The Félix Aguilar and Yale Southern Observatories
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1 The Félix Aguilar and Yale Southern Observatories A Historical Travelogue Carlos E. López Félix Aguilar Observatory and Yale Southern Observatory San Juan, Argentina
2 Historical Background. 1718: Halley announces the proper motion of the stars. 1775: Mayer publishes the first proper motions catalogue. 1783: Herschel suggests the idea of solar motion. 1887: the Astrographic Catalogue is started. 1916: Barnard discovers his famous star. 1926: Schlesinger starts the Yale Zones. 1947: Wright starts the NPM. 1950: Luyten starts to survey both hemispheres for high proper motion stars.
3 Historical Background (cont d) 1952: the IAU suggests to extend the NPM to the south. 1953: the Yale Columbia association is established. 1953: dedication of the Félix Aguilar Observatory. 1960: Giclas starts his survey. 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. 1973: Columbia University abandoned the project.
4 Historical Background (cont d) 1974: San Juan University is invited to take part in the SPM program. 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 first epoch of the SPM is officially finished. 1987: Carlos U. Cesco passed away. 1987: the second epoch of the SPM is started. 1989: ESA launches the Hipparcos satellite. 1990: NASA launches the HST.
5 Historical Background (cont d) 1995: the fourth edition of the Yale Trigonometric Parallaxes Catalogue is published. 1998: the SPM 1 is published. 2000: Monet announces the USNO B. 2000: the Double Astrograph photographic plates are replaced by new CCDs. 2004: the SPM 3 is published (near 11 million stars). 2007: January 1st. Bill s formal retirement.
6 and last, and more important 1939: Bill van Altena was born.
7 OAFA s construction
8 José A. López and Miguel Marzo inspecting the construction (March 1953)
9 Social gathering (asado, of course) during OAFA s construction
10 Félix Aguilar Observatory (OAFA) was dedicated on September 28th, 1953
11 OAFA, March 2008
12 Dr. Cesco OAFA s first director was Dr. Carlos U. Cesco
13 Eng. Félix Aguilar
14 B. Dawson E. Mannucci C. Cesco Observing a solar eclipse (early 1955)
15 W. Manrique J. López S. Climens C. Cesco J. Nissen E. Patiño E. Mannucci The first OAFA s Meridian Circle team (mid 1962) Probablemente mediados de 1965
16 OAFA s Meridian Circle team (by the end of 1988)
17 N Satellite Laser Ranging La Plata Warehouse Meridian Circle Main Building Astrolabe PA II Guests House Benavídez Ave. YSO house OAFA s site (Google Earth s view)
18 C. Cesco J. López G. Clemence D. Brouwer J. Schilt F. Scott Astrometry meeting at La Plata Observatory, by the end of 1959
19 Los Colorados El Leoncito Search Areas for the YCSO
20 Left to right: D. Brouwer, C. Cesco, J. Schilt, J. Sanguin, and G. Sánchez (Los Colorados, early 1960)
21 Left to right: G. Sánchez and J. Sanguin (Los Colorados, mid 1960)
22 J. López D. Brouwer C. Cesco Celebrating the construction of YCSO (by the end of 1962)
23 G. Sánchez and J. Sanguin (El Leoncito, late 1960) G. Sánchez, L. Cabrera, G. Sánchez and F. Muñoz (El Leoncito, late 1960)
24 D. Brouwer, C. Cesco and the Rector of Universidad de Cuyo, after signing the first agreement between YCSO and Argentina. Mendoza, 1962.
25 A. Rodríguez y Olmos L. Bravo D. Brouwer The YCSO dedication 31 de marzo day: de 1965 March 31st, 1965
26 The YCSO dedication day: March 31st, 1965
27 Dedication day expenses
28 Dedication day expenses (cont d)
29 Dedication day expenses (cont d)
30 Bill van Altena, Terry Girard, and Arnold Klemola. Giant leap: from photographic plates to CCD. El Leoncito, 2000.
31 The Double Astrograph today
32 YSO, entrance gate. August 2008.
33 Dr. Carlos U. Cesco Station (Yale Southern Observatory) Solar Telescopes Meridian Circle Reflector Double Astrograph Residence, library, workshop and warehouse area
34 N W Residence Library Power House Reflector Telescope Meridian Circle Solar Telescopes Warehouse Double Astrograph Yale Southern Observatory (Google Earth s view)
35 The SPM current status
36 and finally
37 Halley s comet. The comet Bill never saw, although he had the chance (he was busy doing something else)
38 Bill and Alicia dancing at the closing dinner of ADeLA meeting (Mexico, DF, 2008)
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