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      ], "broader" : [{"_about" : "http://astrothesaurus.org/uat/1822", "narrower" : ["http://astrothesaurus.org/uat/1852"]}
      , {"_about" : "http://astrothesaurus.org/uat/1851", "narrower" : ["http://astrothesaurus.org/uat/1852"]}
      ], "contributor" : "http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie_Admin", "creator" : "http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie", "dctermsCreated" : "Mon, 20 Mar 2017 21:13:51 GMT+0000", "dctermsModified" : "Wed, 04 Nov 2020 21:03:21 GMT+0000", "definition" : "An X-ray source that enhances its emission well above its usual level for a period typically longer than a week. Recurrences can be periodic or aperiodic, but there is no obvious correlation between recurrence time and the luminosity amplitude of the outburst. X-ray transients seem to be divided into two classes: those associated with high-mass X-ray binary (HMXB) stars and those associated with low-mass X-ray binary (LMXB) stars. The HMXBs contain a neutron star or black hole paired with a massive star. Often, the stellar companion is a Be star, Be star, which sometimes sheds material from its equatorial region. In these systems, the transient event is characterized by having more higher energy X-rays in the spectrum. The LMXBs contain a neutron star or black hole orbiting around a cooler, low-mass star. These transient events often generate more lower-energy X-rays.", "narrower" : [{"_about" : "http://astrothesaurus.org/uat/1813", "broader" : ["http://astrothesaurus.org/uat/1852"]}
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