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- Soft_gamma_repeater abstract "A soft gamma repeater (SGR) is an astronomical object which emits large bursts of gamma-rays and X-rays at irregular intervals. It is conjectured that they are a type of magnetar or, alternatively, neutron stars with fossil disks around them.On March 5, 1979 a powerful gamma-ray burst was noted. As a number of receivers at different locations in the Solar System saw the burst at slightly different times, its direction could be determined, and it was shown to originate from near a supernova remnant in the Large Magellanic Cloud.Over time it became clear that this was not a normal gamma-ray burst. The photons were less energetic in the soft gamma-ray and hard X-ray range, and repeated bursts came from the same region.Astronomer Chryssa Kouveliotou of the Universities Space Research Association (USRA) at NASA's Marshall Space Flight Center decided to test the theory that soft gamma repeaters were magnetars. According to the theory, the bursts would cause the object to slow down its rotation. In 1998, she made careful comparisons of the periodicity of soft gamma repeater SGR 1806-20. The period had increased by 0.008 seconds since 1993, and she calculated that this would be explained by a magnetar with a magnetic-field strength of 8×1010 teslas (8×1014 gauss). This was enough to convince the international astronomical community that soft gamma repeaters are indeed magnetars.An unusually spectacular soft gamma repeater burst was SGR 1900+14 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 ionosphere, 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 (RXTE), an X-ray satellite, 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.Known soft gamma repeaters include:The numbers give the position in the sky, for example, SGR 0525-66 has a right ascension of 5h25m and a declination of −66°. The date of discovery sometimes appears in a format such as 1979/1986 to refer to the year the object was discovered, and the year soft gamma repeaters were recognized as a separate class of objects rather than "normal" gamma-ray bursts.".
- Soft_gamma_repeater wikiPageExternalLink magnetar.html.
- Soft_gamma_repeater wikiPageExternalLink 9612091.
- Soft_gamma_repeater wikiPageExternalLink background.
- Soft_gamma_repeater wikiPageExternalLink All_magnetars.htm.
- Soft_gamma_repeater wikiPageID "118575".
- Soft_gamma_repeater wikiPageLength "5472".
- Soft_gamma_repeater wikiPageOutDegree "39".
- Soft_gamma_repeater wikiPageRevisionID "682886767".
- Soft_gamma_repeater wikiPageWikiLink Astronomy.
- Soft_gamma_repeater wikiPageWikiLink Black_hole.
- Soft_gamma_repeater wikiPageWikiLink Category:Astronomical_events.
- Soft_gamma_repeater wikiPageWikiLink Category:Gamma-ray_bursts.
- Soft_gamma_repeater wikiPageWikiLink Category:Magnetars.
- Soft_gamma_repeater wikiPageWikiLink Category:Pulsars.
- Soft_gamma_repeater wikiPageWikiLink Category:Soft_gamma_repeaters.
- Soft_gamma_repeater wikiPageWikiLink Category:Star_types.
- Soft_gamma_repeater wikiPageWikiLink Chryssa_Kouveliotou.
- Soft_gamma_repeater wikiPageWikiLink Declination.
- Soft_gamma_repeater wikiPageWikiLink Gamma-ray.
- Soft_gamma_repeater wikiPageWikiLink Gamma-ray_burst.
- Soft_gamma_repeater wikiPageWikiLink Gamma_ray.
- Soft_gamma_repeater wikiPageWikiLink Gauss_(unit).
- Soft_gamma_repeater wikiPageWikiLink Ionosphere.
- Soft_gamma_repeater wikiPageWikiLink Large_Magellanic_Cloud.
- Soft_gamma_repeater wikiPageWikiLink Magnetar.
- Soft_gamma_repeater wikiPageWikiLink Magnetic_field.
- Soft_gamma_repeater wikiPageWikiLink Neutron_star.
- Soft_gamma_repeater wikiPageWikiLink PSR_J1745-2900.
- Soft_gamma_repeater wikiPageWikiLink Photon.
- Soft_gamma_repeater wikiPageWikiLink RXTE.
- Soft_gamma_repeater wikiPageWikiLink Right_ascension.
- Soft_gamma_repeater wikiPageWikiLink Rossi_X-ray_Timing_Explorer.
- Soft_gamma_repeater wikiPageWikiLink SGR_0501+4516.
- Soft_gamma_repeater wikiPageWikiLink SGR_0525-66.
- Soft_gamma_repeater wikiPageWikiLink SGR_1627-41.
- Soft_gamma_repeater wikiPageWikiLink SGR_1806-20.
- Soft_gamma_repeater wikiPageWikiLink SGR_1900+14.
- Soft_gamma_repeater wikiPageWikiLink SGR_J1550-5418.
- Soft_gamma_repeater wikiPageWikiLink SGR_J1745-2900.
- Soft_gamma_repeater wikiPageWikiLink Sagittarius_A*.
- Soft_gamma_repeater wikiPageWikiLink Satellite.
- Soft_gamma_repeater wikiPageWikiLink Solar_System.
- Soft_gamma_repeater wikiPageWikiLink Supernova_remnant.
- Soft_gamma_repeater wikiPageWikiLink Swift_Gamma-Ray_Burst_Mission.
- Soft_gamma_repeater wikiPageWikiLink Tesla_(unit).
- Soft_gamma_repeater wikiPageWikiLink X-ray.
- Soft_gamma_repeater wikiPageWikiLink X-ray_astronomy.
- Soft_gamma_repeater wikiPageWikiLinkText "SGR".
- Soft_gamma_repeater wikiPageWikiLinkText "Soft Gamma Repeaters".
- Soft_gamma_repeater wikiPageWikiLinkText "Soft Gamma-Ray Repeater".
- Soft_gamma_repeater wikiPageWikiLinkText "Soft gamma repeater".
- Soft_gamma_repeater wikiPageWikiLinkText "soft gamma ray repeaters".
- Soft_gamma_repeater wikiPageWikiLinkText "soft gamma repeater".
- Soft_gamma_repeater wikiPageWikiLinkText "soft gamma-ray repeater".
- Soft_gamma_repeater wikiPageWikiLinkText "soft gamma-ray repeaters".
- Soft_gamma_repeater hasPhotoCollection Soft_gamma_repeater.
- Soft_gamma_repeater wikiPageUsesTemplate Template:Cite_web.
- Soft_gamma_repeater wikiPageUsesTemplate Template:Neutron_star.
- Soft_gamma_repeater wikiPageUsesTemplate Template:Reflist.
- Soft_gamma_repeater subject Category:Astronomical_events.
- Soft_gamma_repeater subject Category:Gamma-ray_bursts.
- Soft_gamma_repeater subject Category:Magnetars.
- Soft_gamma_repeater subject Category:Pulsars.
- Soft_gamma_repeater subject Category:Soft_gamma_repeaters.
- Soft_gamma_repeater subject Category:Star_types.
- Soft_gamma_repeater type Event.
- Soft_gamma_repeater type Burst.
- Soft_gamma_repeater type Event.
- Soft_gamma_repeater type Magnetar.
- Soft_gamma_repeater comment "A soft gamma repeater (SGR) is an astronomical object which emits large bursts of gamma-rays and X-rays at irregular intervals. It is conjectured that they are a type of magnetar or, alternatively, neutron stars with fossil disks around them.On March 5, 1979 a powerful gamma-ray burst was noted.".
- Soft_gamma_repeater label "Soft gamma repeater".
- Soft_gamma_repeater sameAs مردد_جاما_ضعيفة.
- Soft_gamma_repeater sameAs Крыніца_мяккіх_паўторных_гама-ўсплёскаў.
- Soft_gamma_repeater sameAs Flamarada_de_raigs_gamma_suaus.
- Soft_gamma_repeater sameAs SGR.
- Soft_gamma_repeater sameAs Soft_Gamma_Repeater.
- Soft_gamma_repeater sameAs Sursauteur_gamma_mou.
- Soft_gamma_repeater sameAs 軟ガンマ線リピーター.
- Soft_gamma_repeater sameAs 연감마선_연속_방출원.
- Soft_gamma_repeater sameAs Soft_gamma_repeater.
- Soft_gamma_repeater sameAs Powtarzalne_źródła_miękkich_promieni_gamma.
- Soft_gamma_repeater sameAs m.0vjrv.
- Soft_gamma_repeater sameAs Источник_мягких_повторяющихся_гамма-всплесков.
- Soft_gamma_repeater sameAs Q2511333.
- Soft_gamma_repeater sameAs Q2511333.
- Soft_gamma_repeater wasDerivedFrom Soft_gamma_repeater?oldid=682886767.
- Soft_gamma_repeater isPrimaryTopicOf Soft_gamma_repeater.