SNAP Spectrum Simulation: Spectra and Analysis

Details SNAP Spectrum Simulation: Spectra and Analysis SNAP Spectrum Simulation: Spectra and Analysis

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21113226y&link_type=abstract

American Astronomical Society, AAS Meeting #211, #132.26; Bulletin of the American Astronomical Society, Vol. 39, p.966

Physics

Optics

Scientific paper

We present results from the Supernova/Acceleration Probe (SNAP) spectrograph simulation framework. The SNAP spectrograph is an integral field slicer imager instrument with wavelength sensitivity of 0.9-1.7 μm and resolution () of 100. The spectrometer will simultaneously procure the spectra of Type Ia Supernovae and host galaxies. High S/N spectra will be used to measure redshifts (up to z 3) and various explosion properties of Supernovae. In addition, the spectrograph will calibrate the spectro-photometric measurements crucial to weak gravitational lensing survey.
We have integrated the standalone java-based spectrograph simulation, developed by A. Bonissent et al., with the SNAP simulation (SNAPSim) suite which is a parametric simulation tiered over a persistence-based framework. The integration required development and implementation of various interfaces along with several classes.
The integrated suite is capable of realistically simulating the entire end-to-end mission with 2000+ supernovae with high S/N spectra that include all the significant effects due to the universe through the instrument (optics, filters, detectors and respective noises). In addition, the modular design of the simulation allows for simulating other missions for comparative analyses. The simulation suite extends as an effective test-bed for the engineering specifications and various mission-critical trade studies.
We present results from the following studies,
1.
Fisher Analysis of Supernova Type Ia diversity using spectral decomposition using Principal Component Analysis (PCA).
2.
Spectral purity in the observed diverse population
3.
S/N benchmark
This is an on going effort.

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