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GO Program: Cycle 3 Report and Review Plan

The Suzaku Guest Observer (GO) Program Cycle 3 is now open to competitive proposals, excluding calibration observations and real-time Target of Opportunity (TOO) requests. This cycle features a two-stage submission process for science and budgeting proposals. Priority targets are categorized into A, B, and C, with adjustments made for Long Program requests exceeding 300 ksec. Observations are scheduled from April 2008 to March 2009, with key deadlines and meetings outlined. This communication seeks to enhance engagement and feedback for future cycles.

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GO Program: Cycle 3 Report and Review Plan

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  1. GO Program: Cycle 3 Report and Review Plan Koji Mukai Suzaku Guest Observer Facility

  2. GO Program Overview • 100% open to competition (except calibration observations and real-time TOOs); no more guaranteed time • Stage 1 (science) proposals: parallel submission and review in the US, Japan and ESA • International merging meeting to resolve target conflicts; some proposals are “merged” with US and Japanese PIs • Priority L, A and B targets are guaranteed to be observed; C targets as schedule filler • Stage 2 (budget) proposals for US-based investigators • Additionally, TOO requests can be submitted for unexpected phenomena Suzaku Users' Group Meeting

  3. Cycle 2 Statistics • 156 proposals submitted to US; 24.1 Ms total time, or 22.1 Ms of non-overlapping, XIS2-adjusted time, requested (factor of >4 oversubscriptioin) • 132 proposals to ISAS, 17.9/16.1 Ms, ~3 o.s. • US Share: 37.5% (US) + 12.5% (JUS), or 6.2 Ms + 2.1 Ms after x1.4 oversubscription • 50% priority A, 40% B, and 50% C • TOO and Time Critical observations must be As • Strong competition for BHC TOOs • 47 (A or B) + 26 (C only) proposals accepted Suzaku Users' Group Meeting

  4. Changes in Cycle 3 • “Long Program” category (as per Users’ Group recommendation) • For proposals requesting over 300 ksec • ~1 Msec is set aside for LP proposals • LP data will become public immediately • Priority division: 60% L+A, 30% B, and 50% C • Slight adjustment in expected observing efficiency (37 ksec/day-> 38 ksec/day) Suzaku Users' Group Meeting

  5. Cycle 3 Schedule • Observations during Apr 2008-Mar 2009 • ROSES-2007 released: Feb 16, 2007 • Proposal Deadline: Nov 30, 2007 • US Review: Feb 11-13, 2008 • International Merging: Mar 3 & 4, 2008 • Stage 2: late March release, early May deadline, review in late June (?) Suzaku Users' Group Meeting

  6. Cycle 3 Proposals • A total of 120 proposals requesting 21.2 Msec, or an oversubscription factor of ~3.5 • There were 9 LP proposals (5 on AGN; 1 each of BHC, AXP, SNR, and clusters) requesting 3.4 Msec of time • The oversubscription for regular proposals is effectively lower due to TOO proposals Suzaku Users' Group Meeting

  7. Cycle 3 Review Plan • 4 panels - 2 Galactic, 2 extragalactic (have confirmed 10 reviewers so far) • Panels rank regular proposals and award time as usual • Each LP proposal will be placed in two panels and ranked along with regular proposals (but panels do not award time to LP proposals) • Final plenary session (4 chairs + 4 deputies ?) will award time to LP proposals and make some adjustments to regular proposals Suzaku Users' Group Meeting

  8. Cycle 4 and beyond • US-Japanese time allocation to be confirmed (37.5+12.5%?) • We hope to keep Long Program category in some form • Merging meeting will review how it worked out in Cycle 3, and may recommend some changes • Users’ Group inputs are welcome Suzaku Users' Group Meeting

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