Summary of Spitzer HzRG Telecon - 2005 February 2
-------------------------------------------------
Attending:  Daniel S., Carlos DeB., Brigitte RV., Nick S., Mark D.,
  Mark L., Andrew Z., Joel V., Bob F., Alessandro R. (not everyone was
  notified of this telecon; sorry if you felt left out - you aren't
  being left out of the Spitzer cycle 2 proposals)
 
 
Topic:  brief, 1st discussion of concrete plans for Spitzer Cycle 2
  proposals (which are due at 1pm, CA time, on Saturday Feb. 12th)
 
 
Consensus plan is to do 2 proposals:
  (1) MIPS 24um imaging of sources missed in our Cycle 1 program, where
      we used a sky background limit to choose which targets to observe
      with MIPS
  (2) IRS spectroscopy of 16um/24um selected sample of the Cycle 1 program
 
 [(3) also briefly discussed possible archive proposal to analyze GTO
      data on HzRGs, but decided to put efforts into getting new data
      for this cycle]

Since funds are cut by 50% if PI isn't in the US, decision was made to
have US PI's.  Latter (IRS) proposal, which will likely be a substantial
request, will probably have Nick as PI.  Former (MIPS) proposal apt to
be either Dan or Carlos as PI -- if #hours isn't large, the financial
penalty of a European PI is not as important.  Brigitte will play an
active role in IRS proposal, has already started a 1st draft, and will
play an important role in the analysis and publication of IRS data; she
is willing to step down as PI of the proposal for the financial reasons
(also, since IRS data is relatively new, analysis of data is apt to rely
heavily on close access to IRS team members at SSC, esp. Harry Teplitz).
 
 
More detailed comments on the proposals follow:
 
(1) MIPS 24um imaging proposal
==============================
- plan is to get 24um imaging of sources missed in cycle 1 program, which
  used a very stringent background limit to choose which targets to
  attempt with MIPS
- strict limit probably more relevant for longer wavelength MIPS channels.
  data thus far shows very high rate of 24um detections (11 out of 12
  obs'd thus far), while 70um and 160um detection rate is basically null
  (1 70um detection thus far)
- proposal would be a revamp of the cycle 1 proposal (DS/CDB to send out
  1st draft next M?)
- updated figures:
        - panel showing 24um detections for some (all?) of the hzrg
          imaging currently in hand (NS? CDB?)
        - plot of 24um flux/lum. vs. radio flux/power (CDB)
        - plot of radio power vs. redshift, indicating which sources
          are to be observed in cycle 1, and which we request here (CDB)
        - 4c23.56 SED (NS? CDB?)
 
 
(2) IRS spectroscopy proposal
=============================
- plan is get IRS spectra of HzRG's observed already in cycle 1 GO program
- study the rest-frame ~10um properties:  black-body rad'n from hot dust
  (as evidenced by Brigitte's ISO work), PAH emission, silicate
  absorption, and power-law AGN contribution
- AGN vs. star-formation?
- compare to MIPS-selected sources with recent IRS spectroscopy (esp. the
  optically-ft, mid-IR-bright sources; Yan et al., in prep.; IRS team, in
  prep.)
- goal will be to use PEGASE (3) models to analyze data
- we have ~12 targets right now (7 targets with 24um > 0.7 mJy; others
  selected based on IRS 16um flux)
- figures:
        - some results from cycle 1:  multi-panel plot of (subset
          of) data, showing IRAC, IRS, MIPS imaging and robust detections
          (CDB? NS?)
        - range of PEGASE models, showing hot-dust dominated spectrum and
          PAH dominated spectrum (BRV)
        - SED of 4c23.56 showing optical thru mid-IR (CDB? NS?), with
          model fit? (BRV?  AR?)
 
 
 
proposed AI's
=============
CDB - figures?
NS  - figures?
DS  - revise cycle1 proposal into cycle2 MIPS proposal
HT  - meet w/ NS,DS,ML to discuss IRS details -- target sel'n, IRS
      observing plan, input on science justification
BRV - will send out 1st draft of IRS proposal on friday (NS & DS observing
      that night at Palomar); NS & DS will work on proposal text over
      weekend and get draft out ~Monday
    - PEGASE model/prediction of IRS data, for range of models (or two
      extremes)