Published July 4, 2022 | Version v1
Journal article Open

(3200) Phaethon Polarimetry in the Negative Branch: New Evidence for the Anhydrous Nature of the DESTINY+ Target Asteroid

Authors/Creators

  • 1. Seoul National University
  • 2. University of Hyogo
  • 3. Chiba Institute of Technology
  • 4. Hiroshima University
  • 5. Kyoto University
  • 6. Japan Aerospace Exploration Agency
  • 7. Hokkaido University of Education
  • 8. The University of Tokyo
  • 9. Kyoto Sangyo University
  • 10. University of Helsinki
  • 11. Nordic Optical Telescope

Description

We report on the first polarimetric study of (3200) Phaethon, the target of JAXA's DESTINY+ mission, in the negative branch to ensure its anhydrous nature and to derive an accurate geometric albedo. We conducted observations at low phase angles (Sun-target-observer angle, \(\alpha=8.8-32.4^\circ\)) from 2021 October to 2022 January.

 

Here, we offer the polarimetric data (FITS files) taken by 1) the Hiroshima Optical and Near-InfraRed camera (HONIR; Akitaya et al. 2014) on the 1.5-m Kanata Telescope at the Higashi-Hiroshima Observatory, 2) the Wide Field Grism Spectrograph 2 (WFGS2; Kawakami et al. 2022) on the 2.0-m Nayuta telescope at the Nishi-Harima Astronomical Observatory, and 3) the Andalucia Faint Object Spectrograph and Camera (ALFOSC) with the FAPOL polarimeter on the 2.56-m Nordic Optical Telescope at the Observatorio del Roque de Los Muchachos, La Palma. All data is preprocessed (i.e., bias, dark and flat corrections are done). 

 

Please contact Jooyeon Geem (geem@astro.snu.ac.kr) or Masateru Ishiguro (ishiguro@snu.ac.kr), if you have any questions. 

Notes

The data are preprocessed (i.e., bias, dark, flat correction).

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