Speaker
Description
SPHEREx is in the process of surveying the full sky every six months in 102 spectro-photometric bands from 0.75 to 5 micrometers. This will allow SPHEREx to measure redshifts for about 500 million galaxies out to about z < 4. The unprecedentedly large volume is forecast to allow measurement of local non-Gaussianity with statistical uncertainty below order unity. For the main part of the talk I will introduce SPHEREx, and it's status after one year of observation. In the second part of the talk I will go into some of the analysis techniques we are developing for SPHEREx, especially the spherical-Fourier-Bessel (SFB) power spectrum that incorporates all wide- and first-order GR effects and does not need an effective redshift approximation, as well as our new in-progress technique to calculate the window convolution matrix, wide-angle effects, and integral constraint for the galaxy power spectrum and bispectrum. I will also highlight some of the systematics challenges associated with the measurement.