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{{Short description|American astronomer}}
{{nofootnotes|date=November 2010}}
{{nofootnotes|date=November 2010}}
{{Infobox scientist
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'''William H. (Bill) Jefferys''' (born 1940) is an [[United States|American]] [[astronomer]]. He is a Harlan J. Smith Centennial Professor of Astronomy (Emeritus) of [[astronomy]] at [[University of Texas at Austin|The University of Texas at Austin]], and an [[adjunct professor]] of [[statistics]] at the [[University of Vermont]].
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| name = William H. Jefferys
| image = <!--(filename only, i.e. without "File:" prefix)-->
| image_size =
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| birth_date = <!--{{birth date |YYYY|MM|DD}}-->
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| death_date = <!--{{death date and age |YYYY|MM|DD |YYYY|MM|DD}} (death date then birth date)-->
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| nationality = [[United States|American]]
| fields = [[Astronomy]]
| workplaces = [[University of Texas at Austin]]
| alma_mater = [[Yale University]]
| thesis_title = Some Dynamical Systems of Two Degrees of Freedom in Celestial Mechanics
| thesis_url = https://search.library.yale.edu/catalog/14714477
| thesis_year = 1965
| doctoral_advisor = {{ill|Gen'ichirō Hori|jp|堀源一郎}}
| doctoral_students =
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| awards =
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}}
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'''William Hamilton Jefferys III''' (born 1940) is an American [[astronomer]]. He is a Harlan J. Smith Centennial Professor of Astronomy (Emeritus) of astronomy at [[University of Texas at Austin|The University of Texas at Austin]], and an [[adjunct professor]] of [[statistics]] at the [[University of Vermont]].


Jefferys specialized in [[astrometry]], [[celestial mechanics]] and [[astrophysics]], including the [[kinematics]] and [[dynamics (mechanics)|dynamics]] of astronomical bodies. He has also worked in the field of [[Bayesian statistics]], particularly with astronomical applications.
Jefferys specialized in [[astrometry]], [[celestial mechanics]], and [[astrophysics]], including the [[kinematics]] and [[dynamics (mechanics)|dynamics]] of astronomical bodies. He has also worked in the field of [[Bayesian statistics]], particularly with astronomical applications. He was the [[Hubble Space Telescope]] Astrometry Science Team leader, and participated in the project that repaired the Hubble Space Telescope after the discovery of its initial [[optic]]al defect.


⚫
Jefferys served as chairman of The University of Texas Department of Astronomy from 1994 to 1998. He retired from the University of Texas in 2004 and moved to Vermont in 2005, where he accepted an appointment as adjunct professor of statistics at the University of Vermont.
Jefferys was the [[Hubble Space Telescope]] Astrometry Science Team leader, and participated in the project that repaired the Hubble Space Telescope after the discovery of its initial [[optic]]al defect.

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Jefferys served as chairman of The University of Texas Department of Astronomy from 1994 to 1998. He retired from the University of Texas in 2004 and moved to Vermont in 2005, where he accepted an appointment as [[adjunct professor]] of [[statistics]] at the [[University of Vermont]].


==External links==
==External links==
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*[http://adsabs.harvard.edu/cgi-bin/nph-abs_connect?sim_query=YES&ned_query=YES&aut_xct=NO&aut_logic=OR&obj_logic=OR&author=Jefferys%2C+W&object=&start_mon=&start_year=1962&end_mon=&end_year=&ttl_logic=OR&title=&txt_logic=OR&text=&nr_to_return=150&start_nr=1&query_type=PAPERS&select_nr=50&select_start=1&start_entry_day=&start_entry_mon=&start_entry_year=&min_score=&jou_pick=ALL&ref_stems=&data_and=ALL&group_and=ALL&sort=SCORE&aut_wt=1.0&obj_wt=1.0&ttl_wt=0.3&txt_wt=3.0&ttl_syn=YES&txt_syn=YES&aut_wgt=YES&obj_wgt=YES&ttl_wgt=YES&txt_wgt=YES&ttl_sco=YES&txt_sco=YES&db_key=AST&version=1 Jefferys' publications] (a partial list from [[NASA]] [[Astrophysics Data System]]). This does not include publications on statistics, some of which can be retrieved [http://quasar.as.utexas.edu/Papers.html here].
*[http://adsabs.harvard.edu/cgi-bin/nph-abs_connect?sim_query=YES&ned_query=YES&aut_xct=NO&aut_logic=OR&obj_logic=OR&author=Jefferys%2C+W&object=&start_mon=&start_year=1962&end_mon=&end_year=&ttl_logic=OR&title=&txt_logic=OR&text=&nr_to_return=150&start_nr=1&query_type=PAPERS&select_nr=50&select_start=1&start_entry_day=&start_entry_mon=&start_entry_year=&min_score=&jou_pick=ALL&ref_stems=&data_and=ALL&group_and=ALL&sort=SCORE&aut_wt=1.0&obj_wt=1.0&ttl_wt=0.3&txt_wt=3.0&ttl_syn=YES&txt_syn=YES&aut_wgt=YES&obj_wgt=YES&ttl_wgt=YES&txt_wgt=YES&ttl_sco=YES&txt_sco=YES&db_key=AST&version=1 Jefferys' publications] (a partial list from [[NASA]] [[Astrophysics Data System]]). This does not include publications on statistics, some of which can be retrieved [http://quasar.as.utexas.edu/Papers.html here].


{{Authority control}}
{{Persondata <!-- Metadata: see [[Wikipedia:Persondata]]. -->
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| NAME = Jefferys, William H.
| ALTERNATIVE NAMES =
| SHORT DESCRIPTION = American astronomer
| DATE OF BIRTH = 1940
| PLACE OF BIRTH =
| DATE OF DEATH =
| PLACE OF DEATH =
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}}
{{DEFAULTSORT:Jefferys, William H.}}
{{DEFAULTSORT:Jefferys, William H.}}
[[Category:American astronomers]]
[[Category:American astronomers]]
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[[Category:Living people]]
[[Category:Living people]]
[[Category:American statisticians]]
[[Category:American statisticians]]
[[Category:University of Vermont faculty]]
[[Category:Yale University alumni]]




Latest revision as of 22:36, 12 October 2023

William H. Jefferys
NationalityAmerican
Alma materYale University
Scientific career
FieldsAstronomy
InstitutionsUniversity of Texas at Austin
ThesisSome Dynamical Systems of Two Degrees of Freedom in Celestial Mechanics (1965)
Doctoral advisorGen'ichirō Hori [jp]

William Hamilton Jefferys III (born 1940) is an American astronomer. He is a Harlan J. Smith Centennial Professor of Astronomy (Emeritus) of astronomy at The University of Texas at Austin, and an adjunct professor of statistics at the University of Vermont.

Jefferys specialized in astrometry, celestial mechanics, and astrophysics, including the kinematics and dynamics of astronomical bodies. He has also worked in the field of Bayesian statistics, particularly with astronomical applications. He was the Hubble Space Telescope Astrometry Science Team leader, and participated in the project that repaired the Hubble Space Telescope after the discovery of its initial optical defect.

Jefferys served as chairman of The University of Texas Department of Astronomy from 1994 to 1998. He retired from the University of Texas in 2004 and moved to Vermont in 2005, where he accepted an appointment as adjunct professor of statistics at the University of Vermont.

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