Observations

I am involved with observations from our largest telescopes in space and on the ground.

I am a member of the Brightest of Reionizing Galaxies (BoRG) Survey which searches for bright galaxy candidates at z > 8 in Hubble Space Telescope (HST) imaging, and the Grism Lens-Amplified Survey from Space (GLASS), a HST spectroscopic survey of high-redshift galaxies lensed by clusters. We followed up GLASS targets in the KLASS survey with VLT/KMOS and at Keck.

The James Webb Space Telescope (JWST) is expanding our frontier to the earliest galaxies. Some of the surveys I’ve been most heavily involved in are:

• The JWST Early Release Science program GLASS which surveyed the Frontier Fields galaxy cluster Abell 2744 (PI: Treu)
• A Cycle 2 program to test the existence of one of the first reionized bubbles in the universe (coPIs: Mason & Stark)
• The NIRCam pure-parallel survey BEACON, which provides an ‘unbiased’ view of the high-redshift universe by sampling many independent sightlines (Co-PIs: Morishita, Mason, Trenti & Treu)
• SPURS, an ultra-deep 200 hr spectroscopy survey aiming to understand physical conditions in the first galaxies and constrain the earliest stages of reionization (Co-PIs: Mason & Stark)