GRB 221009A, its Precursor and Two Afterglows in the Fermi Data

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GRB 221009A, its Precursor and Two Afterglows in the Fermi Data. / Stern, B.; Ткачев, Игорь Иванович.

In: JETP Letters, Vol. 118, No. 8, 2023, p. 553-559.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7352fbe79fd54b7794e3a6e6a3bc2a19,

title = "GRB 221009A, its Precursor and Two Afterglows in the Fermi Data",

abstract = "We study GRB 221009A, the brightest gamma-ray burst in the history of observations, using Fermi data. To calibrate them for large inclination angles, we use the Vela X gamma-ray source. Light curves in different spectral ranges demonstrate a 300 s overlap of afterglow and delayed episodes of soft prompt emission. We demonstrate that a relatively weak burst precursor that occurs 3min before the main episode has its own afterglow, i.e., presumably, its own external shock. This is the first observation of such phenomenon which rules out some theoretical models of GRB precursors. The main afterglow is the brightest one, includes a photon with an energy of 400GeV 9 h after the burst, we show that it is visible in the LAT data for up to two days.",

author = "B. Stern and Ткачев, {Игорь Иванович}",

note = "We thank Fermi team for the excellent data base and NASA for the open data policy. The work of I.Tkachev was supported by the Russian Science Foundation grant 23-42-00066.",

year = "2023",

doi = "10.1134/S0021364023602919",

language = "English",

volume = "118",

pages = "553--559",

journal = "JETP Letters",

issn = "0021-3640",

publisher = "MAIK NAUKA/INTERPERIODICA/SPRINGER",

number = "8",

}

RIS

TY - JOUR

T1 - GRB 221009A, its Precursor and Two Afterglows in the Fermi Data

AU - Stern, B.

AU - Ткачев, Игорь Иванович

N1 - We thank Fermi team for the excellent data base and NASA for the open data policy. The work of I.Tkachev was supported by the Russian Science Foundation grant 23-42-00066.

PY - 2023

Y1 - 2023

N2 - We study GRB 221009A, the brightest gamma-ray burst in the history of observations, using Fermi data. To calibrate them for large inclination angles, we use the Vela X gamma-ray source. Light curves in different spectral ranges demonstrate a 300 s overlap of afterglow and delayed episodes of soft prompt emission. We demonstrate that a relatively weak burst precursor that occurs 3min before the main episode has its own afterglow, i.e., presumably, its own external shock. This is the first observation of such phenomenon which rules out some theoretical models of GRB precursors. The main afterglow is the brightest one, includes a photon with an energy of 400GeV 9 h after the burst, we show that it is visible in the LAT data for up to two days.

AB - We study GRB 221009A, the brightest gamma-ray burst in the history of observations, using Fermi data. To calibrate them for large inclination angles, we use the Vela X gamma-ray source. Light curves in different spectral ranges demonstrate a 300 s overlap of afterglow and delayed episodes of soft prompt emission. We demonstrate that a relatively weak burst precursor that occurs 3min before the main episode has its own afterglow, i.e., presumably, its own external shock. This is the first observation of such phenomenon which rules out some theoretical models of GRB precursors. The main afterglow is the brightest one, includes a photon with an energy of 400GeV 9 h after the burst, we show that it is visible in the LAT data for up to two days.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85174153532&origin=inward&txGid=547f4cbb56dfdeb6a48aca572eb86dc6

UR - https://www.mendeley.com/catalogue/dfb5a8a4-2eb5-39aa-becf-5a1dbcb9a84a/

U2 - 10.1134/S0021364023602919

DO - 10.1134/S0021364023602919

M3 - Article

VL - 118

SP - 553

EP - 559

JO - JETP Letters

JF - JETP Letters

SN - 0021-3640

IS - 8

ER -

ID: 59180755