Chromatic Afterglow of GRB 200829A

Pankov, N. S.; Pozanenko, A. S.; Minaev, P. Yu.; Belkin, S. O.; Volnova, A. A.; Reva, I. V.; Serebryanskii, A. V.; Krugov, M. A.; Naroenkov, S. A.; Novichonok, A. O.; Zhornichenko, A. A.; Rumyantsev, V. V.; Antonyuk, K. A.; Egamberdiev, Sh. A.; Burkhonov, O. A.; Klunko, E. V.; Moskvitin, A. S.; Molotov, I. E.; Inasaridze, R. Ya.

doi:10.1134/s1063773723030052

Cited by 2 publications

(2 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, we also collected the optical data from Gammaray Coordination Network (GCN) for our analysis, including observations from SAO RAS 1 m telescope (Moskvitin & GRB follow-up Team 2021; Moskvitin et al 2021), ZTSh 2.6 m telescope of CrAO observatory (Pankov et al 2021c(Pankov et al , 2021dRumyantsev et al 2021), 0.3 m telescope at University of Siena Observatory (Marchini et al 2021), 0.28 m f7 SCT telescope (Vreeswijk & Broens 2021), 0.76 m Katzman Automatic Imaging Telescope (Zheng et al 2021a(Zheng et al , 2021b, MITSuME 50 cm telescope Akeno (Noto et al 2021), AS-32 telescope of…”

Section: Observationsmentioning

confidence: 99%

GRB 210610B: The Internal and External Plateau as Evidence for the Delayed Outflow of Magnetar

Wei 韦,

Wang 王,

Lin 林

et al. 2024

Res. Astron. Astrophys.

View full text Add to dashboard Cite

After launching a jet, outflows of magnetar were used to account for the achromatic plateau of afterglow and the early X-ray flux plateau known as "internal plateau''. The lack of detecting magnetic dipole emission together with the energy injection feature in a single observation poses confusion until the long gamma-ray burst (GRB) 210610B is detected. GRB 210610B is presented with an optical bump following an early X-ray plateau during the afterglow phase. The plateau followed by a steep decline flux overlays in the steadily decaying X-ray flux with index α X,1 ∼ 2.06, indicating an internal origin and that can be fitted by the spin-down luminosity law with the initial plateau luminosity log10 L X ∼ 48.29 erg s-1 and the characteristic spin-down timescale T ∼ 2818 s. A subsequent bump begins at ∼ 4000 s in R band with a rising index α R,1 ∼ -0.30 and peaks at ∼ 14125 s, after which a decay index α R,2 ∼ 0.87 and finally transiting to a steep decay with α R,3 ∼ 1.77 achieve the closure relation of the external shock for the normal decay phase as well as the magnetar spin-down energy injection phase, provided that the average value of the photon index Γγ = 1.80 derived from the spectral energy distributions (SEDs) between the X-ray and optical afterglow. The closure relation also works for the late X-ray flux. Akin to the traditional picture of GRB, the outflow powers the early X-ray plateau by dissipating energy internally and collides with the leading decelerating blast burst as time goes on, which could interpret the exotic feature of GRB 210610B. We carry out a Markov Chain Monte Carlo (MCMC) simulation and obtain a set of best parameters: ε B ≈ 4.2 × 10-5, ε e ≈ 0.16, E K,iso ≈ 4.2× 1053 ergs, Γ0 ≈ 851, A*  ≈ 0.11, L inj,0 ≈ 2.31 × 1050 erg s-1. The artificial light curve can fit the afterglow data well. After that, we estimated the average Lorentz factor and the X-ray radiation efficiency of the later ejecta are 35 and 0.13%, respectively.

show abstract

Section: Observationsmentioning

confidence: 99%

GRB 210610B: The Internal and External Plateau as Evidence for the Delayed Outflow of Magnetar

Wei 韦,

Wang 王,

Lin 林

et al. 2024

Res. Astron. Astrophys.

View full text Add to dashboard Cite

show abstract

“…Figure 9 presents the possible kilonova emission in r-band at redshift z = 0.01, 0.37 and 1. We also collect the upper limits of optical observations from GCN followed GRB 210323A to compare with the calculated kilonova emission (e.g., Global MASTER-Net, Swift/UVOT, GMOS, GTC, NOT, Mondy, Kitab and Nanshan; (Breeveld 2021;de Ugarte Postigo et al 2021;Fu et al 2021;Lipunov et al 2021;Malesani et al 2021;Pankov et al 2021;Pozanenko et al 2021;Rastinejad et al 2021;Tiurina et al 2021), and plot in Figure 9. The numerical calculation shows that the kilonova cannot be detected at redshift z > 0.37.…”

Section: Possible Kilonova Emissionmentioning

confidence: 99%

GRB 210323A: Signature of Long-lasting Lifetime of Supra-massive Magnetar as the Central Engine from the Merger of Binary Neutron Star

Shan,

Liu,

Yang

et al. 2024

Res. Astron. Astrophys.

View full text Add to dashboard Cite

Theoretically, a supra-massive neutron star or magnetar can be produced after mergers of binary neutron star. GRB 210323A is a short-duration gamma-ray burst (GRB) with a duration of lasting $\sim 1$ s. The light curve of prompt emission of GRB 210323A shows a signal-peaked structure, and a cutoff power-law model can be invoked to fit the spectra with $E_p=1826\pm 747$. More interestingly, it has an extremely long-lasting plateau emission in the X-ray afterglow with a duration of $\sim 10^{4}$ s, and then follows a rapid decay with a decay slope $\sim 3.2$. By invoking the external shock model, it is hard to explain this temporal feature of X-ray emission. In this paper, we suggest that the observed long-lasting X-ray plateau emission can be caused by the energy injection from supra-massive magnetar, and the abrupt decay following the long-lasting X-ray plateau emission is explained by supra-massive magnetar collapsing into a black hole. This is the first short-duration GRB, whose long-lasting X-ray emission powered by a supra-massive neutron star. On the other hand, the physical parameters of a supra-massive magnetar can be roughly estimated, and compare with other short GRBs. We also discuss the possible GW emission which powered by a supra-massive magnetar and its detectability. Moreover, we calculate the possible kilonova emission which powered by R-process and magnetar spin-down to compare with the observed data.

show abstract

Chromatic Afterglow of GRB 200829A

Cited by 2 publications

References 85 publications

GRB 210610B: The Internal and External Plateau as Evidence for the Delayed Outflow of Magnetar

GRB 210610B: The Internal and External Plateau as Evidence for the Delayed Outflow of Magnetar

GRB 210323A: Signature of Long-lasting Lifetime of Supra-massive Magnetar as the Central Engine from the Merger of Binary Neutron Star

Contact Info

Product

Resources

About