NGC 6505

A gravitational lens was discovered by Euclid Archive Scientist Bruno Altieri in data from ESA's Euclid telescope. The researchers therefore suggest the nickname "Altieri's lens". The discovery was made with early testing data from September 2023, which was out of focus. Later Euclid imaged the galaxy and the lensed galaxy with both the VIS and NIS instruments. The lens was also observed with resolved spectroscopy of the Keck Cosmic Web Imager (KCWI) and the Dark Energy Spectroscopic Instrument (DESI). The lensed galaxy has a redshift of 0.4058 ± 0.003, equivalent to a distance of 4.46 billion light-years. The discoverers called the discovery an "exceptionally rare strong lens" and the first gravitational lens found in any NGC galaxy. == See also ==