Conclusion

(a.) The value of visual searching has again been demonstrated, and support for this kind of work should be improved. Especially, visual searching with more modest telescopes is more useful in finding brighter supernovae, which, in turn, have a particular value for scientific research at present. However, at this time in the history of astronomy, when supernova studies are playing an important role in so many areas of astrophysical interest (Cappellaro 1996), any efficient method of finding supernovae deserves support. This certainly applies to visual searches using larger telescopes such as the 40 inch, or other telescopes of similar capacity, which can monitor a large number of galaxies over considerable distances.

(b.) These figures also indicate that the Perth search was very effective, and probably found all the supernovae that fell within the parameters of its set task. Both types of searching have their own particular merit and role to play. Despite some claims to the contrary, there is no indication that any one method will make the other methods of searching unnecessary. None of the three searches described here would have found all of the supernovae listed.

(c.) Use of a dedicated telescope is a great advantage, especially in a visual search where access to moonless nights and good weather is more important. It is especially desirable that a dedicated and user-friendly telescope of substantial aperture should be available to prosecute this work more fully and efficiently. The results obtained with the 40 inch telescope were made using only one part in seven of allocatable observing time, including a good percentage of bright moonlight. A great deal more could be achieved if more observing time, including a greater proportion of dark time, were available.

© Copyright Astronomical Society of Australia 1997