Roman Supernova Cosmology

Project Infrastructure Team

Building a pixel to cosmology pipeline for the Roman community and beyond.

Dark Energy Expansion

The Future of Cosmology with Roman

The Nancy Grace Roman Space Telescope (Roman) is NASA’s next large flagship mission, due for launch in fall 2026. One of the mission’s key objectives is to determine the expansion history of the universe and to test possible explanations for its apparent acceleration, including dark energy and modifications to general relativity. To achieve this goal, the mission will conduct a generation-defining experiment in time-domain astronomy via a Core Community survey called the High Latitude Time Domain Survey (HLTDS). This survey will enable the discovery and measurements of Type Ia Supernovae (SNe Ia), one of the most mature cosmological probes, up to redshifts of z ≈ 3 and with unparalleled precision and statistical volume.

Combining our knowledge of the Roman instrumentation with our expertise on SN Ia and cosmology, our team will formulate a “pixel-to-cosmology” framework, which will enable the precision required to fully utilize SNe Ia as cosmological probes, and therefore constrain the true nature of dark energy. This framework will deliver pixel-level improvements for calibration, pipelines for light-curve and prism-spectral extraction, precision scene-modeling catalogs, SNe Ia standardization software, transient alerts, and basic HLTDS optimization tools.

Our Deliverables

Meet the Team

  • Rebekah Hounsell

    Rebekah Hounsell

    Co-PI @ UMBC/NASA GSFC

    Project Manager

  • Ben Rose

    Ben Rose

    Co-PI @ Baylor

    Chief of Software and Computing

  • David Rubin

    David Rubin

    Co-PI @ UHM

    Pipeline Science Lead

  • Dan Scolnic

    Dan Scolnic

    Co-PI @ Duke

    Financial Lead

  • Diane Markoff

    Diane Markoff

    Co-I @ NCCU

    Executive Board

    Publication Committee Member

  • Rick Kessler

    Rick Kessler

    Co-I @ KICP

    Pipeline Development Manager for Simulations & Characterization

  • Rob Knop

    Rob Knop

    Co-I @ LBL

    Pipeline Development Manager for the Database and Observational Strategies

  • Russell Ryan

    Russell Ryan

    Co-I @ STScI

    Pipeline Development Manager for Spectroscopy

    Executive Board

  • Michael Wood-Vasey

    Michael Wood-Vasey

    Co-I @ UPitt

    Lead Pipeline Development Manager for Calibrations & Photometry

  • Masao Sako

    Masao Sako

    Co-I @ UPenn

    Photometry co-lead

    Executive Board

  • Charlotte Wood

    Charlotte Wood

    CoIlaborator @ NC A&T

    Ombudsperson

  • Justin Pierel

    Justin Pierel

    Collaborator @ STScI / NASA GSFC

  • Lauren Aldoroty

    Lauren Aldoroty

    Co-I @ Duke

    Photometry co-lead

  • Stefano Casertano

    Stefano Casertano

    Co-I STScI

    Calibration co-lead

  • Susana Deustua

    Susana Deustua

    Co-I @ NIST

    Calibration co-lead

    Executive Board Member

    Publication Committee Chair

  • Lou Strolger

    Lou Strolger

    Collaborator @ STScI

    Ombudsperson

  • Bhavin Joshi

    Bhavin Joshi

    Co-I @ STScI

    Spectroscopy lead

  • Ann Isaacs

    Ann Isaacs

    Co-I @ UMN

  • Aleksandar Cikota

    Aleksandar Cikota

    Collaborator @ NOIRLab

  • Adam Riess

    Adam Riess

    Collaborator @ JHU

  • Tri Astraatmadja

    Tri Astraatmadja

    Co-I @ STScI

  • Megan Sosey

    Megan Sosey

    Co-I @ STScI

    Chief Software Architect

    Executive Board

  • Nao Suzuki

    Nao Suzuki

    Collaborator @ LBL

  • Peter Nugent

    Peter Nugent

    Collaborator @ LBL

  • Sebastian Gomez

    Sebastian Gomez

    Collaborator @ STScI

  • Vivian Miranda

    Vivian Miranda

    Co-I @ Stony Brook

    Cosmology lead

  • Greg Aldering

    Greg Aldering

    Collaborator @ LBL

  • Andy Fruchter

    Andy Fruchter

    Collaborator @ STScI

  • Peter Garnavich

    Peter Garnavich

    Collaborator @ Notre Dame

  • Dillon Brout

    Dillon Brout

    Co-I @ Boston

  • Dave Jones

    Dave Jones

    Co-I @ IfA

    Characterization co-lead

  • Lluis Galbany

    Lluis Galbany

    Collaborator @ ICE-CSIC

  • Schuyler Van Dyk

    Schuyler Van Dyk

    Collaborator @ IPAC

    Contact for RAPID Team

  • Saurabh Jha

    Saurabh Jha

    Collaborator @ Rutgers

    Ombudsperson

  • Charles Baltay

    Charles Baltay

    Co-I @ Yale

  • Brad Cenko

    Brad Cenko

    Collaborator @ NASA GSFC

  • Tyler Pritchard

    Tyler Pritchard

    Collaborator @ UMCP / NASA GSFC

  • Saul Perlmutter

    Saul Perlmutter

    Co-I @ LBL

  • Joshua Frieman

    Joshua Frieman

    Collaborator @ UChicago

  • Patrick Kelly

    Patrick Kelly

    Co-I @ UMN

  • Michael Troxel

    Michael Troxel

    Co-I Duke

  • Lei Hu

    Co-I @ UPenn

  • Cole Meldorf

    Cole Meldorf

    Co-I @ UPenn

  • Massimo Griggio

    Massimo Griggio

    Co-I @ STScI

  • James DerKacy

    James DerKacy

    Co-I @ STScI

  • Mi Dai

    Mi Dai

    Co-I @ UPitt

  • Jillian Paulin

    Jillian Paulin

    Co-I @ UPenn

  • Maria Acevedo

    Maria Acevedo

    Collaborator @ Duke

  • Chris Hernandez

    Chris Hernandez

    Co-I @ UPitt

  • Rujuta Purohit

    Rujuta Purohit

    Co-I @ BU

  • Bharath Nagam

    Bharath Nagam

    Co-I @ UMN

  • Hallie Fausey

    Hallie Fausey

    Co-I @ Baylor

    co-lead Characterization

  • Anousha Greiveldinger

    Anousha Greiveldinger

    Co-I @ UCB

  • Jyotika Roychowdhury

    Jyotika Roychowdhury

    Co-I @ Duke

  • Kene Anumba

    Kene Anumba

    Co-I @ Duke

  • Arun Kannawadi

    Arun Kannawadi

    Collaborator @ Duke

  • Samuel Hinton

    Samuel Hinton

    Co-I @ UCB

  • Patrick Armstrong

    Patrick Armstrong

    Co-I @ UCB

  • Alexandra Walker

    Alexandra Walker

    Co-I @ UPenn

  • Nykesha Fyffe

    Nykesha Fyffe

    Grants & Contracts Administrator @ Duke

Contact Us

If you want to learn more about our team, pipeline, products, or have questions related to our work please feel reach out via this contact form.