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Bernard Mills and the other Australian Discrete Source investigations 1949-1958 Harry Wendt New Zealand and the Beginnings of Radio Astronomy January 2013 Background on Bernard Mills Ruby Payne-Scott Joe Pawsey 1948 Eclipse Christiansen,

SLIDE 1

Bernard Mills and the other Australian Discrete Source investigations 1949-1958

Harry Wendt New Zealand and the Beginnings

f Radio Astronomy

January 2013

SLIDE 2

Background on Bernard Mills

Ruby Payne-Scott Joe Pawsey

SLIDE 3

1948 Eclipse

Christiansen, Yabsley & Mills

“Chris” Christiansen Don Yabsley

SLIDE 4

Background on Discrete Radio Sources

Hey, Parsons & Phillips 1946

160 MHz

Reber 1944

64 MHz

SLIDE 5

Australian Discrete Sources Research

John Bolton

100 MHz

SLIDE 6

408 MHz Sky

Cygnus - A Cassiopeia - A Taurus - A Centaurus - A Virgo - A

SLIDE 7

Potts Hill 1949

97 MHz Observations with Aidan

Thomas

Cygnus A position and tentative

identification discounted

Ionospheric scintillation confirmation

SLIDE 8

Cygnus-A 97 MHz

SLIDE 9

Field Station Locations Badgerys Creek Potts Hill

SLIDE 10

Fleurs Badgerys Creek

SLIDE 11

Badgerys Creek

101 MHz Observations

supported by Arthur Watkinson

Bernie Mills

SLIDE 12

Discrete Source Survey 1952

Confirmed Bolton, Stanley & Slee

Discrete Source Identifications

77 Discrete sources, two main

population classes

SLIDE 13

Radio-Link

Interferometer

Radio Brightness

Distributions

Preliminary results at

URSI 1952

SLIDE 14

The Idea for a Cross

SLIDE 15

Prototype at Potts Hill 1953

SLIDE 16

SLIDE 17

Fleurs Field Station

SLIDE 18

Mills Cross at Fleurs

Joined by Alec Little
Constructed 1953-45
85.5 MHz Observations

48 arcmin beamwidth

Alec Little Bernie Mills

SLIDE 19

Mills Cross at Fleurs

SLIDE 20

Southern Sky Survey - MSH

Bruce Slee

SLIDE 21

Controversy with Cambridge

SLIDE 22

Conclusion

In 1958 Mills attended the Paris Symposium on Radio

Astronomy and then IAU General Assembly in Moscow

Awarded Doctor of Science in Engineering for thesis

covering development of the Mills Cross

End of an Era –> Schism at CSIRO Radiophysics

Bernie Mills Chris Christiansen