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ATNF ATUC Memorandum

To: ATUC
From: D McConnell
Date: 25 November 2005
Subject Target-of-Opportunity criteria

Responding to a request for telescope access for a Target-of-Opportunity
(ToO) involves answering the following questions.

1. Are the requested observations urgent?
- Is there a time-critical aspect to the scientific question, such as
time variability of the object concerned?
- Is it in the interests of the scientific community to answer the
question quickly; for example to contribute to contribute to a new
and topical discussion of great scientific interest?
2. Is the requested observation technically and operationally feasible?
- There may be telescope facilities normally offered, but not
available at short notice;
- Operational resources may not be available for the proposed
observation.
3. Is the scientific merit of the proposal sufficient to commit telescope
resources?
- There is an operational cost, even if the telescope would otherwise
not be engaged in astronomical measurements.
4. Does the scientific merit of the proposal exceed that of scheduled
observations that would be displaced by granting the ToO observations?
- This is a question of scientific judgement, and the Director may
choose to consult the TAC chair or other TAC members for advice on
this question.
5. Are the proposers of the ToO observations willing to make the data
public immediately (within 1 week)
- It is a condition of using telescope override observations that the
normal 18 month proprietary period be waived.

If there is an affirmative answer to all these questions the ToO time will
be granted. The Director may choose to modify the precise details of the
requested observations for scientific, technical or operational reasons.