1051:
1061:
100:
of the
Universities Space Research Association (USRA) at NASA's Marshall Space Flight Center decided to test the hypothesis that soft gamma repeaters were magnetars. According to the hypothesis, the bursts would cause the object to slow down its rotation. In 1998, she made careful comparisons of the
299:
of −66°. The date of discovery sometimes appears in a format such as 1979/1986 to refer to the year the object was discovered, in addition to the year soft gamma repeaters were recognized as a separate class of objects rather than "normal" gamma-ray bursts.
128:, which are usually ionized by the Sun's radiation by day and recombine to neutral atoms by night, were ionized at nighttime at levels not much lower than the normal daytime level. The Rossi X-Ray Timing Explorer (
960:
139:, received its strongest signal from this burst at this time, even though it was directed at a different part of the sky, and should normally have been shielded from the radiation.
124:
observed on August 27, 1998. Despite the large distance to this SGR, estimated at 20,000 light years, the burst had large effects on the Earth's atmosphere. The atoms in the
800:
585:
549:
1024:
415:
536:
1034:
520:
983:
532:
105:. The period had increased by 0.008 seconds since 1993, and she calculated that this would be explained by a magnetar with a
1085:
1009:
988:
386:
244:
1095:
117:). This was enough to convince the international astronomical community that soft gamma repeaters are indeed magnetars.
78:
saw the burst at slightly different times, its direction could be determined, and it was shown to originate from near a
929:
978:
821:
184:
The most powerful soft gamma repeater burst yet recorded was observed coming from this object on
December 27, 2004.
775:
578:
993:
1064:
790:
760:
649:
608:
93:
were less energetic in the soft gamma-ray and hard X-ray range, and repeated bursts came from the same region.
707:
1054:
639:
83:
1029:
685:
571:
481:
459:
198:
317:
Zhang, Bing; Xu, R.X.; Qiao, G.J. (2000). "Nature and
Nurture: a Model for Soft Gamma-Ray Repeaters".
907:
895:
702:
336:
553:
1090:
880:
858:
740:
97:
423:
252:
218:
924:
902:
750:
692:
352:
326:
1014:
853:
780:
79:
826:
728:
344:
282:
206:
176:
164:
745:
735:
697:
445:
292:
133:
71:
340:
273:
235:
765:
755:
265:
106:
59:
1079:
955:
950:
919:
680:
665:
524:
477:
378:
356:
17:
831:
805:
675:
670:
594:
540:
189:
121:
114:
110:
75:
55:
890:
875:
841:
770:
296:
102:
27:
Astronomical object which emits bursts of gamma or x-rays at irregular intervals
1019:
934:
914:
885:
836:
785:
507:
On the persistent X-ray emission from the soft gamma-ray repeaters. Usov. 1996
261:
125:
865:
848:
463:
136:
43:
39:
226:
Rotates once every 2.07 seconds, holds the record for the fastest-spinning
89:
Over time it became clear that this was not a normal gamma-ray burst. The
870:
629:
506:
331:
291:
The numbers give the position in the sky, for example, SGR 0525-66 has a
285:
inside the Milky Way, and the first ever to be linked to a known source.
227:
51:
723:
558:
Scientists note 20th anniversary of March 5, 1979 gamma-ray burst event
795:
613:
521:"'Magnetars', Soft Gamma Repeaters & Very Strong Magnetic Fields"
90:
348:
383:
Magnetars', Soft Gamma
Repeaters & Very Strong Magnetic Fields
74:
was noted. As a number of receivers at different locations in the
50:
at irregular intervals. It is conjectured that they are a type of
47:
419:
129:
567:
563:
961:
Timeline of white dwarfs, neutron stars, and supernovae
120:
An unusually spectacular soft gamma repeater burst was
1002:
969:
943:
814:
716:
658:
622:
601:
416:""Magnetar" discovery solves 19-year-old mystery"
579:
8:
243:15,000 lyr away; X-ray outburst detected by
586:
572:
564:
330:
460:"Star Emits Intense Celestial Fireworks"
197:20,000 lyr away; powerful, affected the
149:
409:
407:
405:
403:
309:
372:
370:
368:
366:
523:. University of Texas. Archived from
281:30,000 lyr away; First ever detected
7:
1060:
478:"Giant eruption reveals 'dead' star"
147:Known soft gamma repeaters include:
260:A soft gamma repeater orbiting the
101:periodicity of soft gamma repeater
42:object which emits large bursts of
25:
1059:
1050:
1049:
801:Tolman–Oppenheimer–Volkoff limit
984:Fermi Gamma-ray Space Telescope
446:"McGill SGR/AXP Online Catalog"
548:Heintzmann, H. (Mar 5, 1999).
414:Dooling, Dave (May 20, 1998).
377:Duncan, Robert C. (May 1998).
1:
1010:X-ray pulsar-based navigation
989:Compton Gamma Ray Observatory
533:"Cosmic Flasher Reveals All!"
387:University of Texas at Austin
70:On March 5, 1979 a powerful
979:Rossi X-ray Timing Explorer
822:Gamma-ray burst progenitors
550:"Happy birthday, Magnetars"
1112:
1035:Most massive neutron stars
776:Quasi-periodic oscillation
247:satellite 22 August 2008.
1045:
994:Chandra X-ray Observatory
319:The Astrophysical Journal
761:Neutron-star oscillation
650:Rotating radio transient
1015:Tempo software program
556:on February 27, 2012.
84:Large Magellanic Cloud
1030:List of neutron stars
1025:The Magnificent Seven
482:European Space Agency
379:"The March 5th Event"
1086:Soft gamma repeaters
930:Thorne–Żytkow object
18:Soft gamma repeaters
1096:Astronomical events
881:Neutron star merger
741:Chandrasekhar limit
708:Hulse–Taylor pulsar
635:Soft gamma repeater
466:. 10 February 2009.
341:2000ApJ...545L.127Z
98:Chryssa Kouveliotou
54:or, alternatively,
32:soft gamma repeater
925:Pulsar wind nebula
903:Stellar black hole
519:Duncan, Robert C.
199:Earth's atmosphere
1073:
1072:
854:Supernova remnant
644:Ultra-long period
543:on July 20, 2011.
426:on March 11, 2009
289:
288:
109:strength of 8×10
80:supernova remnant
16:(Redirected from
1103:
1063:
1062:
1053:
1052:
827:Asteroseismology
729:Fast radio burst
588:
581:
574:
565:
560:
552:. Archived from
544:
539:. Archived from
528:
527:on May 17, 2013.
494:
493:
491:
489:
474:
468:
467:
456:
450:
449:
442:
436:
435:
433:
431:
422:. Archived from
411:
398:
397:
395:
393:
374:
361:
360:
334:
332:astro-ph/0010225
314:
283:fast radio burst
150:
21:
1111:
1110:
1106:
1105:
1104:
1102:
1101:
1100:
1076:
1075:
1074:
1069:
1041:
998:
971:
965:
939:
810:
746:Gamma-ray burst
736:Bondi accretion
712:
654:
640:Anomalous X-ray
618:
597:
592:
547:
531:
518:
515:
503:
501:Further reading
498:
497:
487:
485:
476:
475:
471:
458:
457:
453:
444:
443:
439:
429:
427:
413:
412:
401:
391:
389:
376:
375:
364:
316:
315:
311:
306:
295:of 5h25m and a
293:right ascension
145:
72:gamma-ray burst
68:
28:
23:
22:
15:
12:
11:
5:
1109:
1107:
1099:
1098:
1093:
1088:
1078:
1077:
1071:
1070:
1068:
1067:
1057:
1046:
1043:
1042:
1040:
1039:
1038:
1037:
1027:
1022:
1017:
1012:
1006:
1004:
1000:
999:
997:
996:
991:
986:
981:
975:
973:
967:
966:
964:
963:
958:
953:
947:
945:
941:
940:
938:
937:
932:
927:
922:
917:
912:
911:
910:
900:
899:
898:
888:
883:
878:
873:
868:
863:
862:
861:
856:
846:
845:
844:
839:
829:
824:
818:
816:
812:
811:
809:
808:
803:
798:
793:
788:
783:
778:
773:
768:
763:
758:
756:Neutron matter
753:
748:
743:
738:
733:
732:
731:
720:
718:
714:
713:
711:
710:
705:
700:
695:
690:
689:
688:
683:
678:
668:
662:
660:
659:Binary pulsars
656:
655:
653:
652:
647:
646:
645:
642:
637:
626:
624:
623:Single pulsars
620:
619:
617:
616:
611:
605:
603:
599:
598:
593:
591:
590:
583:
576:
568:
562:
561:
545:
529:
514:
513:External links
511:
510:
509:
502:
499:
496:
495:
484:. 16 June 2009
469:
451:
437:
399:
362:
349:10.1086/317889
325:(2): 127–129.
308:
307:
305:
302:
287:
286:
279:
276:
270:
269:
266:Sagittarius A*
258:
255:
253:SGR J1745−2900
249:
248:
241:
238:
232:
231:
224:
221:
219:SGR J1550−5418
215:
214:
212:
209:
203:
202:
195:
192:
186:
185:
182:
179:
173:
172:
170:
167:
161:
160:
157:
154:
144:
141:
107:magnetic-field
67:
64:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1108:
1097:
1094:
1092:
1089:
1087:
1084:
1083:
1081:
1066:
1058:
1056:
1048:
1047:
1044:
1036:
1033:
1032:
1031:
1028:
1026:
1023:
1021:
1018:
1016:
1013:
1011:
1008:
1007:
1005:
1001:
995:
992:
990:
987:
985:
982:
980:
977:
976:
974:
972:investigation
968:
962:
959:
957:
956:Centaurus X-3
954:
952:
949:
948:
946:
942:
936:
933:
931:
928:
926:
923:
921:
920:Pulsar planet
918:
916:
913:
909:
908:Related links
906:
905:
904:
901:
897:
896:Related links
894:
893:
892:
889:
887:
884:
882:
879:
877:
874:
872:
869:
867:
864:
860:
859:Related links
857:
855:
852:
851:
850:
847:
843:
840:
838:
835:
834:
833:
830:
828:
825:
823:
820:
819:
817:
813:
807:
804:
802:
799:
797:
794:
792:
789:
787:
784:
782:
779:
777:
774:
772:
769:
767:
764:
762:
759:
757:
754:
752:
749:
747:
744:
742:
739:
737:
734:
730:
727:
726:
725:
722:
721:
719:
715:
709:
706:
704:
701:
699:
696:
694:
691:
687:
684:
682:
681:X-ray burster
679:
677:
674:
673:
672:
669:
667:
664:
663:
661:
657:
651:
648:
643:
641:
638:
636:
633:
632:
631:
628:
627:
625:
621:
615:
612:
610:
607:
606:
604:
600:
596:
589:
584:
582:
577:
575:
570:
569:
566:
559:
555:
551:
546:
542:
538:
534:
530:
526:
522:
517:
516:
512:
508:
505:
504:
500:
483:
479:
473:
470:
465:
461:
455:
452:
447:
441:
438:
425:
421:
417:
410:
408:
406:
404:
400:
388:
384:
380:
373:
371:
369:
367:
363:
358:
354:
350:
346:
342:
338:
333:
328:
324:
320:
313:
310:
303:
301:
298:
294:
284:
280:
277:
275:
274:SGR 1935+2154
272:
271:
267:
263:
259:
256:
254:
251:
250:
246:
242:
239:
237:
236:SGR 0501+4516
234:
233:
229:
225:
222:
220:
217:
216:
213:
210:
208:
205:
204:
200:
196:
193:
191:
188:
187:
183:
180:
178:
175:
174:
171:
168:
166:
163:
162:
158:
155:
152:
151:
148:
142:
140:
138:
135:
131:
127:
123:
118:
116:
112:
108:
104:
99:
94:
92:
87:
85:
81:
77:
73:
65:
63:
62:around them.
61:
57:
56:neutron stars
53:
49:
45:
41:
37:
33:
19:
832:Compact star
806:Urca process
796:Timing noise
781:Relativistic
676:X-ray binary
671:X-ray pulsar
634:
595:Neutron star
557:
554:the original
541:the original
525:the original
486:. Retrieved
472:
454:
440:
428:. Retrieved
424:the original
390:. Retrieved
382:
322:
318:
312:
290:
146:
119:
95:
88:
76:Solar System
69:
58:with fossil
40:astronomical
35:
31:
29:
891:White dwarf
876:Microquasar
842:Exotic star
771:Pulsar kick
693:Millisecond
609:Radio-quiet
488:28 December
297:declination
207:SGR 1627−41
190:SGR 1900+14
177:SGR 1806−20
165:SGR 0525−66
143:List of SGR
122:SGR 1900+14
103:SGR 1806-20
96:Astronomer
1091:Star types
1080:Categories
1020:Astropulse
935:QCD matter
915:Radio star
886:Quark-nova
837:Quark star
786:Rp-process
717:Properties
304:References
262:black hole
126:ionosphere
44:gamma-rays
970:Satellite
944:Discovery
866:Hypernova
849:Supernova
791:Starquake
464:Space.com
194:1979/1986
181:1979/1986
156:Discovery
137:satellite
1055:Category
871:Kilonova
698:Be/X-ray
630:Magnetar
430:March 2,
392:March 2,
357:14745312
228:magnetar
52:magnetar
38:) is an
1065:Commons
815:Related
766:Optical
724:Blitzar
703:Spin-up
337:Bibcode
91:photons
82:in the
66:History
751:Glitch
666:Binary
614:Pulsar
355:
159:Notes
153:Object
132:), an
113:(8×10
111:teslas
48:X-rays
1003:Other
951:LGM-1
602:Types
353:S2CID
327:arXiv
245:Swift
134:X-ray
115:gauss
60:disks
686:List
537:NRAO
490:2009
432:2009
420:NASA
394:2009
278:2014
257:2013
240:2008
223:2008
211:1998
169:1979
130:RXTE
46:and
345:doi
323:545
264:in
36:SGR
1082::
535:.
480:.
462:.
418:.
402:^
385:.
381:.
365:^
351:.
343:.
335:.
321:.
268:.
230:.
201:.
86:.
30:A
587:e
580:t
573:v
492:.
448:.
434:.
396:.
359:.
347::
339::
329::
34:(
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.