Webb Found A Supernova Hubble Didn’t See

NASA’s Webb telescope has found its first supernova ever. Hubble didn’t see this.

Abstract

We report on the discovery of an infrared transient from NIRCam images taken by the James Webb Space Telescope on MJD 59752.362583, [Finkelstein et. al, ERS 1345]. We detect a new point source located at RA:14:19:30.01 DEC:+52:51:59.9 after comparing and subtracting archival Hubble Space Telescope ACS images taken in F814W on MJD 55858.193150 from the JWST NIRCam images, confirming the transient nature of the source. Based on a redshift of z = 0.284 (Willner et al. 2017, 756, 72), these measurements correspond to an absolute magnitude of about -16.0 in F200W and about -15.5 in F444W, suggesting the transient could be a supernova post-peak.

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