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Category: VSS Symposium 3
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VSS Symposium 3 Files: 6
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Visual Observing of CVs Size Filesize 2.81 MB
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The purpose of this presentation is two-fold:

(i) to share the pleasure I get from the visual observing of CVs and several other types of variables, and
(ii) to address the issue of declining visual observing and present some ideas about how to counteract the decline.

Bright Southern Cepheids Size Filesize 374.22 KB
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Presentation by Stan Walker at the RASNZ Conference 2014

This project has gradually evolved and we're now looking at those with periods in excess of ten days - which appear to be the likeliest to show period changes. Some objects are suited to DSLR photometry, others for binocular measures. O-C diagrams showing period changes, some abrupt, some parabolic and a few with possible short term fluctuations are presented. Some of these go back to the nineteenth century. A list of suitable stars has been compiled. Other aspects include the effects of filter wavelengths upon epochs of maxima and the problems with historical data, particularly photography.

EB and EW Binaries Project Size Filesize 926.77 KB
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Presentation by Mark Blackford at the VSS Symposium 3 at RASNZ Conference 2014

EB and EW eclipsing binaries are extremely close pairs, orbiting in a couple of days or less, and in the case of EWs sharing a common envelope. They are ideal targets for DSLR and CCD fast time series work, since a complete light curve can be obtained very quickly. In this project, which is mounted in collaboration with a spectroscopic research project of Ed Budding and colleagues, we will be using DSLRs and CCDs on selected southern EBs and EWs with the aim of obtaining complete transformed light curves, light elements, period variation analysis, and astrophysical modelling. Observers are encouraged to join the project, and to involve themselves in obtaining all these outcomes.

Transcription available here: The EB and EW Binaries Project

Variable Star Photometry with a DSLR Camera Size Filesize 3.51 MB
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Presentation by Mark Blackford at the VSS Symposium 3 at RASNZ Conference 2014

Pros and cons of using DSLR cameras for photometry of variable stars are discussed. Basic equipment selection and configuration, as well as more advanced topics are covered. Several cases studies are presented to illustrate the concepts. The problems of differential extinction and transformation are discussed and a simple solution presented. The procedures currently employed by the author were described in the workshop but not fully captured in the PowerPoint presentation. The workshop concluded with a discussion of problems encountered by the author and general comments/questions from participants.

Transcription available here: DSLR Photometry

Factors Affecting Nova Ejecta Size Filesize 3.2 MB
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Presentation prepared by Carl Knight and given in Carl's absence by Stan Walker at the VSS Symposium 3 at RASNZ 2014



A Marriage Made in Hell - The Intertwined Lives of Close Binary Systems Size Filesize 2.98 MB
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Presentation by Tom Richards at RASNZ Conference 2014


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