FOAC Meeting Notes
FUSE Observer's Advisory Committee
Minutes for Meeting No. 12
Ed Fitzpatrick, Michael Crenshaw, Andrea Dupree, Cynthia Froning, Jay Holberg, Alain Lecavelier des Estangs, Evan Skillman, Nicole St-Louis, Ken Sembach, Sumner Starrfield
Via Telecon; Jason Prochaska
George Sonneborn, Jeffery Hayes
Observatory Status – Blair (JHU)
The chronology of the events
FUSE GI Progam Status: Sonneborn (Goddard)
Cycle 6 produced the largest demand yet for FUSE observing time; 28.6 Msec requested by 183 proposals. As a result only (57) Excellent and Excellent/Very Good proposals were accepted. Following the Dec. 27 reaction wheel failure the approved Cycle 6 proposals were subjected to the following additional technical selection criteria:, including a target exclusion zone (06 hrs to 18 hrs and |dec| < 30 degrees), no moving targets, and a 35% reduction in available observing time. These selection criteria were implemented prior to the announcement of Cycle 6 results. Current plans call for a four-level prioritization of the observational scheduling based on science objectives. In addition a detailed examination of the feasibility of all pending observations will be conducted. PI’s will be contacted regarding the outcome of this review. The Project Scientist also outlined possible options for Cycle 7 and reviewed project budget status and budget projections. The Project Scientist noted NASA’s continued support and encouragement of the FUSE recovery effort.
FUSE Data Calibration, Reduction and Archiving: Van Dixon (JHU)
Van Dixon reported the CalFUSE v3.1 pipeline is complete and that the documentation and calibration efforts are ongoing. Final processing of the FUSE archive with CalFUSE v3.1 will begin this summer. CalFUSE v3.1 will include a number of significant improvements, including a more robust jitter algorithm, new limits on detector high voltage, wider HIST extraction windows and walk corrections, and a revised background-scaling routine. A new format for extracted spectral files is provided along with new time-dependent calibration files and a new algorithm for locating spectra on the detector.
CalFUSE v3.1 is intended to be the final revision to the FUSE data reduction software package and to be the processing benchmark for the final FUSE data archive. A PASP article will be written to document and explain CalFUSE v3.1 and augmented by on-line CalFUSE v3.1 documentation.
Nearly all FUSE data has now been processed by CalFUSE v3.0 and archived at MAST. Beginning this summer, all FUSE data will be re-processed by CalFUSE v3.1. This effort will be concluded by Sept. 2006.
The FOAC spent considerable time discussing the impact of the attitude control system problems on the mission’s science capabilities and the steps which could be taken to maximize these capabilities. A discussion of options for Cycle 7 quickly converged on retaining the planned proposal deadline and planning for a full year of observing. The need for various restrictions in Cycle 7 was also discussed and recommendations (see below) were adopted. One over riding observational constraint is likely to be targets restricted to high declinations (|dec| >~50 degrees). The need to maximize the science which could be achieved by FUSE in the coming months was also discussed. There was widespread agreement that a prioritization of programs and observations and was desirable and should be in place to augment the normal mission planning procedures, when high value targets become observable. Other items briefly discussed include, a special FUSE session scheduled for the winter AAS meeting and plans for the 2006 Senior Review.
The FOAC recognizes the extraordinary effort being made by the FUSE project in reacting to the spacecraft attitude problems that have occurred during the last six months. We wish to commend all who have worked so hard to regain control of the spacecraft and to re-establish a viable scientific observing program.
We recommend that:
1. Cycle 7 proceeds on schedule with the goal of a full year of planned observations.
2. To assist proposers, observational planning aids such as newly defined target visibility zones and availability be made available in a timely manner prior to the proposal deadline.
3. Observing restrictions including no moving targets and no coordinated observations, be accepted in Cycle 7.
4. Programmatically Cycle 7 should not include Legacy Programs or Multi-Year Programs. Survey Program Proposals should be encouraged.