D.H. MORGAN, PASA, 15 (1), 123
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Current Work
Some work has been started using H filters with CCD detectors on large telescopes (see Azzopardi 1993). These systems cover very small areas and are designed to produce highly detailed surveys of emission-line stars and small planetary nebulae in selected areas around objects such as clusters and associations.
Another ongoing survey is by Smith et al. (these proceedings) which uses several interference filters including H in conjuction with a CCD detector on the Curtis Schmidt Telescope. The survey covers most of the central parts of each Cloud, but, at 3 arcsec resolution, it is designed for extended objects and is not ideal for point sources. It remains to be seen how many new planetary nebulae will be discovered.
Finally, there is an interference filter CCD survey by Dopita et al. (private communication) of a significant part of the centre of the LMC which is expected to generate significant numbers of planetary nebulae too faint to be seen in the UKST surveys.
Next Section: Use of New Filter Title/Abstract Page: H Emission From Point Previous Section: Past surveys | Contents Page: Volume 15, Number 1 |
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