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 2018-11-13 PAIB 53 in 2.72 hrs 3504

Detrend Parameters

AIRMASS,AIRMASS CORRECTION FUNCTION

Secondary Observers

MOBS

Priors

Period=1.8053663 +/- 1.5e-06,Rp/R*=0.1472 +/- 0.0011,a/R*=7.11 +/- 0.48,inc=87.5 +/- 1.6,ecc=0.0,u0=1.563 +/- 0.011,u1=-2.699 +/- 0.047,u2=3.363 +/- 0.063,u3=-1.227 +/- 0.027

Results

Tc=2458435.7499 +/- 0.004,Rp/R*=0.154 +/- 0.014,a/R*=6.23 +/- 0.41,Am1=1.037 +/- 0.02,Am2=-0.023 +/- 0.044
Details Qatar-4 Qatar-4 b 2020-11-15 PAIB 83 in 4.22 hrs 3522

Detrend Parameters

AIRMASS,AIRMASS CORRECTION FUNCTION

Secondary Observers

MOBS

Priors

Period=1.8053663 +/- 1.5e-06,Rp/R*=0.1472 +/- 0.0011,a/R*=7.11 +/- 0.48,inc=87.5 +/- 1.6,ecc=0.0,u0=1.563 +/- 0.011,u1=-2.699 +/- 0.047,u2=3.363 +/- 0.063,u3=-1.227 +/- 0.027

Results

Tc=2459168.72 +/- 0.01,Rp/R*=0.169 +/- 0.024,a/R*=6.44 +/- 2.46,Am1=1.011 +/- 0.03,Am2=-0.001 +/- 0.049