Extended Data Fig. 2: Validation of the LHS 475 b. | Nature Astronomy

Extended Data Fig. 2: Validation of the LHS 475 b.

From: A JWST transmission spectrum of the nearby Earth-sized exoplanet LHS 475 b

Extended Data Fig. 2: Validation of the LHS 475 b.The alternative text for this image may have been generated using AI.

Left: A 3.36’ × 3.36’ DSS image centered on LHS 475 taken 1999 June 20. The red circle depicts the star’s J2000 position per Simbad, whereas the blue circle indicates the star’s position for the JWST observations in September of 2022. We see no indication of a background star at the 2022 position that could be the source of the observed transit signal. For reference, NIRSpec’s field of view is 1.6 × 1.6 pixels on this image. Right: Sensitivity curve of LHS 475 from a NIRSpec target acquisition image (upper right) spanning 1.6" × 1.6", using the SUB32 subarray and CLEAR filter. The sensitivity curve and visual inspection of the image show no contamination sources (down to Δmag=3) to within 0.1 arcsec, which corresponds to a distance of 1.25 AU.

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