X-ray flares in early GRB afterglows

被引：44

作者：

Burrows, D. N.

Falcone, A.

Chincarini, G.

Morris, D.

Romano, P.

Hill, J. E.

Godet, O.

Moretti, A.

Krimm, H.

Osborne, J. P.

Racusin, J.

Mangano, V.

Page, K.

Perri, M.

Stroh, M.

机构：

[1] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[2] Osservatorio Astrofis Brera, INAF, I-23807 Merate, Italy

[3] Univ Milan, Dept Fis, I-20126 Milan, Italy

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[5] Univ Space Res Assoc, Columbia, MD 21044 USA

[6] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[7] Inst Astrofis Spaz & Fis Cosm, INAF, I-90146 Palermo, Italy

[8] ASI Sci Data Ctr, I-00044 Frascati, Italy

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2007年 / 365卷 / 1854期

基金：

英国科学技术设施理事会;

关键词：

gamma-ray bursts; gamma-ray burst afterglows; X-ray flares;

D O I：

10.1098/rsta.2006.1970

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Swift X-ray Telescope (XRT) has discovered that flares are quite common in early X-ray afterglows of gamma-ray bursts (GRBs), being observed in roughly 50% of afterglows with prompt follow-up observations. The flares range influence from a few per cent to approximately 100% of the fluence of the prompt emission (the GRB). Repetitive flares are seen, with more than four successive flares detected by the XRT in some afterglows. The rise and fall times of the flares are typically considerably smaller than the time since the burst. These characteristics suggest that the flares are related to the prompt emission mechanism, but at lower photon energies. We conclude that the most likely cause of these flares is late-time activity of the GRB central engine.

引用

页码：1213 / 1226

页数：14

共 50 条

[1] Swift XRT observations of X-ray flares in GRB afterglows
Burrows, DN
Romano, P
Godet, O
Falcone, A
Pagani, C
Cusumano, G
Campana, S
Chincarini, G
Hill, JE
Giommi, P
Goad, MR
Kennea, JA
Kobayashi, S
Mészáros, P
Nousek, JA
Osborne, JP
O'Brien, PT
Page, KL
Tagliaferri, G
Zhang, B
PROCEEDINGS OF THE X-RAY UNIVERSE 2005, VOLS 1 AND 2, 2006, 604 : 877 - +
[2] Global properties of X-ray afterglows of GRB
Piro, L.
NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS, 2005, 28 (4-5): : 473 - 480
[3] The interpretation of the swift GRB X-ray afterglows
Fan, Yi-Zhong
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-BASIC TOPICS IN PHYSICS, 2006, 121 (10-11): : 1247 - 1251
[4] Global properties of X-ray afterglows of GRB
Piro, L
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-COLLOQUIA ON PHYSICS, 2005, 28 (4-5): : 473 - 480
[5] X-ray hardness evolution in GRB afterglows and flares:: Late-time GRB activity without NH variations
Butler, Nathaniel R.
Kocevski, Daniel
ASTROPHYSICAL JOURNAL, 2007, 663 (01): : 407 - 419
[6] Observations of GRB X-ray afterglows with SODART/SRG
Brandt, S
Lund, N
Pedersen, H
Castro-Tirado, AJ
Priedhorsky, WC
PHYSICA SCRIPTA, 1998, T77 : 93 - 94
[7] On the anomalous X-ray afterglows of GRB 970508 and 970828
Vietri, M
Perola, C
Piro, L
Stella, L
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 308 (04) : L29 - L33
[8] Late-time x-ray flares during GRB afterglows:: Extended internal engine activity
Falcone, A. D.
Burrows, D. N.
Romano, P.
Kobayashi, S.
Lazzati, D.
Zhang, B.
Campana, S.
Chincarini, G.
Cusumano, G.
Gehrels, N.
Giommi, P.
Goad, M. R.
Godet, O.
Hill, J. E.
Kennea, J. A.
Meszaros, P.
Morris, D.
Nousek, J. A.
O'Brien, P. T.
Osborne, J. P.
Pagani, C.
Pagei, K.
Tagliaferri, G.
GAMMA-RAY BURSTS IN THE SWIFT ERA, 2006, 836 : 386 - +
[9] Temporal variability of GRB early X-ray afterglows and GRB080319B prompt emission
Margutti, R.
Guidorzi, C.
Chincarini, G.
Pasotti, F.
Covino, S.
Mao, J.
2008 NANJING GAMMA-RAY BURST CONFERENCE, 2008, 1065 : 259 - 262
[10] Can GRB early X-ray afterglows be explained by a contribution from the reverse shock?
Genet, F.
Daigne, F.
Mochkovitch, R.
GAMMA-RAY BURSTS IN THE SWIFT ERA, 2006, 836 : 313 - +

← 1 2 3 4 5 →