scispace - formally typeset
Search or ask a question
Journal ArticleDOI

First Detection of Global Ionospheric Disturbances Associated with the Most Powerful Gamma Ray Burst GRB221009A

20 Jan 2023-Atmosphere-Vol. 14, Iss: 2, pp 217-217
TL;DR: In this paper , the first report of global ionospheric disturbances due to the most powerful Gamma Ray Burst GRB221009A occurred on 9 October 2022, and both daytime and nighttime effects were analyzed in VLF and LF bands.
Abstract: We present the first report of global ionospheric disturbances due to the most powerful Gamma Ray Burst GRB221009A occurred on 9 October 2022. Very Low Frequency (VLF) and Low Frequency (LF) sub-ionospheric radio signals are used to diagnose the effect of the GRB on the lower ionosphere. Both daytime and nighttime effects are analyzed in VLF and LF bands. The magnitude of VLF signal perturbations varied with the propagation condition (day/night), path length, and frequency of the signal. The recovery times for the VLF/LF signals to get back to their pre-GRB levels varied from 2–60 min. Radio signals reflected from the E-region ionosphere for nighttime VLF signals and daytime LF signals showed greater effects compared to the daytime VLF signals reflected from the lower parts of the D-region.

Content maybe subject to copyright    Report

Citations
More filters
Journal ArticleDOI
D. A. Kann, S. Agayeva, V. Aivazyan, S. Alishov, Chad Andrade, S. Antier, A. Baransky, Philippe Bendjoya, Zouhair Benkhaldoun, S. Beradze, D. R. Berezin, M. Boer, Eric Broens, Serge Brunier, Mattia Bulla, O. A. Burkhonov, Eric Burns, Y. B. Chen, M. Conti, Michael W. Coughlin, W. Cui, Frédéric Daigne, Benoit Delaveau, Hadrien A. R. Devillepoix, Tim Dietrich, D. Dornic, Franky Dubois, J.-G. Ducoin, Emeline Durand, P. A. Duverne, Heinz-Bernd Eggenstein, Sh. A. Ehgamberdiev, Anthony Fouad, Mark H. Freeberg, Dirk Froebrich, Ming-Yu Ge, Simone Gervasoni, V. Godunova, P. Gokuldass, Elchin J. Gurbanov, D Han, Elman Hasanov, P. Hello, T. Hussenot-Desenonges, R. Inasaridze, Abdusamatjan Iskandar, N. Ismailov, Asmae Janati, T. J. D. Laz, Shu-Mei Jia, S A Karpov, A. Kaeouach, R. W. Kiendrebeogo, A. Klotz, R Kneip, N. Kochiashvili, N. Kunert, Andrica Lekić, S. Leonini, C. K. Li, W. X. Li, X. B. Li, Jin-Yuan Liao, Ludwig Logie, F. J. Lu, J. Mao, D. Marchais, R. M'enard, David Morris, R. Sh. Natsvlishvili, Vsevolod Nedora, Kristin Noonan, K. Noysena, N. B. Orange, P. T.H. Pang, H Peng, C. Pellouin, J. Peloton, T. Pradier, O. Pyshna, Y. Rajabo, Steve Rau, C. Rinner, J.-P. Rivet, F. D. Romanov, Paolo Rosi, V. Rupchandani, M. Serrau, A. Shokry, A. Simon, K. Smith, O Sokoliuk, Mena Soliman, L. M. Song, Ali Takey, Yusufjon Tillayev, L. M. Tinjaca Ramirez, I. Tosta e Melo, D. Turpin, A. de Ugarte Postigo, Siegfried Vanaverbeke, V. Vasylenko, David Vernet, Z. Vidadi, C. Wang, J. Wang, L. Wang, X. F. Wang, Shaolin Xiong, Y. Xu, W. C. Xue, X. Y. Zeng, S. N. Zhang, H. S. Zhao, Xu Zhao 
TL;DR: In this paper , the optical afterglow of the gamma-ray burst (GRB 221009A) was studied using the GRANDMA+HXMT-LE+XRT data sets augmented with data from the literature up to 60 days.
Abstract: Object GRB 221009A is the brightest gamma-ray burst (GRB) detected in more than 50 yr of study. In this paper, we present observations in the X-ray and optical domains obtained by the GRANDMA Collaboration and the Insight Collaboration. We study the optical afterglow with empirical fitting using the GRANDMA+HXMT-LE data sets augmented with data from the literature up to 60 days. We then model numerically using a Bayesian approach, and we find that the GRB afterglow, extinguished by a large dust column, is most likely behind a combination of a large Milky Way dust column and moderate low-metallicity dust in the host galaxy. Using the GRANDMA+HXMT-LE+XRT data set, we find that the simplest model, where the observed afterglow is produced by synchrotron radiation at the forward external shock during the deceleration of a top-hat relativistic jet by a uniform medium, fits the multiwavelength observations only moderately well, with a tension between the observed temporal and spectral evolution. This tension is confirmed when using the augmented data set. We find that the consideration of a jet structure (Gaussian or power law), the inclusion of synchrotron self-Compton emission, or the presence of an underlying supernova do not improve the predictions. Placed in the global context of GRB optical afterglows, we find that the afterglow of GRB 221009A is luminous but not extraordinarily so, highlighting that some aspects of this GRB do not deviate from the global known sample despite its extreme energetics and the peculiar afterglow evolution.

2 citations

Journal ArticleDOI
TL;DR: In this paper , the effects of the gamma-ray burst GRB 221009A were studied by electron and proton detectors on board the four spacecraft of the NASA THEMIS mission.
Abstract: We present the first results study of the effects of the powerful gamma-ray burst GRB 221009A that occurred on 2022 October 9, and was serendipitously recorded by electron and proton detectors on board the four spacecraft of the NASA THEMIS mission. Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars, and, among them, GRB 221009A is so far the brightest burst ever observed due to its enormous energy (E γ iso ≈ 1055 erg) and proximity (the redshift is z ≈ 0.1505). The THEMIS mission launched in 2008 was designed to study the plasma processes in the Earth’s magnetosphere and the solar wind. The particle flux measurements from the two inner magnetosphere THEMIS probes, THA and THE, and two outer probes (renamed ARTEMIS after 2010), THB and THC, orbiting the Moon captured the dynamics of GRB 221009A with a high time resolution of 4 (up to 8) measurements per second. This allowed us to resolve the fine structure of the GRB and determine the temporal scales of the two main bursts’ spiky structure, complementing the results from gamma-ray space telescopes and detectors.

1 citations

References
More filters
Journal ArticleDOI
TL;DR: In this paper, the phase and amplitude anomalies in subionospheric LF signal (40 kHz) along the path Japan-Kamchatka of 2300 km were studied for the data observed by means of a digital OminiPAL receiver for 2 years.
Abstract: The phase (P) and amplitude (A) anomalies in subionospheric LF signal (40 kHz) along the path Japan–Kamchatka of 2300 km have been studied for the data observed by means of a digital OminiPAL receiver for 2 years. The empirical model of background P and A daily variations for quiet and disturbed geomagnetic conditions in the absence of seismic activity is developed. We pay special attention to the P and A features during large magnetic storms. A sensitivity threshold of LF signal to deforming influence of the geomagnetic and seismic factors is defined. Two cases of bay-like behavior of LF phase and amplitude in nighttime are described as a clear earthquake precursor of LF signal. We have found from the statistical study that LF signal effect is observed only for earthquakes with M⩾5.5 and we discuss the possible mechanisms of the effect.

154 citations

Journal ArticleDOI
TL;DR: In this article, the electron densities of the D-region were determined from observations of VLF subionospheric amplitude changes and these enhancements were then related to the magnitudes of the X-ray fluxes measured by the GOES satellites.

119 citations

Journal ArticleDOI
TL;DR: In this article, the authors used the continuity equation for the electron component and the amplitude time delay to estimate the effective recombination coefficient for the D-region during solar flares, which was found to be in good agreement with measurements by different techniques, as well as with the independent estimates of β and H ′.

92 citations

Journal ArticleDOI
TL;DR: In this paper, a gigantic periodic flare from the soft γ repeater SGR 1900+14 produced enhanced ionization at ionospheric altitudes of 30 to 90 km, which was observed as unusually large amplitude and phase changes of very low frequency (VLF) signals propagating in the Earth-ionosphere waveguide.
Abstract: A gigantic periodic flare from the soft γ repeater SGR 1900+14 produced enhanced ionization at ionospheric altitudes of 30 to 90 km, which was observed as unusually large amplitude and phase changes of very low frequency (VLF) signals propagating in the Earth-ionosphere waveguide. The VLF signals remained perturbed for ∼5 min and exhibited the 5.16 s periodicity of the giant flare detected on the Ulysses spacecraft [Hurley et al., 1999]. Quantitative analysis indicates the presence of an intense initial low energy (3–10 keV) photon component that was not detectable by the Ulysses instrument.

86 citations