About

Benjamin Williams is a Research Professor in the Department of Astronomy at the University of Washington. His research focuses on galaxy evolution and stellar evolution through observations of nearby galaxies. He is heavily involved in surveys using the Hubble Space Telescope, Chandra X-ray Observatory, and XMM-Newton to study galaxies within 10 Mpc. By resolving individual stars and X-ray sources in these galaxies with these observatories, he aims to understand how these galaxies have developed their current appearances. In Autumn 2023, he taught the course ASTR 576 A: Astronomy Colloquium.

Research topics

• Computer Science
• Physics
• Geography
• Remote sensing
• Optics
• Astronomy

Selected publications

• The JWST Resolved Stellar Populations Early Release Science Program. I. NIRCam Flux Calibration

  Research Notes of the AAS · 2022 · 64 citations

  Senior authorCorresponding
  • Computer Science
  • Physics
  • Astronomy

  Abstract We use globular cluster data from the Resolved Stellar Populations Early Release Science (ERS) program to validate the flux calibration for the Near Infrared Camera (NIRCam) on the James Webb Space Telescope. We find a significant flux offset between the eight short wavelength detectors, ranging from 1% to 23% (∼0.01–0.2 mag) that affects all NIRCam imaging observations. We deliver improved zero-points for the ERS filters and show that alternate zero-points derived by the community also improve the calibration significantly. We also find that the detector offsets appear to be time variable by up to at least 0.1 mag.

  DOI

Frequent coauthors

• Julianne J. Dalcanton

  Flatiron Health (United States)

  288 shared

• Andrew E. Dolphin

  190 shared

• Daniel R. Weisz

  University of California, Berkeley

  159 shared

• Karoline M. Gilbert

  Space Telescope Science Institute

  131 shared

• Evan D. Skillman

  128 shared

• Anil C. Seth

  91 shared

• L. Clifton Johnson

  72 shared

• Puragra Guhathakurta

  71 shared

Similar researchers at University of Washington

• Sarah Jaewon Leeh-151
• Jan Hansenh-130
• Linda Simonsenh-120
• Anna Waldh-119
• Jesse Bloomh-117