Journal contents items – Page 105 – British Astronomical Association

The BAA Summer Meeting: Cosmology today — Probing the dark side of the Universe

The BAA Summer Meeting brought over 150 people to the city of York on July 2, for a day of talks and discussions designed to bring us up to date on some of the most exciting new developments in modern cosmology.

Ordinary Meeting & George Alcock Memorial Lecture, 2016 May 25

Meeting of the Meteor Section, 2015 May 9

BAA Update

HR Lyr: The fitful slumbers of an old nova

Generally speaking, variable star observers get excited when a star becomes unusually bright. However, that’s not always the case. Cataclysmic

Down in the autumn murk

Many constellations don’t rise very high above the southern horizon in the UK, and in the autumn months Aquarius is

Observers’ Forum

Report of the Council

High resolution imaging of mutual events of the Jovian satellites during the 2014/2015 apparition

During the 2014/2015 Jupiter apparition several mutual occultations and eclipses of the Galilean satellites took place. These mutual events occur every 5.93 years. A number of the events were recorded using 14-inch [355mm] or larger telescopes and different types of cameras. Processing programs like Registax 6.1 or Autostakkert2! struggle to grade, align and stack the tiny images of the Jovian satellites. To obtain high resolution images different processing procedures were employed to optimise the quality of the images, including hand selection and the use of master frames. Several occultations and eclipses were recorded at high resolution.

The period of R Scuti

R Scuti is a variable star which, for over a century, has shown episodes of RV Tauri-type behaviour, together with significant spectral variations that appear to be associated with its brightness. This paper examines the photometric data amassed by the BAA and the AFOEV, and finds periods of nominally 71 and 142 days.