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{{Short description|American astronomer}}
'''William H. (Bill) Jefferys''' (born 1940) is an [[United States|American]] [[astronomer]]. He is a [[professor 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]].
{{nofootnotes|date=November 2010}}
{{Infobox scientist
| name = William H. Jefferys
| image = <!--(filename only, i.e. without "File:" prefix)-->
| image_size =
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| alt =
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| birth_date = <!--{{birth date |YYYY|MM|DD}}-->
| birth_place =
| death_date = <!--{{death date and age |YYYY|MM|DD |YYYY|MM|DD}} (death date then birth date)-->
| death_place =
| 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 =
| known_for =
| awards =
}}
'''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|optical]] defect.


==External links==
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]].
*[http://quasar.as.utexas.edu/ Bill Jefferys homepage]
*[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}}
{{dablink|See [[Harold Jeffreys]], a mathematician, statistician, geophysicist, and astronomer.}}
{{DEFAULTSORT:Jefferys, William H.}}

[[Category:American astronomers]]
==External link==
[[Category:University of Texas at Austin faculty]]
*[http://quasar.as.utexas.edu/ Bill Jefferys homepage]
[[Category:1940 births]]
[[Category:Living people]]
[[Category:American statisticians]]
[[Category:University of Vermont faculty]]
[[Category:Yale University alumni]]


[[Category:American astronomers|Jefferys, William H.]]
[[Category:University of Texas at Austin faculty|Jefferys, William H.]]
[[Category:1940 births|Jefferys, William H.]]
[[Category:Living people|Jefferys, William H.]]


{{US-scientist-stub}}
{{US-astronomer-stub}}
{{astronomer-stub}}
{{US-statistician-stub}}

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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