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Orphaned references in X-ray astronomy history

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I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of X-ray astronomy history's orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.

Reference named "Gudel":

  • From X-ray astronomy: Güdel M (2004). "X-ray astronomy of stellar coronae" (PDF). Astron Astrophys Rev. 12: 71. doi:10.1007/s00159-004-0023-2.
  • From Stellar X-ray astronomy: Güdel M (2004). "X-ray astronomy of stellar coronae" (PDF). Astron Astrophys Rev. 12: 71–237. doi:10.1007/s00159-004-0023-2.

I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT⚡ 05:34, 18 November 2009 (UTC)[reply]

References fixed in both articles. Marshallsumter (talk) 05:51, 19 November 2009 (UTC)[reply]

Off topic

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The content below appears to be off topic so I moving it here for now:

Section title: Detecting X-ray sources

As of 2000, there were about 220,000 known X-ray sources, with the vast majority discovered by the ROSAT X-ray satellite observatory.[1]

Known X-ray sources[1]
Year No. X-ray Sources known Based on
1960 0 (or 1 if the Sun is counted)
1962 1 Rocket experiments
1965 10 Rocket experiments
1970 60 Rocket & balloon experiments
1974 160 3rd Uhuru Catalog
1980 680 Amnuel et al. (1982) Catalog
1984 840 HEAO A-1 Catalog
1990 8,000 Einstein & EXOSAT source catalogs
2000 220,000 ROSAT source catalogs
2007 550,000 above + XMM-Newton & Chandra serendipity sources

References

  1. ^ a b Drake SA. "How Many Known X-Ray (and Other) Sources Are There?".
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I have just modified one external link on History of X-ray astronomy. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

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