Reaching for the stars -- JWST/NIRSpec spectroscopy of a lensed star candidate at z=4.76

We present JWST/NIRSpec observations of a highly magnified star candidate at a photometric redshift of z_{\mathrm{phot}}\simeq4.8, previously detected in JWST/NIRCam imaging of the strong lensing (SL) cluster MACS J0647+7015 (z=0.591). The spectroscopic observation allows us to precisely measure the redshift of the host arc at z_{\mathrm{spec}}=4.758\pm0.004, and the star's spectrum... Show more