SGRJ 1550-5418 BURSTS DETECTED WITH THE FERMI GAMMA-RAY BURST MONITOR DURING ITS MOST PROLIFIC ACTIVITY

被引：66

作者：

van der Horst, A. J. ^{[1
,2
]}

Kouveliotou, C. ^{[3
]}

Gorgone, N. M. ^{[4
]}

Kaneko, Y. ^{[5
]}

Baring, M. G. ^{[6
]}

Guiriec, S. ^{[7
,8
]}

Gogus, E. ^{[5
]}

Granot, J. ^{[9
,10
,11
]}

Watts, A. L. ^{[2
]}

Lin, L. ^{[5
,7
,12
]}

Bhat, P. N. ^{[7
]}

Bissaldi, E. ^{[13
]}

Chaplin, V. L. ^{[7
]}

Finger, M. H. ^{[1
]}

Gehrels, N. ^{[8
]}

Gibby, M. H. ^{[14
]}

Giles, M. M. ^{[14
]}

Goldstein, A. ^{[7
]}

Gruber, D. ^{[13
]}

Harding, A. K. ^{[8
]}

Kaper, L. ^{[2
]}

von Kienlin, A. ^{[13
]}

van der Klis, M. ^{[2
]}

McBreen, S. ^{[15
]}

Mcenery, J. ^{[8
]}

Meegan, C. A. ^{[1
]}

Paciesas, W. S. ^{[7
]}

Pe'er, A. ^{[16
]}

Preece, R. D. ^{[7
]}

Ramirez-Ruiz, E. ^{[17
]}

Rau, A. ^{[13
]}

Wachter, S. ^{[18
]}

Wilson-Hodge, C. ^{[3
]}

Woods, P. M. ^{[19
]}

Wijers, R. A. M. J. ^{[2
]}

机构：

[1] NSSTC, Univ Space Res Assoc, Huntsville, AL 35805 USA

[2] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1090 GE Amsterdam, Netherlands

[3] NASA, Space Sci Off, VP62, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[4] Connecticut Coll, New London, CT 06320 USA

[5] Sabanci Univ, TR-34956 Istanbul, Turkey

[6] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA

[7] Univ Alabama, CSPAR, Huntsville, AL 35805 USA

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

[9] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[10] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[11] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[12] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[13] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[14] Jacobs Technol Inc, Huntsville, AL USA

[15] Univ Coll Dublin, Dublin 4, Ireland

[16] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[17] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[18] CALTECH, IPAC, Pasadena, CA 91125 USA

[19] Corvid Technol, Huntsville, AL 35806 USA

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 749卷 / 02期

基金：

美国国家科学基金会;

关键词：

pulsars: individual (SGR J1550-5418; 1E; 1547.0-5408; PSR J1550-5418); stars: neutron; X-rays: bursts; PULSAR; 1E; 1547.0-5408; MAGNETIZED NEUTRON-STARS; STATISTICAL PROPERTIES; 2009; OUTBURST; EMISSION; REPEATERS; SGR-1900+14; 1E-1547.0-5408; MAGNETARS; SOFT-GAMMA-REPEATER-1806-20;

D O I：

10.1088/0004-637X/749/2/122

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have performed detailed temporal and time-integrated spectral analysis of 286 bursts from SGR J1550-5418 detected with the Fermi Gamma-ray Burst Monitor (GBM) in 2009 January, resulting in the largest uniform sample of temporal and spectral properties of SGR J1550-5418 bursts. We have used the combination of broadband and high time-resolution data provided with GBM to perform statistical studies for the source properties. We determine the durations, emission times, duty cycles, and rise times for all bursts, and find that they are typical of SGR bursts. We explore various models in our spectral analysis, and conclude that the spectra of SGR J1550-5418 bursts in the 8-200 keV band are equally well described by optically thin thermal bremsstrahlung (OTTB), a power law (PL) with an exponential cutoff (Comptonized model), and two blackbody (BB) functions (BB+BB). In the spectral fits with the Comptonized model, we find a mean PL index of -0.92, close to the OTTB index of -1. We show that there is an anti-correlation between the Comptonized E-peak and the burst fluence and average flux. For the BB+BB fits, we find that the fluences and emission areas of the two BB functions are correlated. The low-temperature BB has an emission area comparable to the neutron star surface area, independent of the temperature, while the high-temperature BB has a much smaller area and shows an anti-correlation between emission area and temperature. We compare the properties of these bursts with bursts observed from other SGR sources during extreme activations, and discuss the implications of our results in the context of magnetar burst models.

引用

页数：12

共 63 条

[1] Arnaud KA, 1996, ASTR SOC P, V101, P17
[2] Bellm E., 2009, GRB COORDINATES NETW, V8857, P1
[3] Corona of magnetars
Beloborodov, Andrei M.
Thompson, Christopher
[J]. ASTROPHYSICAL JOURNAL, 2007, 657 (02) : 967 - 993
[4] Multi-instrument X-ray monitoring of the January 2009 outburst from the recurrent magnetar candidate 1E 1547.0-5408
Bernardini, F.
Israel, G. L.
Stella, L.
Turolla, R.
Esposito, P.
Rea, N.
Zane, S.
Tiengo, A.
Campana, S.
Goetz, D.
Mereghetti, S.
Romano, P.
[J]. ASTRONOMY & ASTROPHYSICS, 2011, 529
[5] Ground-based calibration and characterization of the Fermi gamma-ray burst monitor detectors
Bissaldi, E.
von Kienlin, A.
Lichti, G.
Steinle, H.
Bhat, P. N.
Briggs, M. S.
Fishman, G. J.
Hoover, A. S.
Kippen, R. M.
Krumrey, M.
Gerlach, M.
Connaughton, V.
Diehl, R.
Greiner, J.
van der Horst, A. J.
Kouveliotou, C.
McBreen, S.
Meegan, C. A.
Paciesas, W. S.
Preece, R. D.
Wilson-Hodge, C. A.
[J]. EXPERIMENTAL ASTRONOMY, 2009, 24 (1-3) : 47 - 88
[6] The magnetar 1E 1547.0-5408: Radio spectrum, polarimetry, and timing
Camilo, F.
Reynolds, J.
Johnston, S.
Halpern, J. P.
Ransom, S. M.
[J]. ASTROPHYSICAL JOURNAL, 2008, 679 (01) : 681 - 686
[7] 1E 1547.0-5408: A radio-emitting magnetar with a rotation period of 2 seconds
Camilo, F.
Ransom, S. M.
Halpern, J. P.
Reynolds, J.
[J]. ASTROPHYSICAL JOURNAL, 2007, 666 (02) : L93 - L96
[8] Transient pulsed radio emission from a magnetar
Camilo, Fernando
Ransom, Scott M.
Halpern, Jules P.
Reynolds, John
Helfand, David J.
Zimmerman, Neil
Sarkissian, John
[J]. NATURE, 2006, 442 (7105) : 892 - 895
[9] Chakrabarti S. K., 2009, GRB COORDINATES NETW, V8881, P1
[10] Connaughton V., 2009, GRB COORDINATES NETW, V8835, P1

← 1 2 3 4 5 6 7 →