Recovery of Spectra of Phosphine in Venus' Clouds

  title={Recovery of Spectra of Phosphine in Venus' Clouds},
  author={Jane Greaves and Anita M. S. Richards and William Bains and Paul B. Rimmer and David L. Clements and Sara Seager and Janusz Jurand Petkowski and Clara Sousa-Silva and Sukrit Ranjan and Helen J. Fraser},
We recover PH3 in the atmosphere of Venus in data taken with ALMA, using three different calibration methods. The whole-planet signal is recovered with 5.4σ confidence using Venus bandpass self-calibration, and two simpler approaches are shown to yield example 4.54.8σ detections of the equatorial belt. Non-recovery by Villanueva et al. is attributable to (a) including areas of the planet with high spectral-artefacts and (b) retaining all antenna baselines which raises the noise by a factor ~2.5… Expand
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