Tim Napier-Munn and Graeme Jenkinson have published a paper on neglected souther multiple systems in Pavo in the Webb Society Double Star Section Circulars.
Measurements of six neglected southern multiple stars have been made using a Meade DSI CCD camera coupled to a 150mm f8 refractor. The images have been analysed using Losse’s REDUC software. The paper describes the method in some detail, including some analysis of the source and magnitude of errors. The results show that position angle can be measured to a mean 95% confidence interval of 0◦.6 and separation to 0′′.25.
The Webb Society Double Star Section Circulars No 17 Contents. (2009). Retrieved from https://www.webbdeepsky.com/dssc/dssc17.pdf