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Validation of N1 Light Curves of the Initial Run (AN1_STAR product, IRa01) F. Baudin, E. Michel

Validation of N1 Light Curves of the Initial Run (AN1_STAR product, IRa01) F. Baudin, E. Michel. Specifications (COR-SP-0-83-PROJ ). Duty cycle: 90% during 5 days, 80% on a run Noise level: 0.6 ppm between 0.1 and 10 mHz in 5 days for a (mV=5.7) star and photon-noise limited up to mV=9.

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Validation of N1 Light Curves of the Initial Run (AN1_STAR product, IRa01) F. Baudin, E. Michel

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  1. Validation of N1 Light Curves of the Initial Run (AN1_STAR product, IRa01) F. Baudin, E. Michel

  2. Specifications (COR-SP-0-83-PROJ ) • Duty cycle: 90% during 5 days, 80% on a run • Noise level: 0.6 ppm between 0.1 and 10 mHz in 5 days for a (mV=5.7) star and photon-noise limited up to mV=9. • Polluted frequency range (orbital perturbations): <10% between 0.1 and 1 mHz

  3. IRa01 • duration: ≈60 days, • from end of January to Beginning of April • 10 stars observed

  4. Some examples

  5. Some examples

  6. Some examples

  7. Some examples

  8. Some examples

  9. Duty cycle (whole run)

  10. Duty cycle Gaps (sec) Without recovering SAA events (fine filtering, imagette photometry)

  11. Noise level Noise level / photon noise level Measured at: 0.1mHz (over 20 mHz) 6 mHz (over 1mHz)

  12. Noise level

  13. Orbital peaks Method: if P(forbit) > 2P(local background) then 5 bins x 3 declared polluted.

  14. Orbital peaks Mv = 9.5 !!!

  15. Orbital peaks

  16. Orbital peaks

  17. N1 data / Specifications Conclusions (1) • Duty cycle: 90% during 5 days, 80% on a run • OK DC≈89.5% (but SAA gaps dominant problem, improvement at N2?) • Noise level • - photon-noise limited between 0.1 and 10mHz up to mV=9: • OK at high freq (6mHz): <N>/<Nphot> ≈1.5 up to mV=9 • at 100mHz: dominated by stellar signal in most cases, down to <N>/<Nphot> ~ 2-10 several times • - N = 0.6 ppm in 5 days for a (mV=5.7) star: • OK N = 0.55+-0.1 on mV=5.7 (ID20), according to measurement at 6mHz

  18. N1 data / Specifications Conclusions (2) • Polluted frequency range(orbital perturbations): • <10% between 0.1 and 1 mHz: • OK< 1% on [0.1, 1mHz] • OK%on [0.1,10mHz] • Remark: sometimes, observed harmonics of the orbital until 10 mHz (n=60!!!)

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