Noyola, Eva; Gebhardt, Karl; Bergmann, Marcel (2008). «Gemini and Hubble Space Telescope Evidence for an Intermediate Mass Black Hole in omega Centauri». The Astrophysical Journal. 676 (2): 1008. arXiv:0801.2782. Bibcode:2008ApJ...676.1008N. doi:10.1086/529002.
D'Souza, Richard; Rix, Hans-Walter (2013 թ․ մարտ), «Mass estimates from stellar proper motions: the mass of ω Centauri», Monthly Notices of the Royal Astronomical Society, 429 (3): 1887–1901, arXiv:1211.4399, Bibcode:2013MNRAS.429.1887D, doi:10.1093/mnras/sts426.
Noyola, E.; Gebhardt, K.; Bergmann, M. (2008 թ․ ապրիլ). «Gemini and Hubble Space Telescope Evidence for an Intermediate-Mass Black Hole in ω Centauri». The Astrophysical Journal. 676 (2): 1008–1015. arXiv:0801.2782. Bibcode:2008ApJ...676.1008N. doi:10.1086/529002.
de la Caille (1755). «Sur les étoiles nébuleuses du ciel austral» [On the nebulous stars of the southern sky]. Histoire de l'Académie Royale des Sciences, avec les Mémoires de Mathématique & de Physique (ֆրանսերեն): 194–199. ; see in the table on p. 196: "Nébuleuse du Centaure ... " Note: The catalog number "L I.5" designates: that the nebula is listed in Lacaille's catalog of 1755 (hence the "L"); that Omega Centauri is a nebula of the "first type" (première espèce, namely, nebulae that do not seem to be accompanied by stars when viewed via a telescope that is 2 feet long; hence the Roman numeral "I"); and that Omega Centauri is listed fifth among the nebulae of the first type (hence the "5"). See: Deep Sky Observer's Companion – the online database
Frommert, Hartmut; Kronberg, Christine (1998 թ․ մարտի 22), «NGC 5139», The Munich Astro Archive, Արխիվացված է օրիգինալից 2020 թ․ հունիսի 28-ին, Վերցված է 2013 թ․ օգոստոսի 13-ին.
de la Caille (1755). «Sur les étoiles nébuleuses du ciel austral» [On the nebulous stars of the southern sky]. Histoire de l'Académie Royale des Sciences, avec les Mémoires de Mathématique & de Physique (ֆրանսերեն): 194–199. ; see in the table on p. 196: "Nébuleuse du Centaure ... " Note: The catalog number "L I.5" designates: that the nebula is listed in Lacaille's catalog of 1755 (hence the "L"); that Omega Centauri is a nebula of the "first type" (première espèce, namely, nebulae that do not seem to be accompanied by stars when viewed via a telescope that is 2 feet long; hence the Roman numeral "I"); and that Omega Centauri is listed fifth among the nebulae of the first type (hence the "5"). See: Deep Sky Observer's Companion – the online database
doi.org
Noyola, Eva; Gebhardt, Karl; Bergmann, Marcel (2008). «Gemini and Hubble Space Telescope Evidence for an Intermediate Mass Black Hole in omega Centauri». The Astrophysical Journal. 676 (2): 1008. arXiv:0801.2782. Bibcode:2008ApJ...676.1008N. doi:10.1086/529002.
D'Souza, Richard; Rix, Hans-Walter (2013 թ․ մարտ), «Mass estimates from stellar proper motions: the mass of ω Centauri», Monthly Notices of the Royal Astronomical Society, 429 (3): 1887–1901, arXiv:1211.4399, Bibcode:2013MNRAS.429.1887D, doi:10.1093/mnras/sts426.
Noyola, E.; Gebhardt, K.; Bergmann, M. (2008 թ․ ապրիլ). «Gemini and Hubble Space Telescope Evidence for an Intermediate-Mass Black Hole in ω Centauri». The Astrophysical Journal. 676 (2): 1008–1015. arXiv:0801.2782. Bibcode:2008ApJ...676.1008N. doi:10.1086/529002.
Noyola, Eva; Gebhardt, Karl; Bergmann, Marcel (2008). «Gemini and Hubble Space Telescope Evidence for an Intermediate Mass Black Hole in omega Centauri». The Astrophysical Journal. 676 (2): 1008. arXiv:0801.2782. Bibcode:2008ApJ...676.1008N. doi:10.1086/529002.
D'Souza, Richard; Rix, Hans-Walter (2013 թ․ մարտ), «Mass estimates from stellar proper motions: the mass of ω Centauri», Monthly Notices of the Royal Astronomical Society, 429 (3): 1887–1901, arXiv:1211.4399, Bibcode:2013MNRAS.429.1887D, doi:10.1093/mnras/sts426.
Noyola, E.; Gebhardt, K.; Bergmann, M. (2008 թ․ ապրիլ). «Gemini and Hubble Space Telescope Evidence for an Intermediate-Mass Black Hole in ω Centauri». The Astrophysical Journal. 676 (2): 1008–1015. arXiv:0801.2782. Bibcode:2008ApJ...676.1008N. doi:10.1086/529002.
Hughes, J. D.; Wallerstein, G. (1998 թ․ դեկտեմբեր), «Age and Metallicity Effects in Omega Centauri I: Stromgren Photometry», Bulletin of the American Astronomical Society, 30: 1348, Bibcode:1998AAS...193.6809H.
Cheseaux compiled a list of nebulae during 1745–1746. He sent the list to his grandfather, in the form of a letter. The letter was read before the French Academy of Sciences in 1746. However, it was first published only in 1892 as part of a large article by the French astronomer Guillaume Bigourdan.
Bigourdan, G. (1892). «Observations de nébuleuses et d'amas stellaires» [Observations of nebulae and of stellar clusters]. Annales de l'Observatoire de Paris. Observations. 1884. (ֆրանսերեն): G-1–G-103.
Bayer, Johann (1603). Uranometria (լատիներեն). Augsburg, [Germany]: Christoph Mang. Available at: Linda Hall Library (University of Missouri (Kansas City, Missouri, US))Արխիվացված 2018-07-24 Wayback Machine The pages of this book are not numbered. However, towards the end of the book there appears "Tabula quadragesima prima, Centaurus." (Forty-first table, Centaur). The table lists Omega Centauri as "21 ω In imo dorso" (21 ω At the bottom of the back). The following page shows the constellation Centaur and Omega Centauri as a star labelled ω at the base of the Centaur's back.
Bayer, Johann (1603). Uranometria (լատիներեն). Augsburg, [Germany]: Christoph Mang. Available at: Linda Hall Library (University of Missouri (Kansas City, Missouri, US))Արխիվացված 2018-07-24 Wayback Machine The pages of this book are not numbered. However, towards the end of the book there appears "Tabula quadragesima prima, Centaurus." (Forty-first table, Centaur). The table lists Omega Centauri as "21 ω In imo dorso" (21 ω At the bottom of the back). The following page shows the constellation Centaur and Omega Centauri as a star labelled ω at the base of the Centaur's back.
Frommert, Hartmut; Kronberg, Christine (1998 թ․ մարտի 22), «NGC 5139», The Munich Astro Archive, Արխիվացված է օրիգինալից 2020 թ․ հունիսի 28-ին, Վերցված է 2013 թ․ օգոստոսի 13-ին.
