Multiwavelength observation of MAXI J1820+070 with MAGIC, VERITAS and H.E.S.S.

Hoang, J.; Molina, Edgar; López, M.; Ribó, M.; Blanch, O.; Cortina, J.; Maier, G.; Park, Nahee; Naurois, M. de; Wilhelmi, E. de Oña; Ernenwein, Jean-Pierre; Malyshev, D.; Mitchell, Alison; Ohm, S.; Zanin, R.

doi:10.22323/1.358.0696

Cited by 2 publications

(3 citation statements)

References 19 publications

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“…predicted spectrum in Fig. 11 to the upper limits set by Fermi/ LAT and the Cherenkov telescopes MAGIC, VERITAS, and HESS (Hoang et al 2019 ). We see that the predicted emission exceeds the upper limits of HESS and marginally those of VERITAS, but it is worth mentioning that these upper limits are derived after 26.9 and 12.2 h, respectively (Hoang et al 2019 ).…”

Section: γ -Rays From Bhxbsmentioning

confidence: 65%

“…11 to the upper limits set by Fermi/ LAT and the Cherenkov telescopes MAGIC, VERITAS, and HESS (Hoang et al 2019 ). We see that the predicted emission exceeds the upper limits of HESS and marginally those of VERITAS, but it is worth mentioning that these upper limits are derived after 26.9 and 12.2 h, respectively (Hoang et al 2019 ). We are unable to capture the timing signature of the TeV emission with the current version of our model, but we moreo v er do not know yet whether the high-energy emission of these sources is persistent for up to 20-30 h (Bodaghee et al 2013 ).…”

Section: γ -Rays From Bhxbsmentioning

confidence: 97%

“…The spectral energy distribution based on the lepto-hadronic scenario with p p = 1.7 for the 2018 outburst of MAXI J1820 + 070. We compare the total emitted spectrum to the upper limits of Fermi /LAT (F), MAGIC (M), VERITAS (V), and HESS (H) from Hoang et al ( 2019 ), and the predicted 50-h sensitivity of the North and South site of CTA (from www.ct a-observat or y.or g ). The rest of the components are the same as in Fig.…”

Section: γ -Rays From Bhxbsmentioning

confidence: 99%

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The prototype X-ray binary GX 339–4: using TeV γ-rays to assess LMXBs as Galactic cosmic ray accelerators

Kantzas

Markoff

Lucchini

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Since the discovery of cosmic rays (CRs) over a century ago, their origin remains an open question. Galactic CRs with energy up to the knee (1015 eV) are considered to originate from supernova remnants, but this scenario has recently been questioned due to lack of TeV γ-ray counterparts in many cases. Extragalactic CRs on the other hand, are thought to be associated with accelerated particles in the relativistic jets launched by supermassive accreting black holes at the center of galaxies. Scaled down versions of such jets have been detected in X-ray binaries hosting a stellar black hole (BHXBs). In this work, we investigate the possibility that the smaller-scale jets in transient outbursts of low-mass BHXBs could be sources of Galactic CRs. To better test this scenario, we model the entire electromagnetic spectrum of such sources focusing on the potential TeV regime, using the ’canonical’ low-mass BHXB GX 339–4as a benchmark. Taking into account both the leptonic radiative processes and the γ-rays produced via neutral pion decay from inelastic hadronic interactions, we predict the GeV and TeV γ-ray spectrum of GX 339–4 using lower-frequency emission as constraints. Based on this test-case of GX 339–4 we investigate whether other, nearby low-mass BHXBs could be detected by the next-generation very-high-energy γ-ray facility the Cherenkov Telescope Array, which would establish them as additional and numerous potential sources of CRs in the Galaxy.

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Section: γ -Rays From Bhxbsmentioning

confidence: 65%

Section: γ -Rays From Bhxbsmentioning

confidence: 97%

Section: γ -Rays From Bhxbsmentioning

confidence: 99%

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The prototype X-ray binary GX 339–4: using TeV γ-rays to assess LMXBs as Galactic cosmic ray accelerators

Kantzas

Markoff

Lucchini

et al. 2022

Monthly Notices of the Royal Astronomical Society

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INTEGRAL study of MAXI J1535−571, MAXI J1820+070, and MAXI J1348 − 630 outbursts

Cangemi

Rodríguez

Belloni

et al. 2023

A&A

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In black hole X-ray binaries, a nonthermal high-energy component is sometimes detected at energies above 200 keV. The origin of this high-energy component is debated and distinct spectral modelizations can lead to different interpretations. High-energy polarimetry measurements with the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) enable new diagnostics on the physics responsible for the MeV spectral component in black hole X-ray binaries. In this work, we aim to investigate the high-energy behavior of three bright sources discovered by the Monitor of All-sky X-ray Image: MAXI J1535−571, MAXI J1820+070, and MAXI J1348−630. We took advantage of their brightness to investigate their soft γ-ray (0.1-2 MeV) properties with INTEGRAL. We used both spectral and polarimetric approaches to probe their high-energy emission with the aim of bringing new constraints on the MeV emission in black hole X-ray binaries. We first studied the spectral characteristics of the sources in the 3-2000 keV range using JEM-X, IBIS, and SPI, with a semi-phenomenological description of the data. We then used IBIS as a Compton telescope in order to evaluate the polarization properties of the sources above 300 keV. A high-energy component was detected during the hardintermediate state and soft-intermediate state of MAXI J1535−571, the low-hard state of MAXI J1820+070, and the low-hard state of MAXI J1348−630. The components detected in MAXI J1820+070 and MAXI J1348−630 were polarized with a polarization fraction of 26 ± 9°and > 56 % in the 300-1000 keV range, respectively. With no polarization information for MAXI J1535−571, the component detected could either come from the jets or the corona. In the case of MAXI J1820+070, the extrapolation of the synchrotron spectrum measured in the infrared indicates that the component is likely due to a nonthermal distribution of electrons from a hybrid corona. For MAXI J1348−630, the high fraction of polarization points toward a jets origin; however, we cannot formally conclude this without any infrared data giving information on the optically thin part of the synchrotron spectrum

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Multiwavelength observation of MAXI J1820+070 with MAGIC, VERITAS and H.E.S.S.

Cited by 2 publications

References 19 publications

The prototype X-ray binary GX 339–4: using TeV γ-rays to assess LMXBs as Galactic cosmic ray accelerators

The prototype X-ray binary GX 339–4: using TeV γ-rays to assess LMXBs as Galactic cosmic ray accelerators

INTEGRAL study of MAXI J1535−571, MAXI J1820+070, and MAXI J1348 − 630 outbursts

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