The most powerful flaring activity from the NLSyl PMN J0948+0022

F. D'Ammando; M. Orienti; J. Finke; C. M. Raiteri; T. Hovatta; J. Larsson; W. Max-Moerbeck; J. Perkins; A. C. S. Readhead; J. L. Richards; M. Beilicke; W. Benbow; K. Berger; R. Bird; V. Bugaev; J. V. Cardenzana; M. Cerruti; X. Chen; L. Ciupik; H. J. Dickinson; J. D. Eisch; M. Errando; A. Falcone; J. P. Finley; H. Fleischhack; P. Fortin; L. Fortson; A. Furniss; L. Gerard; G. H. Gillanders; S. T. Griffiths; J. Grube; G. Gyuk; N. Hakansson; J. Holder; T. B. Humensky; P. Kar; M. Kertzman; Y. Khassen; D. Kieda; F. Krennrich; S. Kumar; M. J. Lang; G. Maier; A. McCann; K. Meagher; P. Moriarty; R. Mukherjee; D. Nieto; A. O'Faolain de Bhroithe; R. A. Ong; A. N. Otte; M. Pohl; A. Popkow; H. Prokoph; E. Pueschel; J. Quinn; K. Ragan; P. T. Reynolds; G. T. Richards; E. Roache; J. Rousselle; M. Santander; G. H. Sembroski; A. W. Smith; D. Staszak; I. Telezhinsky; J. V. Tucci; J. Tyler; A. Varlotta; V. V. Vassiliev; S. P. Wakely; A. Weinstein; R. Welsing; D. A. Williams; B. Zitzer; VERITAS Collaboration

doi:10.1093/mnras/stu2251

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The most powerful flaring activity from the NLSyl PMN J0948+0022

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The most powerful flaring activity from the NLSyl PMN J0948+0022

F. D'Ammando, M. Orienti, J. Finke, C. M. Raiteri, T. Hovatta, J. Larsson, W. Max-Moerbeck, J. Perkins, A. C. S. Readhead, J. L. Richards, …

Monthly notices of the Royal Astronomical Society, v 446(3), pp 2456-2467

21 Jan 2015

DOI: https://doi.org/10.1093/mnras/stu2251

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Abstract

Astronomy & Astrophysics

Physical Sciences

Science & Technology

We report on multifrequency observations performed during 2012 December-2013 August of the first narrow-line Seyfert 1 galaxy detected in gamma-rays, PMN J0948+0022 (z = 0.5846). A y -ray flare was observed by the Large Area Telescope on board Fermi during 2012 December-2013 January, reaching a daily peak flux in the 0.1-100 GeV energy range of (155 31) x 10 8 ph cm(-2) S-1 on 2013 January 1, corresponding to an apparent isotropic luminosity of similar to 1.5 x 1048 erg s(-1). The y -ray flaring period triggered Swift and Very Energetic Radiation Imaging Telescope Array System (VERITAS) observations in addition to radio and optical monitoring by Owens Valley Radio Observatory, Monitoring Of Jets in Active galactic nuclei with VLBA Experiments, and Catalina Real-time Transient Survey. A strong flare was observed in optical, UV, and X-rays on 2012 December 30, quasi-simultaneously to the y -ray flare, reaching a record flux for this source from optical to y gamma-rays. VERITAS observations at very high energy (E > 100 GeV) during 2013 January 6-17 resulted in an upper limit of F>0.2 Trev < 4.0 x 10(-12) ph cm(-2) s(-1). We compared the spectral energy distribution (SED) of the flaring state in 2013 January with that of an intermediate state observed in 2011. The two SEDs, modelled as synchrotron emission and an external Compton scattering of seed photons from a dust torus, can be modelled by changing both the electron distribution parameters and the magnetic field.

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Title: The most powerful flaring activity from the NLSyl PMN J0948+0022
Creators: F. D'Ammando - National Institute for Astrophysics
M. Orienti - National Institute for Astrophysics
J. Finke - United States Naval Research Laboratory
C. M. Raiteri - National Institute for Astrophysics
T. Hovatta - California Institute of Technology
J. Larsson - KTH, Dept Phys, SE-10691 Stockholm, Sweden
W. Max-Moerbeck - National Radio Astronomy Observatory
J. Perkins - Goddard Space Flight Center
A. C. S. Readhead - California Institute of Technology
J. L. Richards - Purdue University West Lafayette
M. Beilicke - Washington University in St. Louis
W. Benbow - Harvard University
K. Berger - University of Delaware
R. Bird - University College Dublin
V. Bugaev - Washington University in St. Louis
J. V. Cardenzana - Iowa State University
M. Cerruti - Harvard University
X. Chen - University of Potsdam
L. Ciupik - Adler Planetarium
H. J. Dickinson - Iowa State University
J. D. Eisch - Iowa State University
M. Errando - Columbia University
A. Falcone - Pennsylvania State University
J. P. Finley - Purdue University West Lafayette
H. Fleischhack - DESY, D-15738 Zeuthen, Germany
P. Fortin - Harvard University
L. Fortson - University of Minnesota
A. Furniss - Santa Cruz Institute for Particle Physics
L. Gerard - DESY, D-15738 Zeuthen, Germany
G. H. Gillanders - National University of Ireland, Galway
S. T. Griffiths - University of Iowa
J. Grube - Adler Planetarium
G. Gyuk - Adler Planetarium
N. Hakansson - University of Potsdam
J. Holder - University of Delaware
T. B. Humensky - Columbia University
P. Kar - University of Utah
M. Kertzman - DePauw University
Y. Khassen - University College Dublin
D. Kieda - University of Utah
F. Krennrich - Iowa State University
S. Kumar - University of Delaware
M. J. Lang - National University of Ireland, Galway
G. Maier - DESY, D-15738 Zeuthen, Germany
A. McCann - University of Chicago
K. Meagher - Georgia Institute of Technology
P. Moriarty - National University of Ireland, Galway
R. Mukherjee - Columbia University
D. Nieto - Columbia University
A. O'Faolain de Bhroithe - DESY, D-15738 Zeuthen, Germany
R. A. Ong - University of California, Los Angeles
A. N. Otte - Georgia Institute of Technology
M. Pohl - University of Potsdam
A. Popkow - University of California, Los Angeles
H. Prokoph - DESY, D-15738 Zeuthen, Germany
E. Pueschel - University College Dublin
J. Quinn - University College Dublin
K. Ragan - McGill University
P. T. Reynolds - Cork Institute of Technology
G. T. Richards - Georgia Institute of Technology
E. Roache - Harvard University
J. Rousselle - University of California, Los Angeles
M. Santander - Columbia University
G. H. Sembroski - Purdue University West Lafayette
A. W. Smith - University of Utah
D. Staszak - McGill University
I. Telezhinsky - University of Potsdam
J. V. Tucci - Purdue University West Lafayette
J. Tyler - McGill University
A. Varlotta - Purdue University West Lafayette
V. V. Vassiliev - University of California, Los Angeles
S. P. Wakely - University of Chicago
A. Weinstein - Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
R. Welsing - DESY, D-15738 Zeuthen, Germany
D. A. Williams - Santa Cruz Institute for Particle Physics
B. Zitzer - Argonne National Laboratory
VERITAS Collaboration
Publication Details: Monthly notices of the Royal Astronomical Society, v 446(3), pp 2456-2467
Publisher: Oxford Univ Press
Number of pages: 12
Grant note: US Department of Energy Office of Science; United States Department of Energy (DOE) NSERC in Canada; Natural Sciences and Engineering Research Council of Canada (NSERC) NNX08AW31G; NNX11A043G / NASA; National Aeronautics & Space Administration (NASA) SFI 10/RFP/AST2748 / Science Foundation Ireland; European Commission Science and Technology Facilities Council in the UK; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) NNX08AW56G; NNX09AU10G; NNX12AO93G / Fermi Guest Investigator grants 1207595 / Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) Smithsonian Institution AST-0808050; AST-1109911 / NSF; National Science Foundation (NSF) AST-0909182 / US National Science Foundation; National Science Foundation (NSF) 1068179 / Division Of Physics; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS)
Resource Type: Journal article
Language: English
Academic Unit: Physics
Web of Science ID: WOS:000350272300020
Scopus ID: 2-s2.0-84984998020
Other Identifier: 991019201501904721

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Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Astronomy & Astrophysics

The most powerful flaring activity from the NLSyl PMN J0948+0022

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