Possible low ionosphere response to very hard X-rays from Cygnus X-3 bursts in september 1972

Kaufmann, P.; Piazza, L. Rizzo; Ananthakrishnan, S.

doi:10.1007/bf00642822

Cited by 6 publications

(2 citation statements)

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“…Departure from the above described quiescent situation occurs when there are ionization excesses in the low ionosphere. The reasons for that can be external sources of radiation like X‐ray solar flares [ Bracewell and Straker , 1949; Kaufmann and Paes de Barros , 1969; Muraoka et al , 1977], X‐ray bursts from remote objects like magnetar bursts [ Kaufmann et al , 1973; Rizzo Piazza et al , 1983; Tanaka et al , 2008; Raulin et al , 2009a], or meteor showers [ Chilton , 1961; Kaufmann et al , 1989]. The electrical properties of the EIW can also change due to perturbations from the inside of the waveguide like atmospheric lightning causing precipitation of initially trapped electrons [ Cummer , 1997], Transient Luminous Effects (TLEs) like red sprites and elves [ Inan et al , 1995; Pasko et al , 1995], and natural phenomena related to seismic‐electromagnetic effects [ Hayakawa et al , 1996].…”

Section: Introductionmentioning

confidence: 99%

Solar flare detection sensitivity using the South America VLF Network (SAVNET)

et al. 2010

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[1] We present recent observations of Sudden Phase Anomalies due to subionospheric propagation anomalies produced by solar X-ray flares. We use the new South America VLF Network (SAVNET) to study 471 ionospheric events produced by solar flares during the period May 2006 to July 2009 which corresponds to the present minimum of solar activity. For this activity level, we find that 100% of the solar flares with a X-ray peak flux above 5 × 10 −7 W/m 2 in the 0.1-0.8 nm wavelength range produce a significant ionospheric disturbance, while the minimum X-ray flux needed to do so is about 2.7 × 10 −7 W/m 2 . We find that this latter minimum threshold is dependent on the solar cycle, increasing when the Sun is more active, thus confirming that the low ionosphere is more sensitive during periods of low solar activity. Also, our findings are in agreement with the idea that the ionospheric D-region is formed and maintained by the solar Lyman-a radiation outside solar flare periods.

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Section: Introductionmentioning

confidence: 99%

Solar flare detection sensitivity using the South America VLF Network (SAVNET)

et al. 2010

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“…The idea that sources from outer space can produce measurable effects in the lower atmosphere was investigated by VLF methods [3,5,6] and observed already by [4]. The principle is based on refraction of radio-waves by the lower atmosphere.…”

Section: Motivationmentioning

confidence: 99%

Gamma ray bursts detection capabilities of a sudden ionospheric disturbance SID detector.

Sapundjiev¹

2023

Proceedings of 27th European Cosmic Ray Symposium — PoS(ECRS)

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Cosmic gamma ray bursts(GRB) are high energetic photos resulting from astrophysical events within and beyond our galaxy. Their energy is deposited in the upper atmosphere by ionization of the constituent atoms and molecules. The resulting plasma affects the absorption and hence the propagation of radio waves in the VLF range which can be used to detect and analyse GRB. In this work we are investigating the response of a SID monitor to GRB by modelling the ionization by GBRs in the ionosphere and the effects on the radio wave propagation. Subsequently we discuss the potency of the SID monitor for detection and analysis of GRBs and the implications to space-weather monitoring and applications.

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Earth’s Ionosphere as a Detector for High Energy Extra-Solar Radiation

Mondal

2018

Astrophysics and Space Science Proceedings

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Possible low ionosphere response to very hard X-rays from Cygnus X-3 bursts in september 1972

Cited by 6 publications

References 13 publications

Solar flare detection sensitivity using the South America VLF Network (SAVNET)

Solar flare detection sensitivity using the South America VLF Network (SAVNET)

Gamma ray bursts detection capabilities of a sudden ionospheric disturbance SID detector.

Earth’s Ionosphere as a Detector for High Energy Extra-Solar Radiation

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