CONAN.models.TTV_Model

CONAN.models.TTV_Model#

CONAN.models.TTV_Model(tarr, rho_star=None, dur=None, T0_list=None, RpRs=None, b=None, per=None, sesinw=[0], secosw=[0], ddf=0, occ=0, Fn=None, delta=None, A_ev=0, f1_ev=0, A_db=0, q1=0, q2=0, split_conf=None, ss=None, vcont=0, Rstar=None, grprs=0, custom_LCfunc=None, cst_pars={})#

computes the TTV model for a given set of parameters along with the baseline

Parameters:

  • tarr (array-like) – The timestamps of the lightcurve

  • rho_star (float) – Stellar density [g/cm^3]

  • dur (float) – Duration of the transit [days]

  • T0_list (list) – transit times in each chunk of the data

  • RpRs (list) – Planet-to-star radius ratio

  • b (list) – Impact parameter

  • per (list) – Orbital period [days]

  • sesinw (list) – sqrt(ecc)*sin(omega)

  • secosw (list) – sqrt(ecc)*cos(omega)

  • ddf (float) – if ddf is not 0, then depth variation is being used and this value is added to the base rprs, gr

  • occ (float) – Occultation depth in ppm

  • Fn (float) – nightside flux ratio in ppm

  • delta (float) – hotspot shift of the atmospheric variation in degrees

  • A_ev (float) – semi-Amplitude of the ellipsoidal variation in ppm

  • f1_ev (float;) – fractional constant of the EV model

  • A_db (float) – semi-Amplitude of the Doppler boosting in ppm

  • q1 (float) – LD coefficient 1

  • q2 (float) – LD coefficient 2

  • split_conf (SimpleNamespace) – The configuration for the split data

  • ss (SimpleNamespace) – The configuration for the supersampling

  • vcont (float) – contamination factor

  • Rstar (float) – Stellar radius in Rsun. used to calculate light travel time correction. Default: None to not perform light travel time correction

  • custom_LCfunc (SimpleNamespace) – object containing the custom light curve function to be added to the model. Default: None

  • cst_pars (dict) – additional parameters for the custom light curve function. Default: {}

Returns:

  • mm (array-like) – The lightcurve model for the given parameters

  • model_components (dict) – The components of the model for each planet in a system

Examples

>>> from CONAN.models import TTV_Model
>>> from CONAN.utils import split_transits
>>> import numpy as np
>>> spt = split_transits(t, P=[0.9414526], t_ref=[1375.1698], flux=f)
>>> trans_mod,_ = TTV_Model(t, rho_star = rho_star, T0=spt.t0_list, RpRs=[RpRs], b =[b],
>>>                         per=[per], sesinw=sesinw, secosw=secosw, q1=q1, q2=q2, split_conf=spt)
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