Credits and scientific sources

This is an independent NASA Space Apps project. NASA, SPHEREx and the catalogue/software teams below did not certify or endorse our derived measurements or interpretations.

Mission data and archive

• NASA SPHEREx mission and Science Data Center: calibrated spectral images, uncertainty/quality information, wavelength and ePSF products.
• NASA/IPAC Infrared Science Archive (IRSA): data access, archive services and documentation.
• Official SPHEREx cutout tutorial: community retrieval example linked by our notebook.
• IRSA spectrophotometry guide: point-source and extended-profile context. Our experimental galaxy fit is not an official IRSA pipeline product.

Catalogue and image inputs

• DESI Legacy Imaging Surveys DR9: adopted optical target positions, catalogue morphology and neighbour entries for the galaxy pilot; optical viewer cutouts. Survey acknowledgements.
• ESA Gaia DR3: public stellar-position overlays and earlier astrometric diagnostics. Gaia brightnesses are not substituted into the galaxy measurements.
• WISE/AllWISE: optional catalogue-position overlay.
• CDS Sesame/SIMBAD: resolution of named challenge targets. Fixed catalogue coordinates are not automatically an epoch-propagated source track.
• Euclid and HSC/HEROES morphology were investigated in earlier research. They are not the adopted baseline shapes for the measurements in this notebook.

Methods and software

• The Tractor: catalogue profile and ellipse conventions used to interpret Legacy models. We do not imply that the whole pipeline runs The Tractor.
• Astropy and Photutils: FITS, sky coordinates/WCS and ePSF/profile tools.
• NumPy, SciPy, Matplotlib, Pillow, Jupyter, Python and SQLite: numerical processing, plots, previews, notebooks and metadata storage. Original projects retain their respective licenses.
• EAZY (Brammer, van Dokkum & Coppi, 2008): referenced as a proposed spectral-fitting benchmark; it has not been run or validated as a real-galaxy redshift result here.

Project work and attribution boundaries

The project contributes the viewer, evidence export, notebook assembly, processing orchestration and explicitly labelled experimental diagnostics. Development used OpenAI Codex assistance. Project authors/contributors should be recorded in the repository when it is published; no GitHub URL or authorship is invented here.

Every derived result should retain source observation identifiers, release, processing recipe and caveats. No validated galaxy redshift, absolute-brightness accuracy, chemical abundance, habitability or discovery is claimed by these credits.