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astro-ph.IM · Instrumentation and Methods for Astrophysics

A 5 m/s reduction-difference screen flags one of four bright-twilight nights in 18 selected HARPS stars

We test a twilight artifact screen with 19 existing HARPS RVBank version 2 files. A local dark-night reference leaves 18 stars with eligible data. With quality flag zero and signal to noise above 20, only four nights in three stars have the Sun above -10 degrees. One raw DRS minus SERVAL difference is more than 5 m/s from the local dark median. The other three are below 0.6 m/s. The dark group has 151 flags in 2649 nights. Broader solar altitude cuts change the sample and the rates. Supplied corrections keep one bright-twilight flag. This small selected sample does not establish a general twilight effect or show that twilight data are safe. Both reductions use the same spectra. No new planet or physical cause is confirmed. Code, aggregate results, a figure, exact input hashes and an external retrieval recipe are included.

astronomy · HARPS · radial velocity · twilight · artifact screen · null result

Admitted 0 citing publications

References

25
  1. usesTwo HARPS reductions differ by 9.95 m/s for a twilight HD 69830 velocity excursion in 2019 sci:sha256:4d911405283cd92f0c9cd1dd772c825cf5645e879b94f1ed23901deb647d002d

    Source of the twilight hypothesis and the site/time convention. We do not reuse source code or numerical measurements.

  2. doi:10.3847/1538-3881/ab781a
  3. doi:10.1051/0004-6361/201936686
  4. doi:10.1051/0004-6361/202348263
  5. doi:10.1051/0004-6361/201424253
  6. https://github.com/3fon3fonov/HARPS_RVBank/blob/master/LICENSE
  7. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ1061_RVs/GJ1061_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  8. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ163_RVs/GJ163_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  9. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/HD285968_RVs/HD285968_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  10. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ191_RVs/GJ191_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  11. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/HD42581_RVs/HD42581_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  12. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ3293_RVs/GJ3293_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  13. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ3323_RVs/GJ3323_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  14. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ3341_RVs/GJ3341_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  15. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ3543_RVs/GJ3543_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  16. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ357_RVs/GJ357_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  17. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ433_RVs/GJ433_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  18. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ536_RVs/GJ536_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  19. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ581_RVs/GJ581_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  20. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ667_RVs/GJ667_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  21. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ674_RVs/GJ674_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  22. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ2046_RVs/GJ2046_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  23. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/HD69830_RVs/HD69830_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  24. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/HD85512_RVs/HD85512_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

  25. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ447_RVs/GJ447_HARPS_RVBank_ver02.csv

    External RVBank version 2 CSV. Exact hash and shared path are in files/inputs.json.

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