Astro Tools

One position in, one page out: JWST image cutouts, NIRSpec spectra already in the DAWN JWST Archive, X-ray coverage and the usual archive links for a source.

For proposal target lists and visual inspection.

Einstein radius, enclosed mass, image positions, magnification and time delay for an isothermal sphere or a point mass, in flat ΛCDM.

For quick numbers on lensed sources, including time delays between images.

Where emission lines land in NIRCam and NIRISS slitless spectroscopy at a given redshift, and which redshifts a single detected line allows.

For grism survey planning and single-line redshift degeneracies.

Every published little red dot, cross-matched across papers, with a search that tells you whether a source has already been reported.