Multiband Observations of the Quasar PKS 2326–502 during Active and Quiescent Gamma-Ray States in 2010–2012

Dutka, Michael S.; Carpenter, Bryce D.; Ojha, Roopesh; Finke, Justin D.; D’Ammando, Filippo; Kadler, Matthias; Edwards, Philip G.; Stevens, Jamie; Torresi, Eleonora; Grandi, Paola; Nesci, Roberto; Krauß, Felicia; Müller, Cornelia; Wilms, Joern; Gehrels, Neil

doi:10.3847/1538-4357/835/2/182

Title: Multiband Observations of the Quasar PKS 2326–502 during Active and Quiescent Gamma-Ray States in 2010–2012

Journal Article · Mon Jan 30 00:00:00 EST 2017 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/1538-4357/835/2/182· OSTI ID:1355740

Dutka, Michael S.;

; Ojha, Roopesh; Finke, Justin D.;

;

; Edwards, Philip G.; Stevens, Jamie; Torresi, Eleonora; Grandi, Paola; Nesci, Roberto;

; Müller, Cornelia; Wilms, Joern; Gehrels, Neil

We present that quasi-simultaneous observations of the Flat Spectrum Radio Quasar PKS 2326-502 were carried out in the γ-ray, X-ray, UV, optical, near-infrared, and radio bands. Using these observations, we are able to characterize the spectral energy distribution (SED) of the source during two flaring and one quiescent γ-ray states. These data were used to constrain one-zone leptonic models of the SEDs of each flare and investigate the physical conditions giving rise to them. While modeling one flare required only changes in the electron spectrum compared to the quiescent state, modeling the other flare required changes in both the electron spectrum and the size of the emitting region. These results are consistent with an emerging pattern of two broad classes of flaring states seen in blazars. Type 1 flares are explained by changes solely in the electron distribution, whereas type 2 flares require a change in an additional parameter. Finally, this suggests that different flares, even in the same source, may result from different physical conditions or different regions in the jet.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Fermi LAT Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1355740

Journal Information:: The Astrophysical Journal (Online), Vol. 835, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 2 works

Citation information provided by
Web of Science

References (41)

THE SPECTRAL ENERGY DISTRIBUTION OF FERMI BRIGHT BLAZARS Abdo, A. A.; Ackermann, M.; Agudo, I. The Astrophysical Journal, Vol. 716, Issue 1 https://doi.org/10.1088/0004-637X/716/1/30	journal	May 2010
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG Abdo, A. A.; Ackermann, M.; Ajello, M. The Astrophysical Journal Supplement Series, Vol. 188, Issue 2 https://doi.org/10.1088/0067-0049/188/2/405	journal	May 2010
FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG Acero, F.; Ackermann, M.; Ajello, M. The Astrophysical Journal Supplement Series, Vol. 218, Issue 2 https://doi.org/10.1088/0067-0049/218/2/23	journal	June 2015
Multifrequency Studies of the Peculiar Quasar 4c +21.35 During the 2010 Flaring Activity Ackermann, M.; Ajello, M.; Allafort, A. The Astrophysical Journal, Vol. 786, Issue 2 https://doi.org/10.1088/0004-637X/786/2/157	journal	April 2014
THE THIRD CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE Ackermann, M.; Ajello, M.; Atwood, W. B. The Astrophysical Journal, Vol. 810, Issue 1 https://doi.org/10.1088/0004-637X/810/1/14	journal	August 2015
NUSTAR, SWIFT , AND GROND OBSERVATIONS OF THE FLARING MEV BLAZAR PMN J0641−0320 Ajello, M.; Ghisellini, G.; Paliya, V. S. The Astrophysical Journal, Vol. 826, Issue 1 https://doi.org/10.3847/0004-637X/826/1/76	journal	July 2016
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION Atwood, W. B.; Abdo, A. A.; Ackermann, M. The Astrophysical Journal, Vol. 697, Issue 2 https://doi.org/10.1088/0004-637X/697/2/1071	journal	May 2009
Radiation from relativistic blast waves in quasars and active galactic nuclei Blandford, R. D.; McKee, C. F. Monthly Notices of the Royal Astronomical Society, Vol. 180, Issue 3 https://doi.org/10.1093/mnras/180.3.343	journal	October 1977
Smarts Optical and Infrared Monitoring of 12 Gamma-Ray Bright Blazars Bonning, Erin; Megan Urry, C.; Bailyn, Charles The Astrophysical Journal, Vol. 756, Issue 1 https://doi.org/10.1088/0004-637X/756/1/13	journal	August 2012
Modeling the emission processes in blazars Böttcher, Markus Astrophysics and Space Science, Vol. 309, Issue 1-4 https://doi.org/10.1007/s10509-007-9404-0	journal	April 2007
LEPTONIC AND HADRONIC MODELING OF FERMI -DETECTED BLAZARS Böttcher, M.; Reimer, A.; Sweeney, K. The Astrophysical Journal, Vol. 768, Issue 1 https://doi.org/10.1088/0004-637X/768/1/54	journal	April 2013
Parameter estimation in astronomy through application of the likelihood ratio Cash, W. The Astrophysical Journal, Vol. 228 https://doi.org/10.1086/156922	journal	March 1979
Long-term monitoring of PKS 0537−441 with Fermi–LAT and multiwavelength observations D’Ammando, F.; Antolini, E.; Tosti, G. Monthly Notices of the Royal Astronomical Society, Vol. 431, Issue 3 https://doi.org/10.1093/mnras/stt344	journal	March 2013
Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of flat Spectrum Radio Quasars Dermer, Charles D.; Finke, Justin D.; Krug, Hannah The Astrophysical Journal, Vol. 692, Issue 1 https://doi.org/10.1088/0004-637X/692/1/32	journal	February 2009
Multi-Wavelength Observations of pks 2142–75 During Active and Quiescent Gamma-Ray States Dutka, Michael S.; Ojha, Roopesh; Pottschmidt, Katja The Astrophysical Journal, Vol. 779, Issue 2 https://doi.org/10.1088/0004-637X/779/2/174	journal	December 2013
Infrared standard stars Elias, J. H.; Frogel, J. A.; Matthews, K. The Astronomical Journal, Vol. 87 https://doi.org/10.1086/113185	journal	July 1982
Compton Dominance and the Blazar Sequence Finke, Justin D. The Astrophysical Journal, Vol. 763, Issue 2 https://doi.org/10.1088/0004-637X/763/2/134	journal	January 2013
Synchrotron Self‐Compton Analysis of TeV X‐Ray‐Selected BL Lacertae Objects Finke, Justin D.; Dermer, Charles D.; Böttcher, Markus The Astrophysical Journal, Vol. 686, Issue 1 https://doi.org/10.1086/590900	journal	October 2008
Correcting for the Effects of Interstellar Extinction Fitzpatrick, Edward L. Publications of the Astronomical Society of the Pacific, Vol. 111, Issue 755 https://doi.org/10.1086/316293	journal	January 1999
Photometric studies of composite stellar systems. I - CO and JHK observations of E and S0 galaxies Frogel, J. A.; Persson, S. E.; Matthews, K. The Astrophysical Journal, Vol. 220 https://doi.org/10.1086/155883	journal	February 1978
The Swift Gamma‐Ray Burst Mission Gehrels, N.; Chincarini, G.; Giommi, P. The Astrophysical Journal, Vol. 611, Issue 2 https://doi.org/10.1086/422091	journal	August 2004
The blazar sequence: a new perspective Ghisellini, G.; Tavecchio, F. Monthly Notices of the Royal Astronomical Society, Vol. 387, Issue 4 https://doi.org/10.1111/j.1365-2966.2008.13360.x	journal	July 2008
Redshifts of southern radio sources. VI Jauncey, D. L.; Batty, M. J.; Wright, A. E. The Astrophysical Journal, Vol. 286 https://doi.org/10.1086/162624	journal	November 1984
Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array Jorstad, Svetlana G.; Marscher, Alan P.; Lister, Matthew L. The Astronomical Journal, Vol. 130, Issue 4 https://doi.org/10.1086/444593	journal	October 2005
Multiepoch Very Long Baseline Array Observations of EGRET‐detected Quasars and BL Lacertae Objects: Connection between Superluminal Ejections and Gamma‐Ray Flares in Blazars Jorstad, Svetlana G.; Marscher, Alan P.; Mattox, John R. The Astrophysical Journal, Vol. 556, Issue 2 https://doi.org/10.1086/321605	journal	August 2001
The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections Kalberla, P. M. W.; Burton, W. B.; Hartmann, Dap Astronomy & Astrophysics, Vol. 440, Issue 2 https://doi.org/10.1051/0004-6361:20041864	journal	September 2005
An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi -LAT data Lott, B.; Escande, L.; Larsson, S. Astronomy & Astrophysics, Vol. 544 https://doi.org/10.1051/0004-6361/201218873	journal	July 2012
The Jet‐Disk Connection and Blazar Unification Maraschi, Laura; Tavecchio, Fabrizio The Astrophysical Journal, Vol. 593, Issue 2 https://doi.org/10.1086/342118	journal	August 2003
Turbulent, Extreme Multi-Zone Model for Simulating flux and Polarization Variability in Blazars Marscher, Alan P. The Astrophysical Journal, Vol. 780, Issue 1 https://doi.org/10.1088/0004-637X/780/1/87	journal	December 2013
AGN Dusty Tori. I. Handling of Clumpy Media Nenkova, Maia; Sirocky, Matthew M.; Ivezić, Željko The Astrophysical Journal, Vol. 685, Issue 1 https://doi.org/10.1086/590482	journal	September 2008
FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG Nolan, P. L.; Abdo, A. A.; Ackermann, M. The Astrophysical Journal Supplement Series, Vol. 199, Issue 2 https://doi.org/10.1088/0067-0049/199/2/31	journal	March 2012
TANAMI: tracking active galactic nuclei with austral milliarcsecond interferometry: I. First-epoch 8.4 GHz images Ojha, R.; Kadler, M.; Böck, M. Astronomy and Astrophysics, Vol. 519 https://doi.org/10.1051/0004-6361/200912724	journal	September 2010
Broadband Observations of high Redshift Blazars Paliya, Vaidehi S.; Parker, M. L.; Fabian, A. C. The Astrophysical Journal, Vol. 825, Issue 1 https://doi.org/10.3847/0004-637X/825/1/74	journal	June 2016
Properties of Blazar jets Defined by an Economy of Power Petropoulou, Maria; Dermer, Charles D. The Astrophysical Journal, Vol. 825, Issue 1 https://doi.org/10.3847/2041-8205/825/1/L11	journal	June 2016
Extremes of the jet–accretion power relation of blazars, as explored by NuSTAR Sbarrato, T.; Ghisellini, G.; Tagliaferri, G. Monthly Notices of the Royal Astronomical Society, Vol. 462, Issue 2 https://doi.org/10.1093/mnras/stw1730	journal	July 2016
Measuring Reddening with Sloan Digital sky Survey Stellar Spectra and Recalibrating sfd Schlafly, Edward F.; Finkbeiner, Douglas P. The Astrophysical Journal, Vol. 737, Issue 2 https://doi.org/10.1088/0004-637X/737/2/103	journal	August 2011
Constraining Emission Models of Luminous Blazar Sources Sikora, Marek; Stawarz, Łukasz; Moderski, Rafał The Astrophysical Journal, Vol. 704, Issue 1 https://doi.org/10.1088/0004-637X/704/1/38	journal	September 2009
Efficient generation of jets from magnetically arrested accretion on a rapidly spinning black hole: Jets from magnetically arrested BH accretion Tchekhovskoy, Alexander; Narayan, Ramesh; McKinney, Jonathan C. Monthly Notices of the Royal Astronomical Society: Letters, Vol. 418, Issue 1 https://doi.org/10.1111/j.1745-3933.2011.01147.x	journal	November 2011
Unified Schemes for Radio-Loud Active Galactic Nuclei Urry, C. Megan; Padovani, Paolo Publications of the Astronomical Society of the Pacific, Vol. 107 https://doi.org/10.1086/133630	journal	June 1995
The Wide-Field Infrared Survey Explorer (Wise): Mission Description and Initial On-Orbit Performance Wright, Edward L.; Eisenhardt, Peter R. M.; Mainzer, Amy K. The Astronomical Journal, Vol. 140, Issue 6 https://doi.org/10.1088/0004-6256/140/6/1868	journal	November 2010
Hadronic models of blazars require a change of the accretion paradigm Zdziarski, Andrzej A.; Böttcher, Markus Monthly Notices of the Royal Astronomical Society: Letters, Vol. 450, Issue 1 https://doi.org/10.1093/mnrasl/slv039	journal	April 2015

Cited By (1)

The large gamma-ray flare of the flat-spectrum radio quasar PKS 0346−27 Angioni, R.; Nesci, R.; Finke, J. D. Astronomy & Astrophysics, Vol. 627 https://doi.org/10.1051/0004-6361/201935461	journal	July 2019

Similar Records

Multiband Observations of the Quasar PKS 2326–502 during Active and Quiescent Gamma-Ray States in 2010–2012

Journal Article · Wed Feb 01 00:00:00 EST 2017 · Astrophysical Journal · OSTI ID:1355740

Dutka, Michael S.; Carpenter, Bryce D.; Gehrels, Neil; +12 more

MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

Journal Article · Wed Sep 17 00:00:00 EDT 2014 · Astronomy and Astrophysics · OSTI ID:1355740

Aleksić, J.; Ansoldi, S.; Antonelli, L. A.; +216 more

Simultaneous Millimeter-wave, Gamma-Ray, and Optical Monitoring of the Blazar PKS 2326-502 during a Flaring State

Journal Article · Fri Mar 10 00:00:00 EST 2023 · The Astrophysical Journal. Letters · OSTI ID:1355740

Hood II, J. C.; Simpson, A.; McDaniel, A.; +66 more

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
galaxies: active
gamma rays: galaxies
quasars: individual (PKS 2326–502)
radio continuum: galaxies
ultraviolet: galaxies
X-rays: individual (PKS 2326–502)

Title: Multiband Observations of the Quasar PKS 2326–502 during Active and Quiescent Gamma-Ray States in 2010–2012

Citation Formats

References (41)

Cited By (1)

Similar Records

Related Subjects