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 2020-01-15 SMAMA 14 in 4.02 hrs 3015

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=-2.698 +/- 0.047,u2=3.36 +/- 0.063,u3=-1.226 +/- 0.027

Results

Tc=2458863.649 +/- 0.023,Rp/R*=0.178 +/- 0.054,a/R*=5.34 +/- 4.15,Am1=0.258 +/- 0.099,Am2=1.04 +/- 0.34
Details Qatar-4 Qatar-4 b 2020-09-18 SMAMA 65 in 3.39 hrs 4326

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=2459110.9293 +/- 0.009,Rp/R*=0.183 +/- 0.025,a/R*=14.21 +/- 2.27,Am1=0.995 +/- 0.031,Am2=0.005 +/- 0.029
Details Qatar-4 Qatar-4 b 2021-07-13 SMAMA 2 in 2.15 hrs 4568

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=2459408.803 +/- 0.032,Rp/R*=0.166 +/- 0.053,a/R*=12.13 +/- 4.1,Am1=0.86077 +/- 0.00046,Am2=0.1 +/- 0.12