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Royal Astronomical Society of New ZealandSouthern Stars: Abstracts Volume 39, September 2000 and December 2000 (2 issues only). |
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Royal Astronomical Society of New ZealandSouthern Stars: Abstracts Volume 39, September 2000 and December 2000 (2 issues only). |
Southern Stars Vol 39 Contents. RASNZ Home Page
Southern Stars:
Volume 39, number 1. September 2000. Pp 1
- 28
Characteristics of
the Mt John Series 200 CCD System
Micrometrial Measures
of NZO Double Stars
Amateur Radio
Astronomy
The Development of
the Radioastronomy Project at the CIT
Characteristics of
the Mt John Series 200 CCD System
S. I. Barnes, M. Clark, P. L. Cottrell, J. B. Hearnshaw,
Orlon K. L. Petterson, Karen R. Pollard, J. D. Pritchard, A.
Richards and William Tobin
A second research-grade, cryogenic CCD system has been acquired
from Photometrics Ltd of Tucson for use at the Mt John University
Observatory. Compared to the first PM 3000 system,
the new Series 200 system has a much larger CCD chip which is
almost twice as sensitive. The base level noise and
pixel-to-pixel charge transfer efficiency are significantly
improved. However the cryostat vacuum degrades
relatively rapidly and, as with the older system, extensive
reprogramming of the control software has been necessary to
produce a system that is easy and convenient to use at the
telescope.
Volume 39, number 1. September 2000. Pp 1 - 8
Micrometrial
Measures of NZO Double Stars
Ormond C. R. Warren, Raymond Lee and Rodney R. D.
Austin
This list gives the means of 149 measures of position angle and
147 measures of separation of 55 NZO pairs (discovered at the
Ward(Wanganui) Astronomical Observatory early last century),
using the 24cm f/15 "Fletcher" equatorial and the Wanganui
Astronomical Society's Type A bifilar micrometer.
These measures were made between 1990.082 and 1994.348.
Volume 39, number 1. September 2000. Pp 9 - 12
Amateur Radio
Astronomy
Wayne Thresher
The role of the amateur in radioastronomy is reviewed.
Accessible topics are considered, and the author's
experience in constructing a small radio-observatory, equipped
with a 7-m parabolic dish and S-band microwave receiving system
briefly recounted. Potentially useful websites and
reading lists are also collected.
Volume 39, number 1. September 2000. Pp 13 - 20
The Development of
the Radioastronomy Project at the CIT
A.W.Dodson and E. Budding
After a review of the practical background of the building of the
5-m microwave radiotelescope on the CIT campus, a small number of
preliminary astronomical results will be presented.
The question of where such work fits into New Zealand science is
also raised. References are made to certain new
opportunities.
Volume 39, number 1. September 2000. Pp 21 - 28
Southern Stars Vol 39 Contents
Southern Stars:
Volume 39, number 2. December 2000. Pp 29
- 60
EX Hydrae - Eclipse
and Spin Timings at Millennium's End
Microwave
Observations of the Moon
The Sun in
1999
Wellington
Astronomers of the 1840s
EX Hydrae -
Eclipse and Spin Timings ar Millennium's End
W.S.G. Walker, W.H. Allen
EX Hya is a well known member of the class of intermediate polar
variable stars. We made observations to study the changes in the
orbital period and the rotation or spin period of the white dwarf
component. Measures in 1998-2000 show little change in the first
period, but suggest that the rotation period is continuing to
decrease. Our measures, and the historical measures, are fitted
better by abrupt changes in the spin period.
Volume 39, number 2. December 2000. Pp 29 - 35
Microwave
Observations of the Moon
E. Budding, A. Dodson, H. Trethowen
After a general review of current understanding of the Moon, we
focus on the heat flow problem in the lunar surface regions. A
model is developed which can predict the monthly temperature
variations at a given depth. Such modelling is then compared with
recent observations at 4 and 12 GHz carried out with the 5 m
radioantenna at the CIT. We show that the mean lunar temperatures
are measurably the same at these frequencies (~255 +/- 15 K). We
also show that a low value of the thermal conductivity (~0.01) is
implied for the lunar regolith.
Volume 39, number 2. December 2000. Pp 36 - 50
The Sun in
1999
R.W. Evans, Director of the Aurora and Solar Section,
RASNZ
White light observations of the Sun in 1999 submitted to the
Aurora & Solar Section are presented and discussed.
Volume 39, number 2. December 2000. Pp 51 - 54
Wellington
Astronomers of the 1840s
Wayne Orchiston
During the 1840s, soon after the initial European settlement of
Port Nicholson, Wellington gained its first astronomers, J.
Hurley, J.H. Marriott and R. Sheppard.
Volume 39, number 2. December 2000. Pp 55 - 57
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