
[HTML][HTML] Five years monitoring of extragalactic radio sources. II-Quiescent spectra and the evolution of outbursts
E Valtaoja, S Haarala, H Lehto… - … (ISSN 0004-6361) …, 1988 - adsabs.harvard.edu
Five years monitoring of extragalactic radio sources. II - Quiescent spectra and ADS Classic is
now deprecated. It will be completely retired in October 2019. This page will automatically …
now deprecated. It will be completely retired in October 2019. This page will automatically …