scholarly journals Complex Spectral Variability from Intensive Multiwavelength Monitoring of Markarian 421 in 1998

2000 ◽  
Vol 542 (2) ◽  
pp. L105-L109 ◽  
Author(s):  
T. Takahashi ◽  
J. Kataoka ◽  
G. Madejski ◽  
J. Mattox ◽  
C. M. Urry ◽  
...  
Keyword(s):  
Spectral Variability ◽  
Markarian 421

Discovery of Spectral Variability of Markarian 421 at T[CLC]e[/CLC]V Energies

2002 ◽  
Vol 575 (1) ◽  
pp. L9-L13 ◽  
Author(s):  
F. Krennrich ◽  
I. H. Bond ◽  
S. M. Bradbury ◽  
J. H. Buckley ◽  
D. A. Carter-Lewis ◽  
...  
Keyword(s):  
Spectral Variability ◽  
Markarian 421

Complex X‐Ray Spectral Variability in Markarian 421 Observed withXMM‐Newton

2002 ◽  
Vol 574 (2) ◽  
pp. 634-642 ◽  
Author(s):  
S. Sembay ◽  
R. Edelson ◽  
A. Markowitz ◽  
R. G. Griffiths ◽  
M. J. L. Turner
Keyword(s):  
Spectral Variability ◽  
Markarian 421 ◽  
X Ray

scholarly journals Rapid spectral variability of a giant flare from a magnetar in NGC 253

Nature ◽  
2021 ◽  
Vol 589 (7841) ◽  
pp. 207-210 ◽  
Author(s):  
O. J. Roberts ◽  
P. Veres ◽  
M. G. Baring ◽  
M. S. Briggs ◽  
C. Kouveliotou ◽  
...  
Keyword(s):  
Spectral Variability ◽  
Giant Flare

Hypersharpening by an NMF-Unmixing-Based Method Addressing Spectral Variability

2021 ◽  
pp. 1-5
Author(s):  
Salah Eddine Brezini ◽  
Moussa Sofiane Karoui ◽  
Fatima Zohra Benhalouche ◽  
Yannick Deville ◽  
Abdelaziz Ouamri
Keyword(s):  
Spectral Variability

Linear Mixing Model with Scaled Bundle Dictionary for Hyperspectral Unmixing with Spectral Variability

2021 ◽  
pp. 108214
Author(s):  
Saeideh Ghanbari Azar ◽  
Saeed Meshgini ◽  
Soosan Beheshti ◽  
Tohid Yousefi Rezaii
Keyword(s):  
Mixing Model ◽  
Spectral Variability ◽  
Hyperspectral Unmixing ◽  
Linear Mixing Model

Spectral variability of P Cyg

Astrophysics ◽  
1994 ◽  
Vol 36 (2) ◽  
pp. 119-121
Author(s):  
G. L. Israelyan ◽  
A. G. Nikogosyan
Keyword(s):  
Spectral Variability

LOCATING THE BLAZAR EMISSION SITE WITH FERMI VARIABILITY

2012 ◽  
Vol 08 ◽  
pp. 37-42
Author(s):  
MARKOS GEORGANOPOULOS ◽  
AMANDA DOTSON ◽  
DEMOSTHENES KAZANAS ◽  
ERIC PERLMAN
Keyword(s):  
Energy Dissipation ◽  
Broad Line ◽  
Jet Formation ◽  
Spectral Variability ◽  
Ongoing Debate ◽  
Broad Line Region ◽  
Photon Field ◽  
First Case ◽  
Line Region

This work presents a method for settling the following ongoing debate: is the GeV emission of powerful blazars produced inside the sub-pc size broad line region (BLR) or further out at scales of ~ 10 pc where the IR photon field of the dusty molecular torus dominates over that the UV field of the BLR? In the first case the GeV emission is most probably external Compton (EC) scattering of the ~ 10 eV BLR photons21, while in the second the seed photons for the EC GeV emission are the ~ 0.1 eV photons of the dust9 in the molecular torus8. The issue of the energy dissipation location is connected to the jet formation and collimation process25 and, as we argue here, can be resolved with Fermi spectral variability observations.

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