About: GRB 971214

An Entity of Type: star, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

GRB 971214 (1SAX J1156.4+6513) is a gamma-ray burst observed in 1997. It originated 12 billion light years away. For a brief period this was thought by some researchers to have been the most energetic event observed in the universe, but this was before it was established that gamma-ray bursts are beamed towards the Earth. Thus, at the time of the discovery it was hypothesized by G. Djorgovski and his collaborators that the outburst put out more energy than several hundred typical supernovae, or the energy our galaxy puts out over a couple of centuries. However, a couple of years later it was realized that this was an upper limit as it is likely that the burst was directed towards Earth. If the jet had an opening angle of only a few degrees, the burst energy could have been thousands of tim

Property Value
dbo:abstract
  • انفجار أشعة غاما في علم الفلك (بالإنجليزية: GRB 971214 أو (1SAX J1156.4+6513))هو انفجار لأحد النجوم صدر عنه أشعة غاما وشوهد هذا الحدث عام 1997م. التسمية GRB 971214 هي اختصار ل Gamma-Ray Burst ولتاريخ مشاهدة الانفجار في 14/12/97. قُدِّر بُعد هذا الانفجار عن الأرض بنحو 12 مليار سنة ضوئية. اعتقد بعض العلماء للوهلة الأولى أن هذا الحدث هو أشد تلك الأحداث الكونية، ولكن المشاهدات التي أجريت بعد ذلك أثبتت غير ذلك. ففي عام 1998م، اعتقد العالم جورج دجورجوفسكي أن هذا الانفجار أطلق طاقة مهولة تُعادل شدتها الطاقة الناتجة من عدة مئات من مستعرات عظمى، أو ما تنتجه مجرتنا عبر مئات السنين. ولكن تحقق بعد ذلك بأن مشاهدة (رصد) تلك الطاقة الهائلة سببه أن الطاقة الخارجة من النجم عند الانفجار كانت مُسددة (مُصوبة) بإتجاه مجموعتنا الشمسية، ولم تنطلق موزعة بنفس الشدة من النجم في جميع الإتجاهات. إذا كانت طاقة الانفجار قد إنطلقت في صور نفاث ذو فتحة تقدر بعدة درجات زاويّة فقط لكانت الطاقة الصادرة من النجم أقل بآلاف المرات. وقد رُصد من الأشعة السينية ومن المجرة المُضيفة للنجم المنفجر بواسطة مرصد بيبوساكس BeppoSAX وكذلك مرصد كيك وتبين أن إنزياحهما الأحمر يُقدَّر ب z=3.4. (ar)
  • GRB 971214 (1SAX J1156.4+6513) is a gamma-ray burst observed in 1997. It originated 12 billion light years away. For a brief period this was thought by some researchers to have been the most energetic event observed in the universe, but this was before it was established that gamma-ray bursts are beamed towards the Earth. Thus, at the time of the discovery it was hypothesized by G. Djorgovski and his collaborators that the outburst put out more energy than several hundred typical supernovae, or the energy our galaxy puts out over a couple of centuries. However, a couple of years later it was realized that this was an upper limit as it is likely that the burst was directed towards Earth. If the jet had an opening angle of only a few degrees, the burst energy could have been thousands of times lower. The X-ray afterglow and the host galaxy of the GRB have also been observed, using BeppoSAX and Keck II respectively. The host galaxy lies at redshift z=3.4. Since the beaming phenomenon was not yet established at the time of the discovery, the media responded by giving GRB 971214 the nickname Big Bang 2. (en)
  • GRB 971214는 1997년 관측된 감마선 폭발이다. (ko)
dbo:wikiPageExternalLink
dbo:wikiPageID
  • 2710787 (xsd:integer)
dbo:wikiPageLength
  • 2772 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID
  • 1084680117 (xsd:integer)
dbo:wikiPageWikiLink
dbp:title
dbp:wikiPageUsesTemplate
dbp:years
  • 1997 (xsd:integer)
dcterms:subject
gold:hypernym
rdf:type
rdfs:comment
  • GRB 971214는 1997년 관측된 감마선 폭발이다. (ko)
  • انفجار أشعة غاما في علم الفلك (بالإنجليزية: GRB 971214 أو (1SAX J1156.4+6513))هو انفجار لأحد النجوم صدر عنه أشعة غاما وشوهد هذا الحدث عام 1997م. التسمية GRB 971214 هي اختصار ل Gamma-Ray Burst ولتاريخ مشاهدة الانفجار في 14/12/97. قُدِّر بُعد هذا الانفجار عن الأرض بنحو 12 مليار سنة ضوئية. إذا كانت طاقة الانفجار قد إنطلقت في صور نفاث ذو فتحة تقدر بعدة درجات زاويّة فقط لكانت الطاقة الصادرة من النجم أقل بآلاف المرات. وقد رُصد من الأشعة السينية ومن المجرة المُضيفة للنجم المنفجر بواسطة مرصد بيبوساكس BeppoSAX وكذلك مرصد كيك وتبين أن إنزياحهما الأحمر يُقدَّر ب z=3.4. (ar)
  • GRB 971214 (1SAX J1156.4+6513) is a gamma-ray burst observed in 1997. It originated 12 billion light years away. For a brief period this was thought by some researchers to have been the most energetic event observed in the universe, but this was before it was established that gamma-ray bursts are beamed towards the Earth. Thus, at the time of the discovery it was hypothesized by G. Djorgovski and his collaborators that the outburst put out more energy than several hundred typical supernovae, or the energy our galaxy puts out over a couple of centuries. However, a couple of years later it was realized that this was an upper limit as it is likely that the burst was directed towards Earth. If the jet had an opening angle of only a few degrees, the burst energy could have been thousands of tim (en)
rdfs:label
  • انفجار أشعة غاما 971214 (ar)
  • GRB 971214 (en)
  • GRB 971214 (ko)
owl:sameAs
prov:wasDerivedFrom
foaf:isPrimaryTopicOf
is dbo:wikiPageRedirects of
is dbo:wikiPageWikiLink of
is foaf:primaryTopic of
Powered by OpenLink Virtuoso    This material is Open Knowledge     W3C Semantic Web Technology     This material is Open Knowledge    Valid XHTML + RDFa
This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License