NEXUS is located in the North Ecliptic Pole continuous-viewing zone, where deep space-based surveys and long-baseline multi-wavelength observations overlap. Together, these data connect JWST imaging and spectroscopy to a much wider view of galaxy evolution, active galactic nuclei, and time-domain phenomena.

Footprint

Schematic showing the SPHEREx North Deep Field and a detailed view of the nested EUDF, RXDF, and NEXUS footprints
Schematic footprint overview; relative placement is simplified and the two panels use different scales. Areas and dimensions are labeled for comparison.

Core Surveys

  • NEXUS — JWST NIRCam imaging and wide-field slitless spectroscopy across the approximately 400 arcmin² Wide tier, with NIRSpec MSA spectroscopy and deeper imaging in the approximately 50 arcmin² Deep tier.
  • Euclid Ultra-Deep Field (EUDF) — repeated VIS and NISP imaging and slitless spectroscopy in the central approximately 0.5°-radius region of Euclid’s North Ecliptic Pole self-calibration field.
  • Roman eXtreme Deep Field (RXDF) — an approved seven-band Roman survey covering more than 1,200 arcmin², including approximately 700 arcmin² at full depth. Its footprint encompasses NEXUS and extends into the surrounding EUDF.
  • SPHEREx North Deep Field — approximately 100 deg² of highly redundant 0.75–5 μm spectral mapping around the North Ecliptic Pole, providing a wide-field environmental and spectrophotometric context for NEXUS.

Additional Coverage

  • HEROES (Subaru HSC + CFHT) — deep optical imaging in the u and grizy bands across the NEXUS field.
  • eROSITA — repeated X-ray coverage of the North Ecliptic Pole for identifying and monitoring luminous active galactic nuclei.
  • WISE/NEOWISE — mid-infrared imaging and long-baseline time-domain information for bright sources in the field.
  • Wide Field Survey Telescope (WFST) — high-cadence optical monitoring that complements NEXUS variability and transient studies.
  • Young Supernova Experiment (YSE) — optical time-domain coverage supporting transient discovery and characterization.