2023ApJ...952L..42L

Query : 2023ApJ...952L..42L

2023ApJ...952L..42L - Astrophys. J., 952, L42 (2023/August-1)

Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow.

LESAGE S., VERES P., BRIGGS M.S., GOLDSTEIN A., KOCEVSKI D., BURNS E., WILSON-HODGE C.A., BHAT P.N., HUPPENKOTHEN D., FRYER C.L., HAMBURG R., RACUSIN J., BISSALDI E., CLEVELAND W.H., DALESSI S., FLETCHER C., GILES M.M., HRISTOV B.A., HUI C.M., MAILYAN B., MALACARIA C., POOLAKKIL S., ROBERTS O.J., VON KIENLIN A., WOOD J., AJELLO M., ARIMOTO M., BALDINI L., BALLET J., BARING M.G., BASTIERI D., BECERRA GONZALEZ J., BELLAZZINI R., BISSALDI E., BLANDFORD R.D., BONINO R., BRUEL P., BUSON S., CAMERON R.A., CAPUTO R., CARAVEO P.A., CAVAZZUTI E., CHIARO G., CIBRARIO N., CIPRINI S., CRISTARELLA ORESTANO P., CRNOGORCEVIC M., CUOCO A., CUTINI S., D'AMMANDO F., DE GAETANO S., DI LALLA N., DI VENERE L., DOMINGUEZ A., FEGAN S.J., FERRARA E.C., FLEISCHHACK H., FUKAZAWA Y., FUNK S., FUSCO P., GALANTI G., GAMMALDI V., GARGANO F., GASBARRA C., GASPARRINI D., GERMANI S., GIACCHINO F., GIGLIETTO N., GILL R., GIROLETTI M., GRANOT J., GREEN D., GRENIER I.A., GUIRIEC S., GUSTAFSSON M., HAYS E., HEWITT J.W., HORAN D., HOU X., KUSS M., LATRONICO L., LAVIRON A., LEMOINE-GOUMARD M., LI J., LIODAKIS I., LONGO F., LOPARCO F., LORUSSO L., LOVELLETTE M.N., LUBRANO P., MALDERA S., MANFREDA A., MARTI-DEVESA G., MAZZIOTTA M.N., McENERY J.E., MEREU I., MEYER M., MICHELSON P.F., MIZUNO T., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., NEGRO M., NUSS E., OMODEI N., ORLANDO E., ORMES J.F., PANEQUE D., PANZARINI G., PERSIC M., PESCE-ROLLINS M., PILLERA R., PIRON F., POON H., PORTER T.A., PRINCIPE G., RAINO S., RANDO R., RANI B., RAZZANO M., RAZZAQUE S., REIMER A., REIMER O., RYDE F., SANCHEZ-CONDE M., SAZ PARKINSON P.M., SCOTTON L., SERINI D., SGRO C., SHARMA V., SISKIND E.J., SPANDRE G., SPINELLI P., TAJIMA H., TORRES D.F., VALVERDE J., VENTERS T., WADIASINGH Z., WOOD K. and ZAHARIJAS G.

Abstract (from CDS):

We report the discovery of GRB 221009A, the highest flux gamma-ray burst (GRB) ever observed by the Fermi Gamma-ray Burst Monitor (Fermi-GBM). This GRB has continuous prompt emission lasting more than 600 s, which smoothly transitions to afterglow emission visible in the Fermi-GBM energy range (8 keV-40 MeV), and total energetics higher than any other burst in the Fermi-GBM sample. By using a variety of new and existing analysis techniques we probe the spectral and temporal evolution of GRB 221009A. We find no emission prior to the Fermi-GBM trigger time (t0; 2022 October 9 at 13:16:59.99 UTC), indicating that this is the time of prompt emission onset. The triggering pulse exhibits distinct spectral and temporal properties suggestive of the thermal, photospheric emission of shock breakout, with significant emission up to ∼15 MeV. We characterize the onset of external shock at t0 + 600 s and find evidence of a plateau region in the early-afterglow phase, which transitions to a slope consistent with Swift-XRT afterglow measurements. We place the total energetics of GRB 221009A in context with the rest of the Fermi-GBM sample and find that this GRB has the highest total isotropic-equivalent energy (Eγ,iso = 1.0 × 1055 erg) and second highest isotropic-equivalent luminosity (Lγ,iso = 9.9 × 1053 erg s–1) based on its redshift of z = 0.151. These extreme energetics are what allowed us to observe the continuously emitting central engine of Fermi-GBM from the beginning of the prompt emission phase through the onset of early afterglow.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray bursts

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 180720B gB 00 02 06.99 -02 55 07.8           ~ 215 0
2 GRB 201216C gB 01 05 28.88 +16 30 58.0           ~ 89 0
3 SN 2019oyw SN* 02 58 10.510 -08 57 27.20           ~ 218 0
4 GRB 190114C gB 03 38 01.18 -26 56 47.8           ~ 343 0
5 SN 2013cq SN* 11 32 32.84 +27 41 56.2           SNIc 613 1
6 1B 910711 gB 13 59.5 -16 23           ~ 33 0
7 SDSS J140910.47+275320.8 G 14 09 10.47535 +27 53 20.8393           ~ 279 0
8 Fermi bn160821937 gB 18 39 54.550 +62 23 30.35           ~ 190 0
9 SN 2022xiw SN* 19 13 03.502 +19 46 24.26           SNIc-BL 13 0
10 GRB 221009A gB 19 13 03.85 +19 46 22.7           ~ 433 0
11 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
12 GRB 160625B gB 20 34 23.67 +06 55 11.1           ~ 235 0
13 GRB 060614 G 21 23 32.140 -53 01 36.10           ~ 714 0
14 GRB 201015A gB 23 37 16.43 +53 24 57.6           ~ 74 0
15 GRB 931101B gB ~ ~           ~ 8 0

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