SNAP Calibration Review

Background

The SNAP project 

The determination of dark energy properties is the science goal of the
Supernova Acceleration Probe (SNAP) project.  SNAP proposes to investigate the
dark energy by going beyond a constant equation of state to the dynamical
variation of dark energy, and testing the geometry (flatness) and gravity
beyond Einstein.  This will be accomplished through a comprehensive supernovae
(Type Ia) survey and a weak gravitational lensing survey, using a multi-color,
wide-field imaging program.  The SNe Ia will also be observed spectroscopic
ally.  This science demands high precision and accuracy, placing stringent
requirements on calibration, particularly on the absolute color calibration of
the SNe Ia.  The overall calibration – spectrophotometric, photometric, and
astrometric -- for the SNAP focal plane will be conducted through several
routes. 


Requirements

Since the absolute color calibration of SNe Ia is the most stringent, as it
directly affects the uncertainties in the determination of the dark energy
parameters, its requirements drive the calibration program

To derive the constant and time-varying components of the dark energy equation
of state to X in wo and to Y in wa, the requirements on the color calibration
are 2%, with 1.4% for the in band flux.


Charge
The review panel is asked to carry out an integrated examination of each
calibration component, with particular attention to the technical plans and
progress overall, and the cost, schedule and management planning of the
Calibration program.  In addition, the Committee is asked to advise on
maximizing the effectiveness of the current program. Review team members are
drawn from the SNAP collaboration and from the astronomical community

The review panel will provide input in the form of technical and scientific
findings to the SNAP Calibration Group on these topics: 

Are the calibration requirements well defined?

Is the calibration plan well defined?

Is the plan likely to meet the calibration requirements?

Are the activities in the key areas of calibration appropriate?  Are there any
significant risks that are not being adequately addressed?

What is missing from the calibration plan?

Are we making adequate technical and schedule progress?

Is the distribution of man power appropriate for the work?

Are the allocated resource levels appropriate?