The Félix Aguilar and Yale Southern Observatories A Historical Travelogue Carlos E. López Félix Aguilar Observatory and Yale Southern Observatory San Juan,

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Presentation transcript:

The Félix Aguilar and Yale Southern Observatories A Historical Travelogue Carlos E. López Félix Aguilar Observatory and Yale Southern Observatory San Juan, Argentina

Historical Background. 1718: Halley announces the proper motion of the stars. 1718: Halley announces the proper motion of the stars. 1775: Mayer publishes the first proper motions catalogue. 1775: Mayer publishes the first proper motions catalogue. 1783: Herschel suggests the idea of solar motion. 1783: Herschel suggests the idea of solar motion. 1887: the Astrographic Catalogue is started. 1887: the Astrographic Catalogue is started. 1916: Barnard discovers his famous star. 1916: Barnard discovers his famous star. 1926: Schlesinger starts the Yale Zones. 1926: Schlesinger starts the Yale Zones. 1947: Wright starts the NPM. 1947: Wright starts the NPM. 1950: Luyten starts to survey both hemispheres for high proper motion stars. 1950: Luyten starts to survey both hemispheres for high proper motion stars.

Historical Background (cont’d) 1952: the IAU suggests to extend the NPM to the south. 1952: the IAU suggests to extend the NPM to the south. 1953: the Yale – Columbia association is established. 1953: the Yale – Columbia association is established. 1953: dedication of the Félix Aguilar Observatory. 1953: dedication of the Félix Aguilar Observatory. 1960: Giclas starts his survey. 1960: Giclas starts his survey. 1965: March 31st dedication of the Yale – Columbia Southern Observatory (YCSO). The SPM is started. 1965: March 31st dedication of the Yale – Columbia Southern Observatory (YCSO). The SPM is started. 1968: the USNO starts the operation of a Meridian Circle at the YCSO. 1968: the USNO starts the operation of a Meridian Circle at the YCSO. 1973: Columbia University abandoned the project. 1973: Columbia University abandoned the project.

Historical Background (cont’d) 1974: San Juan University is invited to take part in the SPM program. 1974: San Juan University is invited to take part in the SPM program. 1974: Bill van Altena joins the Yale Astronomy Department. 1974: Bill van Altena joins the Yale Astronomy Department. 1974: the USNO finishes the observations and the Meridian Circle returns to the US. 1974: the USNO finishes the observations and the Meridian Circle returns to the US. 1974: the first epoch of the SPM is officially finished. 1974: the first epoch of the SPM is officially finished. 1987: Carlos U. Cesco passed away. 1987: Carlos U. Cesco passed away. 1987: the second epoch of the SPM is started. 1987: the second epoch of the SPM is started. 1989: ESA launches the Hipparcos satellite. 1989: ESA launches the Hipparcos satellite. 1990: NASA launches the HST. 1990: NASA launches the HST.

1995: the fourth edition of the Yale Trigonometric Parallaxes Catalogue is published. 1995: the fourth edition of the Yale Trigonometric Parallaxes Catalogue is published. 1998: the SPM 1 is published. 1998: the SPM 1 is published. 2000: Monet announces the USNO B. 2000: Monet announces the USNO B. 2000: the Double Astrograph photographic plates are replaced by new CCDs. 2000: the Double Astrograph photographic plates are replaced by new CCDs. 2004: the SPM 3 is published (near 11 million stars). 2004: the SPM 3 is published (near 11 million stars). 2007: January 1st. Bill’s formal retirement. 2007: January 1st. Bill’s formal retirement. Historical Background (cont’d)

…and last, and more important… 1939: Bill van Altena was born. 1939: Bill van Altena was born.

OAFA’s construction

José A. López and Miguel Marzo inspecting the construction (March 1953)

Social gathering (asado, of course) during OAFA’s construction

Félix Aguilar Observatory (OAFA) was dedicated on September 28th, 1953

OAFA, March 2008

OAFA’s first director was Dr. Carlos U. Cesco Dr. Cesco

Eng. Félix Aguilar

E. Mannucci C. Cesco B. Dawson Observing a solar eclipse (early 1955)

J. Nissen S. Climens W. Manrique E. Patiño E. Mannucci J. López C. Cesco Probablemente mediados de 1965 The first OAFA’s Meridian Circle team (mid 1962)

OAFA’s Meridian Circle team (by the end of 1988)

Meridian Circle Satellite Laser Ranging Main Building La Plata Warehouse OAFA’s site (Google Earth’s view) N Costanera Ave. Benavídez Ave. Guests House Astrolabe PA II San Juan River YSO house

J. SchiltF. Scott D. Brouwer G. Clemence C. Cesco J. López Astrometry meeting at La Plata Observatory, by the end of 1959

Los Colorados El Leoncito Search Areas for the YCSO

Left to right: D. Brouwer, C. Cesco, J. Schilt, J. Sanguin, and G. Sánchez (Los Colorados, early 1960)

Left to right: G. Sánchez and J. Sanguin (Los Colorados, mid 1960)

C. Cesco D. Brouwer J. López Celebrating the construction of YCSO (by the end of 1962)

G. Sánchez and J. Sanguin (El Leoncito, late 1960) G. Sánchez, L. Cabrera, G. Sánchez and F. Muñoz (El Leoncito, late 1960)

D. Brouwer, C. Cesco and the Rector of Universidad de Cuyo, after signing the first agreement between YCSO and Argentina. Mendoza, 1962.

31 de marzo de 1965 A. Rodríguez y Olmos L. Bravo D. Brouwer The YCSO dedication day: March 31st, 1965

Dedication day expenses

Dedication day expenses (cont’d)

Bill van Altena, Terry Girard, and Arnold Klemola. Giant leap: from photographic plates to CCD. El Leoncito, 2000.

The Double Astrograph today

YSO, entrance gate. August 2008.

Dr. Carlos U. Cesco Station (Yale Southern Observatory) Double Astrograph Meridian Circle Solar Telescopes Residence, library, workshop and warehouse area Reflector

Warehouse Power House Residence Library Meridian Circle Solar Telescopes Double Astrograph Reflector Telescope N W Yale Southern Observatory (Google Earth’s view)

The SPM current status

… and finally…

Halley’s comet. The comet Bill never saw, although he had the chance… (he was busy doing something else)

Bill and Alicia dancing at the closing dinner of ADeLA meeting (Mexico, DF, 2008)