1 The Taurus Tunable Filter web site is maintained at the Anglo-Australian Observatory: http://www.aao.gov.au/ttf/
Detection and measurement from narrow-band tunable filter scans
Article first published online: 4 APR 2002
Monthly Notices of the Royal Astronomical Society
Volume 329, Issue 4, pages 759–774, February 2002
How to Cite
Jones, D. H., Shopbell, P. L. and Bland-Hawthorn, J. (2002), Detection and measurement from narrow-band tunable filter scans. Monthly Notices of the Royal Astronomical Society, 329: 759–774. doi: 10.1046/j.1365-8711.2002.05001.x
2 The theoretical sinc2 response of slit-aperture devices is rarely achieved in practice.
3 The transform is some form of a convolution equation in that (λ,l) broadens FS(λ) although, technically, the term ‘convolution’ should be reserved for integrals of the form , but note that this is a special case of equation (17). Suffice it to say, a spectral line broadened by a spectrometer arises from a convolution and not from a product.
- Issue published online: 4 APR 2002
- Article first published online: 4 APR 2002
- Accepted 2001 September 18. Received 2001 August 4; in original form 2001 January 22
- instrumentation: interferometers;
- methods: data analysis;
- methods: observational;
- techniques: photometric
The past 5 years have seen a rapid rise in the use of tunable filters in many diverse fields of astronomy, through Taurus Tunable Filter (TTF) instruments at the Anglo-Australian and William Herschel Telescopes. Over this time we have continually refined aspects of operation and developed a collection of special techniques to handle the data produced by these novel imaging instruments. In this paper, we review calibration procedures and summarize the theoretical basis for Fabry–Perot photometry that is central to effective tunable imaging. Specific mention is made of object detection and classification from deep narrow-band surveys containing several hundred objects per field. We also discuss methods for recognizing and dealing with artefacts (scattered light, atmospheric effects, etc.), which can seriously compromise the photometric integrity of the data if left untreated. Attention is paid to the different families of ghost reflections encountered, and the strategies used to minimize their presence. In our closing remarks, future directions for tunable imaging are outlined and contrasted with the Fabry–Perot technology employed in the current generation of tunable imagers.