X-RAY SPECTRAL COMPONENTS OBSERVED IN THE AFTERGLOW OF GRB 130925A

被引：19

作者：

Bellm, Eric C. ^{[1
]}

Barriere, Nicolas M. ^{[2
]}

Bhalerao, Varun ^{[3
]}

Boggs, Steven E. ^{[2
]}

Cenko, S. Bradley ^{[4
]}

Christensen, Finn E. ^{[5
]}

Craig, William W. ^{[2
,6
]}

Forster, Karl ^{[1
]}

Fryer, Chris L. ^{[7
]}

Hailey, Charles J. ^{[8
]}

Harrison, Fiona A. ^{[1
]}

Horesh, Assaf ^{[9
]}

Kouveliotou, Chryssa ^{[10
]}

Madsen, Kristin K. ^{[1
]}

Miller, Jon M. ^{[11
]}

Ofek, Eran O. ^{[9
]}

Perley, Daniel A. ^{[1
]}

Rana, Vikram R. ^{[1
]}

Reynolds, Stephen P. ^{[12
]}

Stern, Daniel ^{[13
]}

Tomsick, John A. ^{[2
]}

Zhang, William W. ^{[4
]}

机构：

[1] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA

[2] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[3] Interuniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India

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

[5] Tech Univ Denmark, DTU Space Natl Space Inst, DK-2800 Lyngby, Denmark

[6] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[7] Los Alamos Natl Lab, CCS 2, Los Alamos, NM 87545 USA

[8] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[9] Weizmann Inst Sci, Benoziyo Ctr Astrophys, IL-76100 Rehovot, Israel

[10] NASA, George C Marshall Space Flight Ctr, Astrophys Off ZP12, Huntsville, AL 35812 USA

[11] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[12] NC State Univ, Dept Phys, Raleigh, NC 27695 USA

[13] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2014年 / 784卷 / 02期

基金：

美国国家航空航天局;

关键词：

gamma-ray burst: individual (GRB 130925A); BURST; SUPERNOVA; SEARCH; STAR; SIGNATURES; EMISSION; OUTBURST; FALLBACK; PROMPT; EJECTA;

D O I：

10.1088/2041-8205/784/2/L19

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have identified spectral features in the late-time X-ray afterglow of the unusually long, slow-decaying GRB 130925A using NuSTAR, Swift/X-Ray Telescope, and Chandra. A spectral component in addition to an absorbed power law is required at >4 sigma significance, and its spectral shape varies between two observation epochs at 2 x 10(5) and 10(6) s after the burst. Several models can fit this additional component, each with very different physical implications. A broad, resolved Gaussian absorption feature of several keV width improves the fit, but it is poorly constrained in the second epoch. An additive blackbody or second power-law component provide better fits. Both are challenging to interpret: the blackbody radius is near the scale of a compact remnant (10(8) cm), while the second power-law component requires an unobserved high-energy cutoff in order to be consistent with the non-detection by Fermi/Large Area Telescope.

引用

页数：5

共 47 条

[1] Super-Eddington black hole accretion: Polish doughnuts and slim disks
Abramowicz, MA
[J]. GROWING BLACK HOLES: ACCRETION IN A COSMOLOGICAL CONTEXT, 2005, : 257 - 273
[2] Discovery of a transient absorption edge in the X-ray spectrum of GRB 990705
Amati, L
Frontera, F
Vietri, M
in't Zand, JJM
Soffitta, P
Costa, E
Del Sordo, S
Pian, E
Piro, L
Antonelli, LA
Dal Fiume, D
Feroci, M
Gandolfi, G
Guidorzi, C
Heise, J
Kuulkers, E
Masetti, N
Montanari, E
Nicastro, L
Orlandini, M
Palazzi, E
[J]. SCIENCE, 2000, 290 (5493) : 953 - 955
[3] [Anonymous], GCN
[4] [Anonymous], GCN
[5] [Anonymous], GCN
[6] Bellm E. C., 2013, GCN, V15286, P1
[7] A Possible Relativistic Jetted Outburst from a Massive Black Hole Fed by a Tidally Disrupted Star
Bloom, Joshua S.
Giannios, Dimitrios
Metzger, Brian D.
Cenko, S. Bradley
Perley, Daniel A.
Butler, Nathaniel R.
Tanvir, Nial R.
Levan, Andrew J.
Brien, Paul T. O'
Strubbe, Linda E.
De Colle, Fabio
Ramirez-Ruiz, Enrico
Lee, William H.
Nayakshin, Sergei
Quataert, Eliot
King, Andrew R.
Cucchiara, Antonino
Guillochon, James
Bower, Geoffrey C.
Fruchter, Andrew S.
Morgan, Adam N.
van der Horst, Alexander J.
[J]. SCIENCE, 2011, 333 (6039) : 203 - 206
[8] Relativistic jet activity from the tidal disruption of a star by a massive black hole
Burrows, D. N.
Kennea, J. A.
Ghisellini, G.
Mangano, V.
Zhang, B.
Page, K. L.
Eracleous, M.
Romano, P.
Sakamoto, T.
Falcone, A. D.
Osborne, J. P.
Campana, S.
Beardmore, A. P.
Breeveld, A. A.
Chester, M. M.
Corbet, R.
Covino, S.
Cummings, J. R.
D'Avanzo, P.
D'Elia, V.
Esposito, P.
Evans, P. A.
Fugazza, D.
Gelbord, J. M.
Hiroi, K.
Holland, S. T.
Huang, K. Y.
Im, M.
Israel, G.
Jeon, Y.
Jeon, Y. -B.
Jun, H. D.
Kawai, N.
Kim, J. H.
Krimm, H. A.
Marshall, F. E.
Meszaros, P.
Negoro, H.
Omodei, N.
Park, W. -K.
Perkins, J. S.
Sugizaki, M.
Sung, H. -I.
Tagliaferri, G.
Troja, E.
Ueda, Y.
Urata, Y.
Usui, R.
Antonelli, L. A.
Barthelmy, S. D.
[J]. NATURE, 2011, 476 (7361) : 421 - 424
[9] Burrows D. N., 2013, GCN, V15253, P1
[10] Campana S, 2006, NATURE, V442, P1008, DOI [10.1038/nature04892, 10.1038/natureO4892]

← 1 2 3 4 5 →