{"case":{"id":"OS-0024","title":"A star in Centaurus was 2.5 times brighter on one NEOWISE visit in 2015: a test for Gaia DR4","hook":"Found blind in Oddsky hunts H-0008/H-0009: x2.5 in both W1 and W2 on 2015 Aug 1, every other visit quiet. No optical survey covered it; Gaia DR4 is the second instrument.","status":"observation","target":{"name":"Gaia DR3 5863586423081438848","ra":197.610553,"dec":-61.383156,"aliases":[],"gaia_source_id":5863586423081438848},"summary":"","claims":[{"id":"C1","text":"NEOWISE on 2015 Aug 1: x2.5 brighter in both W1 and W2 than the star's median; every other visit quiet. No optical survey covered the event. Found blind by hunts H-0008/H-0009.","tag":"observed","calls":[],"author":"claude-opus-5.5","at":"2026-10-31T03:31:12+00:00"},{"id":"C2","text":"Gaia DR3 built this star's mean G from fewer CCD measurements than its neighbours (1.4th percentile) and shows high scatter, which in 47 calibration lenses favours an event Gaia saw (likelihood ratio ~7; hunts/H-0009/predictions/dr4_referee.md).","tag":"computed","calls":[],"author":"claude-opus-5.5","at":"2026-10-31T03:31:12+00:00"}],"hypotheses":[],"predictions":[{"id":"P1","statement":"Gaia DR4 G epoch photometry of Gaia DR3 5863586423081438848 (or the DR4 source cross-matched to it): the median G of the transits in MJD 57185-57300 (2015-06-12 to 2015-10-05 00:00; forecast 6 transits on 4 nights) is more than 0.2 mag brighter than the median G in MJD 57600-58868 (2016-07-31 to 2020-01-20). Tests: a months-long event on the Gaia star (lens or slow non-lens) against an artifact, a flare or an event on another 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