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William A. Baum1

Male
b. 18 January 1924, d. 10 June 2012


Mother Mabel Louise Teachout1 b. 1 July 1890, d. 26 May 1983
Father Lt. Earle Fayette Baum1 b. 13 September 1889, d. 28 October 1965
Pop-up Pedigree

Family Ester Bru b. circa 1931
Marriage* 27 June 1961  Bergen, Norway, Principal=Ester Bru4 

Birth* 18 January 1924  OH1,2 
Census* 1930  1930 Federal Census, Ohio, Lucas County, Toledo, Ward 15, ED: 48-236, Series: T624, Roll: 1838, Page: 239B, April 4
Sheet 14B, Block 141, 748 Hampton Avenue
(enumerated with father, Earle F Baum)
95, 55, 55, Baum, William A, Son, , , , No, M, W, 6, S, , Yes, , Ohio, Ohio, Ohio, , 59, , , , , , None, , , , , , , ,1 
Census 1940  1940 Federal Census, Ohio, Lucas County, Adams Township, ED: 48-2, Series: T627, Roll: 3105, Page: 18A, May 10
Sheet 18A
(enumerated with father, Earle F Baum)
38, 392, , , , ,Baum, William A, Son, 2, M, W, 16, S, Yes, H3, 20, Ohio, 59, , Toledo, Lucas, Ohio, No, 4847, No, No, No, No, S, 6, , , , , , 0, 0, No,3 
Education* 1943  University of Rochester, Rochester, Monroe Co., NY, B.S. in Physics 
Education 1948  Caltech, Pasadena, Los Angeles Co., CA, P.H.D. 
Marriage* 27 June 1961  Bergen, Norway, Principal=Ester Bru4 
Death* 10 June 2012  Seattle, King Co., WA2,5 
SSN* 10 June 2012  https://familysearch.org/pal:/MM9.1.1/K49X-PN7
first name: William
middle name: A
last name: Baum
name suffix:
birth date: 18 January 1924
social security number:
place of issuance: District Of Columbia
last residence:
zip code of last residence:
death date: 10 June 2012
estimated age at death: 88
Collection: "United States Social Security Death Index," William A Baum, 20122 
News/Obit 18 June 2012  Baum , William A

Baum, William A, 88 of Seattle, June 10.

Published in the Seattle Post-Intelligencer (WA) - June 18, 20125 
News/Obit 27 June 2012  William A. Baum

Died On: 2012-06-10

William Alvin “Bill” Baum was a versatile astronomer who helped Richard Tousey obtain the first ultraviolet spectrum of the Sun, developed the first photoelectric photometers for the Mt. Wilson & Palomar Observatories, worked with J. D. McGee in London on early solid-state imaging devices, headed the Planetary Research Center at the Lowell Observatory to monitor Mars (and other planets) and plan the first spacecraft (Viking Mission) to it, and helped plan and use the Hubble Space Telescope. He wrote papers on the photodetectors, cameras, planetary rings, cosmology, stellar populations in globular clusters and galaxies, etc.

Bill was born on 18 January 1924 on a small farm near Toledo, Ohio. He received a full-tuition scholarship to the University of Rochester to obtain a B.S. in Physics in 1943. He started graduate work at Caltech but needed to contribute to the war effort, first in the Navy Liaison Office at Caltech and then at the Naval Research Laboratory in Washington, DC. After the war he continued to work with Richard Tousey; they used captured V2 rockets to get the first ultraviolet (UV) spectrum of the Sun. The first flight in June 1946 buried itself in a deep crater, but the second in October 1946 produced the first spectrum in the UV of an astronomical object.

The ultimate goal of UV space spectroscopy was to reach the Lyman alpha feature at 1216 A*'ngstroms, the ground state of the hydrogen atom. For his Ph.D. thesis in 1948 at Caltech, Bill designed a fast spectrograph to observe 1216 and fit into an Aerobee rocket from White Sands. He watched as the rocket exploded and scattered his spectrograph parts widely over the desert. So he did an UV transmission spectrum of the LA smog, which helped in pollution control.

In 1950 after the completion of the Palomar 200-inch telescope, Director Ira S. Bowen realized that future observations would be made with fast electronic devices (photoelectric “photon counters’), rather than photographic plates. He hired Bill on the Mt. Wilson and Palomar Observatories (MtW&P) staff to produce such equipment. His photometers were 40 times faster than photographic plates. He provided calibration standards for Edwin Hubble to improve the redshift relation and for Walter Baade to determine population types in galaxies. In 1953 he worked with Allan Sandage and Halton Arp to observe main-sequence stars for the first time in nearby globular clusters to test the new evolutionary calculations of Martin Schwarzschild and Sandage, and to get accurate distances for globular clusters.

Bill wanted to develop two-dimensional photon-counting devices to replace slow photographic plates. Director Bowen thought that such developments would be too difficult and expensive for MtW&P, and that astronomers should wait for industry to develop them. In an act of courage, Bill appealed to Vannevar Bush, President of the Carnegie Institution, who overruled Bowen and gave Bill permission to proceed. He worked first with Kent Ford and then took a leave of absence and went to England to work with J. D. McGee, who was well-funded at Imperial College, to work on photoconductive detectors (e.g. videocons). Those proved to be less sensitive than other devices, so later Bill joined a team to use Charge-Coupled Devices (CCDs) in a Wide-Field and Planetary Camera on the Hubble Space Telescope (HST).

It was in London in 1960-61 that Bill met Ester Bru, an unusually attractive Norwegian woman, and they were married in Bergen on 27 June 1961. They made many trips to Norway in the following years. After returning to Pasadena, she became a librarian at the Huntington Library and at the MtW&P Observatory. In 1965 Bill was appointed Director of the NASA-funded Planetary Research Center in Flagstaff. They archived planetary data, developed a network of dedicated telescopes around the world to monitor Mars and other planets, and aided in the Viking Mission to Mars. That spacecraft carried two orbiters and two landers. Bill was on the Orbiter Imaging Team and Landing Site Selection Team.

Then in 1977 Bill joined the science team that proposed, designed, and tested CCDs to be used in the Hubble Space Telescope (HST) . He was a co-author on about 20 papers from HST on stellar populations in galaxies and the cosmological distance scale, the amount of missing matter, and dark energy. In 1990 he retired from the Planetary Research Center. He and Ester moved to Seattle, where Bill accepted a research professorship at the University of Washington.

Bill published more than 200 papers on image detectors, the HST camera, cosmology, stellar populations, solar system planets and rings – a remarkable range of topics. Bill liked classical music (as did most observational astronomers who worked in domes), gardening, and inventing gadgets and useful objects. He always seemed cheerful and ready for something humorous. While somewhat shy, he was always dedicated to the scientific projects in hand. Sadly, he developed Parkinson’s Disease in about 2001 and spent the last three years of his life in an assisted living facility. He died on 10 June 2012, survived by his wife, Ester, of 50 years. In Seattle she, an accomplished pianist, has been obtaining scholarships for students at the University of Washington and arranging concerts.

This obituary was based partly on his own short autobiography and partly on notes from his friend Ted Barss. The photograph of Bill was taken when he was about 45.

Reference Links:

Published in The Journal of The American Astrology Society, June 27, 2012

http://aas.org/node/49884 
News/Obit* 9 September 2012  William A. Baum

William Alvin Baum, who directed the Planetary Research Center at Lowell Observatory from 1965 to 1990, died June 10, 2012, in Seattle. He was 88. A concert in his honor by the Oceana String Quartet will take place Sept. 12 at 7 p.m. at University House in Seattle. Info: esterbaum@gmail.com or (206) 527-4306.

Published in The Arizona Daily Sun, (Flagstaff, AZ) - September 9, 20122 

Images

Citations
  1. [S248] 1930 U.S. Federal Census , 1930 U.S. Federal Census.
  2. [S129] SSDI Death Index,.
  3. [S1286] 1940 U.S. Federal Census , 1940 U.S. Federal Census.
  4. [S1421] American Astrology Society Journal, online http://aas.org, http://aas.org/node/4988.
  5. [S323] News Bank.


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