|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
24 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
INTEGRAL discovery of a burst with associated radio emission from the magnetar SGR 1935+2154 | | S. Mereghetti
; V. Savchenko
; C. Ferrigno
; D. Götz
; M. Rigoselli
; A. Tiengo
; A. Bazzano
; E. Bozzo
; A. Coleiro
; T. J.-L. Courvoisier
; M. Doyle
; A. Goldwurm
; L. Hanlon
; E. Jourdain
; A. von Kienlin
; A. Lutovinov
; A. Martin-Carrillo
; S. Molkov
; L. Natalucci
; F. Onori
; F. Panessa
; J. Rodi
; J. Rodriguez
; C. Sánchez-Fernández
; R. Sunyaev
; P. Ubertini
; | | Date: |
13 May 2020 | | Abstract: | We report on observations of the soft $gamma$-ray repeater SGR 1935+2154
carried out with the INTEGRAL satellite between 2020 April 28 and May 3, during
a period of bursting activity. Several short bursts with fluence in the range
$sim10^{-7}-10^{-6}$ erg cm$^{-2}$ were detected by the IBIS instrument in the
20-200 keV range. The burst with the hardest spectrum, discovered and localized
in real time by the INTEGRAL Burst Alert System, was spatially and temporally
coincident with a fast radio burst detected by the CHIME and STARE2 radio
telescopes at 400-880 MHz and 1.5 GHz, respectively. The burst light curve in
the 20-200 keV range shows two peaks separated by $sim$30 ms, superimposed on
a broad pulse lasting $sim$0.4 s. The burst spectrum over 0.3 s is well fit
with an exponentially cut-off power law with photon index $Gamma=0.75pm0.3$,
e-folding energy $E_0=52^{+14}_{-8}$ keV, and 20-200 keV flux $(1.5pm
0.1) imes10^{-6}$ erg cm$^{-2}$ s$^{-1}$. This is the first burst with a radio
counterpart observed from a soft $gamma$-ray repeater and it strongly supports
the models based on magnetars that have been proposed for extragalactic fast
radio bursts, despite the energy budget involved in the SGR 1935+2154 burst is
a factor $sim10^{8-9}$ smaller that that of sources at distances of hundreds
of Mpc. We also estimate for SGR 1935+2154 a distance in the range $sim$2-7
kpc, based on the analysis of an expanding dust scattering ring seen in X-rays
with the {it Neil Gehrels Swift Observatory} XRT instrument. | | Source: | arXiv, 2005.6335 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER