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Werner, Molly Kosiarek, Motohide Tamura, Rachel Akeson, Teruyuki Hirano, Varoujan Gorjian","submitted_at":"2019-01-17T15:42:50Z","abstract_excerpt":"We present precision 4.5 $\\mu$m Spitzer transit photometry of eight planet candidates discovered by the K2 mission: K2-52 b, K2-53 b, EPIC 205084841.01, K2-289 b, K2-174 b, K2-87 b, K2-90 b, and K2-124 b. The sample includes four sub-Neptunes and two sub-Saturns, with radii between 2.6 and 18 $R_\\oplus$, and equilibrium temperatures between 440 and 2000 K. 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