NACAA 2016 Presentations
The following presentations were made at the National Australian Convention of Amateur Astronomers (NACAA) in 2016.
Colour photometry in astrophysics
Presented by Stan Walker
Colour photometry as a simple alternative to spectra was introduced with the development of filtered photoelectric photometry in the 1950s. It is cruder in some ways and relies heavily upon empirical relationships. However, it is quicker and simpler than spectra and ca...
DSLR Photometry Highlights
Presented by Mark Blackford
A basic digital single lens reflex (DSLR) camera can provide research-quality photometry if appropriate care is taken when recording and analysing images. This talk will give a general background to the equipment and techniques employed by the author. This will be f...
DSLR Photometry of the High Amplitude delta Scuti Stars V1338 Centauri, V1430 Scorpii and V1307 Scorpii
Presented by Roy Axelsen
V1338 Centauri, V1430 Scorpii and V1307 Scorpii are high amplitude delta Scuti stars for which the last period determinations were made in 2006, 2004 and 2001 respectively. In view of the elapse of time since, DSLR photometry was taken from April to August 2015. Fourie...
The Stellar Detective
Presented by Tom Richards
Capturing a light curve of stellar eclipses, transits, or occultations – by stars or planets – can often be done in a single night with electronic imaging. Although sophisticated software is available to help you derive astrophysical information from the light curve (...
Visual observations of the Magellanic Clouds - Past and Present
Presented by Alan Plummer
Of all the night sky, no fields are so rich or challenging to observe than the Large and Small Magellanic Clouds. What follows are some highlights of historical observations of these fields, along with recent visual variable star estimates of selected stars. The firs...