I am passionate about spectroscopy-- especially UV spectroscopy-- and advocating for the future of UV astronomy.

JWST/NIRISS Instrumentation

I joined the NIRISS team in 2018 and primarily work on the WFSS (Wide Field Slitless Spectroscopy) team, the imaging team, and the JWST calibration pipeline. I am currently working on updating the WFSS trace calibration.

During JWST commissioning, I was involved in the creation of detector flats, WFSS wavelength calibration, characterization and analysis of detector features (stray light, ghosts, anomalous diffraction spikes), and general data inspection and verification.

I am also passionate about creating fully functional, well-written, standardized code using modern tools. Through my leadership, the NIRISS team has begun utilizing the full capability of git version control systems to maintain commissioning, pipeline, and calibration software.

ULLYSES

See the ULLYSES PASP paper (Roman-Duval 2025).

HST's Ultraviolet Legacy Library of Young Stars as Essential Standards (ULLYSES) is a Director's Discretionary program of approximately 1,000 orbits that produced an ultraviolet spectroscopic library of young high- and low-mass stars in the local universe.

From 2020 - 2024, I led the ULLYSES Data Products (DP) team which was responsible for all technical aspects of the production, dissemination, and management of ULLYSES data. This includes creating high-level science products, maintaining the ULLYSES website, producing visualization and analysis software, and ensuring intuitive data access for the scientific community.

I was a member of the Science Organizing Committee for STScI's ULLYSES workshop in 2024.

HST/COS Instrumentation

As a member of the COS team for 6 years, I have extensive experience with XDL and MAMA detectors. Many of my projects have required detailed treatment of calibration to produce high quality scientific products. I have contributed to and tested the COS calibration software pipeline. Some notable COS projects I have contributed to:

• COSMo (COS Monitoring)
• Lifetime position planning and calibration
• Calibration algorithm testing
• Calibration pipeline update management
• Generating FUV LSFs with Code V
• NUV Time-Dependent Sensitivity (TDS) monitoring

HST/STIS Instrumentation

While a member of the STIS team for 4 years, I was the PI of several calibration programs and contributed to STIS calibration pipeline testing.

I have also been involved in multiple research projects that required detailed treatment of STIS long-slit spectra. In particular, I have developed custom calibration pipelines to address the following issues: custom DQ and hot pixel flagging, iterative fringe correction in NIR spectra, spectral extraction in crowded fields, and herringbone pattern correction.