Exosat observations of the ring nebula NGC 6888 and HD 192163
A 25-hr exposure of the ring nebula NGC 6888 was obtained with the Exosat X-ray observatory. X-ray emission of the nebula was not found. Taking all instrumental effects and the large nebular area into account, a conservative upper limit of 1 x 10 to the -12th erg/s per sq cm is derived. This is abou...
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| Veröffentlicht in: | Astrophysics and space science 1987-07, Vol.135 (1), p.105-109 |
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| container_title | Astrophysics and space science |
| container_volume | 135 |
| creator | KÄHLER, H ULE, T WENDKER, H. J |
| description | A 25-hr exposure of the ring nebula NGC 6888 was obtained with the Exosat X-ray observatory. X-ray emission of the nebula was not found. Taking all instrumental effects and the large nebular area into account, a conservative upper limit of 1 x 10 to the -12th erg/s per sq cm is derived. This is about an order of magnitude less than predicted from braking the stellar wind of the central star HD 192163. Two point sources were serendipitously found in the field, HD 192163 and HD 192020. (Author) |
| doi_str_mv | 10.1007/BF00644465 |
| format | Article |
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The universe</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KÄHLER, H</creatorcontrib><creatorcontrib>ULE, T</creatorcontrib><creatorcontrib>WENDKER, H. J</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astrophysics and space science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KÄHLER, H</au><au>ULE, T</au><au>WENDKER, H. 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| ispartof | Astrophysics and space science, 1987-07, Vol.135 (1), p.105-109 |
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| language | eng |
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| source | SpringerLink Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Astronomy Earth, ocean, space Exact sciences and technology Quasars. Active or peculiar galaxies, objects, and systems Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | Exosat observations of the ring nebula NGC 6888 and HD 192163 |
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