2015ApJ...803...10T


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.28CET16:40:51

2015ApJ...803...10T - Astrophys. J., 803, 10 (2015/April-2)

Swift and Fermi observations of X-ray flares: the case of late internal shock.

TROJA E., PIRO L., VASILEIOU V., OMODEI N., BURGESS J.M., CUTINI S., CONNAUGHTON V. and McENERY J.E.

Abstract (from CDS):

Simultaneous Swift and Fermi observations of gamma-ray bursts (GRBs) offer a unique broadband view of their afterglow emission, spanning more than 10 decades in energy. We present the sample of X-ray flares observed by both Swift and Fermi during the first three years of Fermi operations. While bright in the X-ray band, X-ray flares are often undetected at lower (optical), and higher (MeV to GeV) energies. We show that this disfavors synchrotron self-Compton processes as the origin of the observed X-ray emission. We compare the broadband properties of X-ray flares with the standard late internal shock model, and find that in this scenario, X-ray flares can be produced by a late-time relativistic (Γ > 50) outflow at radii R ∼ 1013-1014 cm. This conclusion holds only if the variability timescale is significantly shorter than the observed flare duration, and implies that X-ray flares can directly probe the activity of the GRB central engine.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: general - radiation mechanisms: non-thermal

Status at CDS:  

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 - 2020
#notes
1 GRB 090621A gB 00 43 56.80 +61 56 17.6           ~ 48 0
2 GRB 100117A gB 00 45 04.56 -01 35 41.7           ~ 104 0
3 GRB 091221 gB 03 43 11.40 +23 14 28.0           ~ 52 0
4 GRB 090407 gB 04 35 54.98 -12 40 45.5           ~ 53 0
5 GRB 100728A gB 05 55 01.99 -15 15 20.1           ~ 96 0
6 GRB 080928 gB 06 20 16.85 -55 11 59.3           ~ 126 1
7 GRB 110414A gB 06 31 29.43 +24 21 44.7           ~ 27 0
8 GRB 090831C gB 07 13 10.60 -25 06 44.0           ~ 21 0
9 GRB 090516A gB 09 12 59 -11 50.9           ~ 119 0
10 GRB 080906 gB 15 12 13 -80 32.4           ~ 42 0
11 GRB 081203A gB 15 32 07.6 +63 31 15           ~ 130 0
12 GRB 110102A gB 16 23 31.41 +07 36 49.8           ~ 42 0
13 GRB 110731A gB 18 42 00.99 -28 32 13.8           ~ 117 0
14 GRB 100725B gB 19 20 07 +76 57.3           ~ 40 0
15 GRB 100212A gB 23 45 40.39 +49 29 39.6           ~ 41 0

    Equat.    Gal    SGal    Ecl

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2020.03.28-16:40:51

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