The Hour-timescale GeV Flares of PSR B1259–63 in 2017

Tam, Pak-Hin Thomas; He, Xinbo; Pal, Partha Sarathi; Cui, Yudong

doi:10.3847/1538-4357/aacf00

Cited by 22 publications

(17 citation statements)

References 35 publications

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“…The GeV emission started approximately tens of days after the periastron, and lasted more than one month. Multiple significant flares are seen in the detected GeV emission, and show very different properties on different time scales (Chang et al 2018;Johnson et al 2018;Tam et al 2018). Chang et al (2018) also reported a time delay of the main GeV flare by comparing the three previous periastron passages (2010, 2014 and 2017).…”

Section: Introductionmentioning

confidence: 85%

“…It has a large field of view (about 20% of the sky) and has been scanning the sky continuously since August 2008. Fermi -LAT observed PSR B1259-63 during its periastron period in 2010 (Abdo et al 2011;Tam et al 2011(Caliandro et al 2015, 2017 (Chang et al 2018;Johnson et al 2018;Tam et al 2018) and 2021 (Johnson et al 2021b,a,c;Chernyakova et al 2021).…”

Section: Observations and Data Analysismentioning

confidence: 99%

See 1 more Smart Citation

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

Chang,

Zhang,

Chen

et al. 2021

Preprint

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PSR B1259-63 is a γ-ray binary system, where the compact object is a pulsar. The system has an orbital period of 1236.7 days and shows peculiar γ-ray flares (in 100 MeV-300 GeV) after its periastron time. We analyzed the Fermi -LAT observation of PSR B1259-63 during its latest periastron passage, as well as its previous three periastrons. The bright GeV flares started about 60 days after the periastron epoch in 2021. This delay is larger than that around the 2017 periastron and much larger than earlier periastrons. The delay of the GeV flux peak time in each periastron passage is apparent in our results. We discussed the possible origin of this delay and made a prediction of the GeV flux peak time in next periastron passage, based on observation of the previous delays.

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Section: Introductionmentioning

confidence: 85%

Section: Observations and Data Analysismentioning

confidence: 99%

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

Chang,

Zhang,

Chen

et al. 2021

Preprint

View full text Add to dashboard Cite

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“…In the radio domain, PSR B1259−63 shows a pulsed component detected near the periastron [71] and a transient unpulsed component far from periastron [74]. In the γ-ray band the source was periodically detected by the Fermi-LAT [75][76][77] The INTEGRAL satellite observed this source at the 2004 periastron passage. The IBIS/ISGRI spectrum is well fitted with a power law spectrum of photon index of Γ = 1.3 ± 0.5 and an average luminosity of (8.1 ± 1.6)×>10 33 erg s −1 in the 20-80 keV energy band [83].…”

Section: Psr B1259−63mentioning

confidence: 98%

INTEGRAL View of TeV Sources: A Legacy for the CTA Project

et al. 2021

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Investigations that were carried out over the last two decades with novel and more sensitive instrumentation have dramatically improved our knowledge of the more violent physical processes taking place in galactic and extra-galactic Black-Holes, Neutron Stars, Supernova Remnants/Pulsar Wind Nebulae, and other regions of the Universe where relativistic acceleration processes are in place. In particular, simultaneous and/or combined observations with γ-ray satellites and ground based high-energy telescopes, have clarified the scenario of the mechanisms responsible for high energy photon emission by leptonic and hadronic accelerated particles in the presence of magnetic fields. Specifically, the European Space Agency INTEGRAL soft γ-ray observatory has detected more than 1000 sources in the soft γ-ray band, providing accurate positions, light curves and time resolved spectral data for them. Space observations with Fermi-LAT and observations that were carried out from the ground with H.E.S.S., MAGIC, VERITAS,and other telescopes sensitive in the GeV-TeV domain have, at the same time, provided evidence that a substantial fraction of the cosmic sources detected are emitting in the keV to TeV band via Synchrotron-Inverse Compton processes, in particular from stellar galactic BH systems as well as from distant black holes. In this work, employing a spatial cross correlation technique, we compare the INTEGRAL/IBIS and TeV all-sky data in search of secure or likely associations. Although this analysis is based on a subset of the INTEGRAL all-sky observations (1000 orbits), we find that there is a significant correlation: 39 objects (∼20% of the VHE γ-ray catalogue) show emission in both soft γ-ray and TeV wavebands. The full INTEGRAL database, now comprising almost 19 years of public data available, will represent an important legacy that will be useful for the Cherenkov Telescope Array (CTA) and other ground based large projects.

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“…It has a large field of view (about 20% of the sky) and has been scanning the sky continuously since August 2008. Fermi-LAT observed PSR B1259-63 during its periastron period in 2010 [16,17], 2014 [18], 2017 [11][12][13] and 2021 [14,[19][20][21].…”

Section: Observations and Data Analysismentioning

confidence: 99%

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

et al. 2021

View full text Add to dashboard Cite

PSR B1259-63 is a γ-ray binary system, where the compact object is a pulsar. The system has an orbital period of 1236.7 days and shows peculiar γ-ray flares (in 100 MeV–300 GeV) after its periastron time. We analyzed the Fermi-LAT observation of PSR B1259-63 during its latest periastron passage, as well as its previous three periastrons. The bright GeV flares started about 60 days after the periastron epoch in 2021. This delay is larger than that around the 2017 periastron and much larger than earlier periastrons. The delay of the GeV flux peak time in each periastron passage is apparent in our results. We discussed the possible origin of this delay and made a prediction of the GeV flux peak time in next periastron passage, based on observation of the previous delays.

show abstract

The Hour-timescale GeV Flares of PSR B1259–63 in 2017

Cited by 22 publications

References 35 publications

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

INTEGRAL View of TeV Sources: A Legacy for the CTA Project

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

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