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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/43583
Title: CONTEMPORANEOUS BROADBAND OBSERVATIONS of THREE HIGH-REDSHIFT BL LAC OBJECTS
Authors: M. Ackermann
M. Ajello
H. An
L. Baldini
G. Barbiellini
D. Bastieri
R. Bellazzini
E. Bissaldi
R. D. Blandford
R. Bonino
J. Bregeon
R. J. Britto
P. Bruel
R. Buehler
G. A. Caliandro
R. A. Cameron
M. Caragiulo
P. A. Caraveo
E. Cavazzuti
C. Cecchi
E. Charles
A. Chekhtman
G. Chiaro
S. Ciprini
J. Cohen-Tanugi
F. Costanza
S. Cutini
F. D'Ammando
A. De Angelis
F. De Palma
R. Desiante
M. Di Mauro
L. Di Venere
A. Dominguez
P. S. Drell
C. Favuzzi
S. J. Fegan
E. C. Ferrara
J. Finke
P. Fusco
F. Gargano
D. Gasparrini
N. Giglietto
F. Giordano
M. Giroletti
D. Green
I. A. Grenier
S. Guiriec
D. Horan
G. Jóhannesson
M. Katsuragawa
M. Kuss
S. Larsson
L. Latronico
J. Li
L. Li
F. Longo
F. Loparco
M. N. Lovellette
P. Lubrano
J. Magill
S. Maldera
A. Manfreda
M. Mayer
M. N. Mazziotta
P. F. Michelson
N. Mirabal
W. Mitthumsiri
T. Mizuno
M. E. Monzani
A. Morselli
I. V. Moskalenko
M. Negro
E. Nuss
Deutsche Elektronen-Synchrotron
Clemson University
Kavli Institute for Particle Astrophysics and Cosmology
Università di Pisa
Istituto Nazionale di Fisica Nucleare, Roma
Universita degli Studi di Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
Università degli Studi di Padova
Istituto Nazionale Di Fisica Nucleare, Sezione di Pisa
Università degli Studi di Torino
Laboratoire Univers et Particules de Montpellier
University of Johannesburg
Laboratoire Leprince-Ringuet
Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
Università degli Studi di Bari
INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
Agenzia Spaziale Italiana
Universita degli Studi di Perugia
George Mason University, Fairfax Campus
Osservatorio Astronomico di Roma
Istituto Di Radioastronomia, Bologna
Alma Mater Studiorum Università di Bologna
Universita degli Studi di Udine
Università degli Studi di Napoli Federico II
NASA Goddard Space Flight Center
Naval Research Laboratory
University of Maryland
Institut de Recherche sur les Lois Fondamentales de l'Univers
University Science Institute Reykjavik
JAXA Institute of Space and Astronautical Science
The Royal Institute of Technology (KTH)
Oskar Klein Centre for Cosmoparticle Physics
Universitat Autònoma de Barcelona
Mahidol University
Hiroshima University
Max Planck Institut fur Physik (Werner-Heisenberg-Institut)
Medizinische Universitat Innsbruck
Max Planck Institut fur extraterrestrische Physik
NYCB Realtime Computing Inc.
Jet Propulsion Laboratory, California Institute of Technology
Institucio Catalana de Recerca I Estudis Avancats
Keywords: Earth and Planetary Sciences
Issue Date: 20-Mar-2016
Citation: Astrophysical Journal. Vol.820, No.1 (2016)
Abstract: © 2016. The American Astronomical Society. All rights reserved. We have collected broadband spectral energy distributions (SEDs) of three BL Lac objects 3FGL J0022.1-1855 (z = 0.689), 3FGL J0630.9-2406 (z≳ 1.239), and 3FGL J0811.2-7529 (z = 0.774), detected by Fermi with relatively flat gigaelectronvolt spectra. By observing simultaneously in the near-infrared to hard X-ray band, we can well characterize the high end of the synchrotron component of the SED. Thus, fitting the SEDs to synchro-Compton models of the dominant emission from the relativistic jet, we can constrain the underlying particle properties and predict the shape of the gigaelectronvolt Compton component. Standard extragalactic background light (EBL) models explain the high-energy absorption well, with poorer fits for high-ultraviolet models. The fits show clear evidence for EBL absorption in the Fermi spectrum of our highest-redshift source 3FGL J0630.9-2406. While synchrotron self-Compton models adequately describe the SEDs, the situation may be complicated by possible external Compton components. For 3FGL J0811.2-7529, we also discover a nearby serendipitous source in the X-ray data, which is almost certainly another lower synchrotron peak frequency (vpksy) BL Lac, that may contribute flux in the Fermi band. Since our sources are unusual high-luminosity, moderate vpksy BL Lacs, we compare these quantities and the Compton dominance, the ratio of peak inverse Compton to peak synchrotron luminosities (LpkIC/Lpksy), with those of the full Fermi BL Lac population.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84961657918&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/43583
ISSN: 15384357
0004637X
Appears in Collections:Scopus 2016-2017

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