AAVSO: American Association of Variable Star Observers

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Star Exoplanet Observation Date Primary Observer Measurements reference
Details Qatar 4 Qatar-4 b 2020-11-15 LPAC 184 in 3.52 hrs 720

Detrend Parameters

AIRMASS,AIRMASS CORRECTION FUNCTION

Secondary Observers

Priors

Period=1.8053704 +/- 4.2e-06,a/R*=7.11 +/- 0.48,inc=87.5 +/- 1.6,ecc=0.0,u0=2.21 +/- 0.05,u1=-3.94 +/- 0.2,u2=4.22 +/- 0.26,u3=-1.49 +/- 0.11

Results

Tc=2459168.7256 +/- 0.0024,Rp/R*=0.1415 +/- 0.0093,Am1=0.943 +/- 0.042,Am2=0.056 +/- 0.042
Details Qatar 4 Qatar-4b 2020-11-15 LPAC 184 in 3.52 hrs 721

Detrend Parameters

AIRMASS,AIRMASS CORRECTION FUNCTION

Secondary Observers

Priors

Period=1.8053704 +/- 4.2e-06,a/R*=7.11 +/- 0.48,inc=87.5 +/- 1.6,ecc=0.0,u0=2.21 +/- 0.05,u1=-3.94 +/- 0.2,u2=4.22 +/- 0.26,u3=-1.49 +/- 0.11

Results

Tc=2459168.7256 +/- 0.0024,Rp/R*=0.1415 +/- 0.0093,Am1=0.943 +/- 0.042,Am2=0.056 +/- 0.042
Details Qatar-4 Qatar-4 b 2022-07-09 LPAC 60 in 3.28 hrs 1663

Detrend Parameters

AIRMASS,AIRMASS CORRECTION FUNCTION

Secondary Observers

Priors

Period=1.8053646 +/- 6e-07,a/R*=7.11 +/- 0.48,inc=87.5 +/- 1.6,ecc=0.0,u0=2.215 +/- 0.019,u1=-3.886 +/- 0.075,u2=4.122 +/- 0.098,u3=-1.451 +/- 0.041

Results

Tc=2459769.915 +/- 0.0024,Rp/R*=0.149 +/- 0.018,a/R*=8.37 +/- 1.14,Am1=1.038 +/- 0.017,Am2=-0.028 +/- 0.017