HST Call for Proposals for Cycle 25
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Hubble Space Telescope Call for Proposals for Cycle 25 > Chapter 1: General Information > 1.3 The ΔCycle 26: Planed Changes in the Schedule and Opportunities in 2018

1.3
The ΔCycle 26: Planed Changes in the Schedule and Opportunities in 2018
The first cycle of JWST will pose challenges for the HST user community. As described in the STScI Newsletter article, “Scheduling Hubble in the Era of Webb,” changes to the regular schedule of the Call for Proposals, and the opportunities offered in the solicitation, are now necessary for Cycle 26. These changes should maximize scientific opportunities while also minimizing the potential burden on the community. These changes are only in place for Cycle 26: current plans are to return to the nominal schedule and opportunities for Cycle 27 in 2019.
With this, the Cycle 25 solicitation, we invite investigators to propose for Small GO programs for Cycle 26. The Cycle 25 TAC will have 1200 orbits to pre-allocate for these Small programs to execute in the 2018-2019 cycle. This still allows the opportunity to propose for other proposal categories, in a “Δ opportunity”, in 2018.
The Cycle 26 Call for Proposals issued around mid-April 2018, with proposals due in mid-July 2018. Cycle 26 will be a ΔCycle: soliciting proposals for Medium, Large, and Treasury GO programs, as well as AR Legacy, Joint HST-Chandra, and Joint HST-XMM proposals. A ΔTAC will review in mid-September 2018.
Investigators should note the ΔTAC will not provide an opportunity to submit Small GO programs (<35 orbits). Furthermore, there are no plans to offer Regular AR, Theory, or Snapshot programs in the ΔCycle. Investigators should plan accordingly.
The mid-cycle opportunities will continue, with two deadlines in Cycle 25, and one in Cycle 26 (in February 2019). There will also be the nominal pool for Director’s Discretionary proposals in Cycles 25 and 26.
The HST proposal schedule (and opportunities) will return to the normal schedule in Cycle 27, with the Call scheduled for release in January 2019.

Hubble Space Telescope Call for Proposals for Cycle 25 > Chapter 1: General Information > 1.3 The ΔCycle 26: Planed Changes in the Schedule and Opportunities in 2018

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