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General introduction: HSC collaboration meeting at Princeton

General introduction: HSC collaboration meeting at Princeton. Yasushi Suto Department of Physics, The University of Tokyo (Global Scholar, Dept. of Astrophys. Sci., Princeton Univ.). HSC collaboration meeting @Princeton, Nov. 11 & 12, 2009. Proposed agenda: Wed., Nov. 11.

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General introduction: HSC collaboration meeting at Princeton

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  1. General introduction:HSC collaboration meeting at Princeton Yasushi Suto Department of Physics, The University of Tokyo (Global Scholar, Dept. of Astrophys. Sci., Princeton Univ.) HSC collaboration meeting @Princeton, Nov. 11 & 12, 2009

  2. Proposed agenda: Wed., Nov. 11 • 14:00-14:30 Yasushi Suto: • HSC organization: advisory council , survey design committee, working group • Summary of discussion on Sept. 25 at University of Tokyo • Purpose of this meeting • 14:30-15:00 discussion • 15:00-16:00 current plan of 3 surveys • 10 min presentations by chairs of each survey + 10 min discussion • 16:00-16:30 coffee • 16:30-18:00 discussion led by Masahiro Takada on collaboration policy, etc.

  3. Proposed agenda: Thu., Nov.12 • 9:00-12:00 parallel session on how to optimize the current survey plan • Wide survey (chair: Masahiro Takada) • Deep survey (chair: Tomoki Morokuma) • Ultra-deep survey (chair: Masami Ouchi) • 13:30-15:30 summary of the morning session and discussion • 13:30-14:10 Masahiro Takada: wide-survey • 14:10-14:50 Tomoki Morokuma: deep survey • 14:50-15:30 Masami Ouchi: ultra-deep survey • 15:30-16:00 coffee • 16:00-18:00 further discussion toward the proposal led by Michael Strauss

  4. Outline of this collaboration meeting • Establish the HSC organization • advisory council , survey design committee, working group • How to proceed • Summary of discussion on Sept. 25 at The University of Tokyo • Survey designs • Collaboration policy • Data right

  5. We have to avoid this kind of fight among HSC collaborators

  6. A possible HSC organizationproposed on Jan. 19, 2009 at NAOJ H.Karoji S.Miyazaki PI N-PAC council HSC Survey Design Committee Advisers M.Takada: weak lens K.Shimasaku: high-z objects M.Chiba: Galactic archeology J.Gunn: galaxy evolution M.Strauss: everything scientific D.Spergel, T.Yamada, N.Yasuda, … non-scientific E.Turner, Y.Suto, … …… Working group 1 Working group N Working group 2 Working group 3 HSC collaborators

  7. Today’s proposal(for HSC, not for SUMIRE) N-PAC council H.Karoji S.Miyazaki PI Advisory Council HSC Survey Design Committee H.Aihara, P.Ho, H.Murayama, D.Spergel, Y.Suto, E.Turner M.Chiba, J.Gunn, K.Shimasaku, M.Strauss, M.Takada, K.Umetsu …… Working group 1 Working group N Working group 2 Working group 3 HSC collaborators

  8. How to proceed next ? (Jan. 2009 version) • Aug. 2010: deadline of the Subaru strategic program proposal • Jun. 2010: HSC proposal 1st draft completed and circulated among collaborators • Mar. 2010: Japan-Princeton-Taiwan HSC workshop @ Japan ? • Dec. 2009: draft of HSC survey circulated among collaborators • Nov. 2009: HSC workshop @ Princeton • Mar. 2009: 3rd HSC workshop (in Japanese) @ NAOJ or Univ. of Tokyo

  9. How to proceed next ? • Dec. 2013: 1st world-top result from HSC as part of SUMIRE project • XXX.2012: start HSC survey • Aug. 2011: deadline of the Subaru strategic program proposal • XXX. 2011: HSC proposal 1st draft completed and circulated among collaborators • XXX.2010: Japan-Princeton-Taiwan HSC workshop @ Japan ? • Nov. 2009: HSC workshop @ Princeton

  10. Summary of discussion on Sept. 25 at The University of Tokyo • According to the draft of HSC white paper, the number of requested nights of wide, deep and ultra-deep surveys is 600. • Somehow we have to reduce it by 50% (?) • It is non trivial at al. • Possibilities include • Cut each of these surveys by a factor of two. • Drop one (or even two !) of the survey plans, and adjust the number of nights among the rest of the plans • Something in-between the above two, by cutting each of the surveys by a factor depending on the strength of their scientific case. The factors may be adapted after a few years of the survey, depending on its achievements.

  11. Purpose of today’s discussion • The latest number of requested nights for each survey (wide, deep, and ultra-deep) • Presentation by each survey group • Agreement on the decision making procedure • Discussion today and tomorrow • Final decision; who and how ? • other collaboration issues

  12. Summary of requested nights • Wide • 1500 deg2 159 nights (w/o weather factor) • 1000 deg2106 nights • Deep • 79 nights (w/o weather factor) • Ultra-deep • 69 nights (w/o weather factor) • Max number of nights: 210 (w/o weather factor) • Ratio: (159+79+69)/210=307/210=1.46 • On average, 210/307=0.68 reduction

  13. Comparison: Nov.11 vs. Nov.12 • Wide • 1500 deg2 159 nights ⇒ 1000 deg2106 nights • Deep • 79 nights ⇒ 43 nights • Ultra-deep • 69 nights ⇒ 60 nights • Max number of nights: 210 (w/o weather factor) • Wide: deep: ultra-deep = 50: 20: 30

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