Time-Dependent Modeling of Gamma-Ray Flares in Blazar Pks1510–089

Saito, Shinya; Stawarz, Ł.; Tanaka, Yasuyuki; Takahashi, Tadayuki; Sikora, Marek; Moderski, R.

doi:10.1088/0004-637x/809/2/171

Cited by 50 publications

(44 citation statements)

References 62 publications

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“…Such a scenario is consistent with the observed results from VLBI or VLBA (Bach et al 2005;Nesci et al 2005;Larionov et al 2013;Rani et al 2014Rani et al , 2015. In addition, twelve prominent sub-flares superimposed in the long-term trend may be related with shock/turbulence in jet (e.g., Marscher & Gear 1985;Marscher et al 2008Marscher et al , 2014Narayan & Piran 2012;Saito et al 2015;MAGIC Collaboration et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019

Xiong

Bai

Jiang

et al. 2020

ApJS

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We continuously monitored the blazar S5 0716+714 in the optical g, r and i bands from Nov. 10, 2017 to Jun. 06, 2019. The total number of observations is 201 nights including 26973 data points. This is a very large quasisimultaneous multicolor sample for the blazar. The average time spans and time resolutions are 3.4 hours and 2.9 minutes per night, respectively. During the period of observations, the target source in the r band brightens from 14 m .16 to 12 m .29 together with five prominent sub-flares, and then first becomes fainter to 14 m .76 and again brightens to 12 m .94 with seven prominent sub-flares. For the long-term variations, we find a strong flatter when brighter (FWB) trend at a low flux state and then a weak FWB trend at a higher flux state. A weak FWB trend at a low flux state and then a strong FWB trend at a higher flux state are also reported. Most of sub-flares show the strong FWB trends, except for two flares with a weak FWB trend. The particle acceleration and cooling mechanisms together with the superposition of different FWB-slopes from sub-flares are likely to explain the optical color behaviours. A scenario of bent jet is discussed.

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Section: Discussionmentioning

confidence: 99%

Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019

Xiong

Bai

Jiang

et al. 2020

ApJS

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“…These observations reveal a complex multi-wavelength behaviour [1,2] with changing correlation patterns between different wavelengths. This has lead to different interpretations, such as the requirement of at least two radiative emission components [3], or two spatially distinct emission zones [4].…”

Section: Introductionmentioning

confidence: 81%

The FSRQ PKS 1510-089: The Gamma-ray–Synchrotron Connection

Jankowsky¹,

Zacharias²,

Wagner³

et al. 2017

Proceedings of 7th International Fermi Symposium — PoS(IFS2017)

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The flat spectrum radio quasar (FSRQ) PKS 1510-089 (z=0.361) is known for its complex multiwavelength behaviour. Since 2015, it has been very active across the entire electromagnetic spectrum. This has lead to joint observation campaigns including Fermi-LAT, Cherenkov telescopes and several instrument covering the synchrotron branch. Observations resulted in a range of remarkable measurements, including rapid flares above 200 GeV with peak-fluxes exceeding the long-term average by up to a factor of 30 and unprecedented optical flares peaking in R-band at 13.6 magnitudes. The comparison of the various multi-wavelength light-curves also show that different events follow different spectral evolution within the gamma-ray band and display different relationships to the synchrotron emission. We discuss different selection effects as well as the effect of pair-absorption on flares originating at different distances from the core and conclude that absorption in the BLR is not the sole reason for the broad-band diversity. This diversity of multi-frequency correlations during different flares also reflects a diversity in physical properties of the emission regions and -possibly -even different dominating radiation mechanisms. This has implications for interpretations of orphan flares and searches for potential correlations to neutrino emission in AGN.

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“…Orienti et al (2013) found a γ-ray flare from PKS 1510-089 in late 2011 after the onset of a strong radio flare and located the γ-ray emitting site to be about 10 pc downstream of the jet base. On the other hand, Saito et al (2015) suggested that the γ-ray flares in 2011 occurred at the distance of 0.3-3 pc from the central engine with the seed photons provided by the BLR and DT, based on the model of internal shocks formed by colliding blobs of the jet plasma. Aleksić et al (2014) showed the HE and VHE γ-ray spectra in 2012 smoothly connected with each other.…”

Section: Introductionmentioning

confidence: 99%

Ejection of Double Knots from the Radio Core of PKS 1510–089 during the Strong Gamma-Ray Flares in 2015

Park

Lee

Hodgson

et al. 2019

ApJ

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PKS 1510-089 is a bright and active γ-ray source that showed strong and complex γ-ray flares in mid-2015 during which the Major Atmospheric Gamma Imaging Cherenkov telescopes detected variable very high energy (VHE; photon energies >100 GeV) emission. We present long-term multi-frequency radio, optical, and γ-ray light curves of PKS 1510-089 from 2013 to 2018, and results of an analysis of the jet kinematics and linear polarization using 43 GHz Very Long Baseline Array data observed between late 2015 and mid-2017. We find that a strong radio flare trails the γ-ray flares in 2015, showing an optically thick spectrum at the beginning and becoming optically thin over time. Two laterally separated knots of emission are observed to emerge from the radio core nearly simultaneously during the γ-ray flares. We detect an edge-brightened linear polarization near the core in the active jet state in 2016, similar to the quiescent jet state in 2008-2013. These observations indicate that the γ-ray flares may originate from compression of the knots by a standing shock in the core and the jet might consist of multiple complex layers showing time-dependent behavior, rather than of a simple structure of a fast jet spine and a slow jet sheath.

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Time-Dependent Modeling of Gamma-Ray Flares in Blazar Pks1510–089

Cited by 50 publications

References 62 publications

Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019

Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019

The FSRQ PKS 1510-089: The Gamma-ray–Synchrotron Connection

Ejection of Double Knots from the Radio Core of PKS 1510–089 during the Strong Gamma-Ray Flares in 2015

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