lmfit/lmfit-py 1.0.1

Newville, Matt; Otten, Renee; Nelson, A.; Ingargiola, Antonino; Stensitzki, Till; Allan, Dan; Fox, Austin; Carter, Faustin; Michał,; Pustakhod, Dima; Ram, Yoav; Glenn,; Deil, C.; Stuermer,; Beelen, A.; Frost, O.; Zobrist, Nicholas; Mark, Mark; Pasquevich, G. A.; Hansen, Allan L. R.; Spillane, Tim; Caldwell, S.; Polloreno, Anthony; andrewhannum,; Fraine, Jonathan; -thought, deep; Maier, Benjamin; Gamari, Ben; Persaud, A.; Almarza, Anthony

doi:10.5281/zenodo.3814709

Cited by 27 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tabular data, celestial coordinates and time scales are handled using routines from the astropy 3 software package (The Astropy Collaboration et al 2018). The package lmfit 4 (Newville et al 2020) is used for non-linear least-squares minimization and parameter handling. For Bayesian data analysis techniques, we use the affine-invariant Markov chain Monte Carlo ensemble sampler by Goodman & Weare (2010) implemented in emcee 5 (Foreman-Mackey et al 2013) to generate samples from the posterior probability distribution.…”

Section: Implementation and Dependenciesmentioning

confidence: 99%

Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) usingpycheops

Maxted¹,

Ehrenreich²,

Wilson³

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

CHEOPS (CHaracterising ExOPlanet Satellite) is an ESA S-class mission that observes bright stars at high cadence from low-Earth orbit. The main aim of the mission is to characterize exoplanets that transit nearby stars using ultrahigh precision photometry. Here we report the analysis of transits observed by CHEOPS during its Early Science observing programme for four well-known exoplanets: GJ 436 b, HD 106315 b, HD 97658 b and GJ 1132 b. The analysis is done using pycheops, an open-source software package we have developed to easily and efficiently analyse CHEOPS light curve data using state-of-the-art techniques that are fully described herein. We show that the precision of the transit parameters measured using CHEOPS is comparable to that from larger space telescopes such as Spitzer Space Telescope and Kepler. We use the updated planet parameters from our analysis to derive new constraints on the internal structure of these four exoplanets.

show abstract

Section: Implementation and Dependenciesmentioning

confidence: 99%

Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) usingpycheops

Maxted¹,

Ehrenreich²,

Wilson³

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…For all fits reported in this work, we used a Bayesian method to find an estimate of the posterior probability distribution, by using an Affine Invariant Markov chain Monte Carlo (MCMC) Ensemble sampler method as implemented in the Python packages lmfit [48] and emcee [49]. This allowed us to obtain accurate estimates of the error and the maximum likelihood estimate (MLE) of the parameters.…”

Section: Discussionmentioning

confidence: 99%

Conformations and diffusion of flexibly linked colloidal chains

et al. 2021

View full text Add to dashboard Cite

For biologically relevant macromolecules such as intrinsically disordered proteins, internal degrees of freedom that allow for shape changes have a large influence on both the motion and function of the compound. A detailed understanding of the effect of flexibility is needed in order to explain their behavior. Here, we study a model system of freely-jointed chains of three to six colloidal spheres, using both simulations and experiments. We find that in spite of their short lengths, their conformational statistics are well described by two dimensional Flory theory, while their average translational and rotational diffusivity follow the Kirkwood-Riseman scaling. Their maximum flexibility does not depend on the length of the chain, but is determined by the near-wall in-plane translational diffusion coefficient of an individual sphere. Furthermore, we uncover shape-dependent effects in the short-time diffusivity of colloidal tetramer chains, as well as non-zero couplings between the different diffusive modes. Our findings may have implications for understanding both the diffusive behavior and the most likely conformations of macromolecular systems in biology and industry, such as proteins, polymers, single-stranded DNA and other chain-like molecules.

show abstract

“…Our results are summarised in Table 1 and 𝑄 𝜙 images at a surface brightness of 0.7 and 1.3 mJy arcsec −2 , respectively, and their corresponding best fitting elliptical ring model. Newville et al 2020) to explore the posterior probability distribution of each of the parameters in our model. The values and uncertainties quoted in Table 1 correspond to the median and 1𝜎 quantiles of these probability distributions.…”

Section: Inferred Disc Geometry and Potential Flaring Of The Disc Sca...mentioning

confidence: 99%

“…The minimize function of lmfit (version 1.0.1; Newville et al 2020) was used to fit our elliptical ring model to the data. Specifically, we minimised the radial distance between the cylindrical coordinates of the isophote and the elliptical ring at the same azimuthal angle.…”

Section: Inferred Disc Geometry and Potential Flaring Of The Disc Sca...mentioning

confidence: 99%

Scattering and sublimation: a multi-scale view of $μ$m-sized dust in the inclined disc of HD 145718

Davies,

Rich,

Harries

et al. 2022

Preprint

View full text Add to dashboard Cite

We present multi-instrument observations of the disc around the Herbig Ae star, HD 145718, employing geometric and Monte Carlo radiative transfer models to explore the disc orientation, the vertical and radial extent of the near infrared (NIR) scattering surface, and the properties of the dust in the disc surface and sublimation rim. The disc appears inclined at 67 − 71 • , with position angle, PA = −1.0 − 0.6 • , consistent with previous estimates. The NIR scattering surface extends out to ∼ 75 au and we infer an aspect ratio, ℎ scat (𝑟)/𝑟 ∼ 0.24 in 𝐽-band; ∼ 0.22 in 𝐻-band. Our GPI images and VLTI+CHARA NIR interferometry suggest that the disc surface layers are populated by grains 𝜆/2𝜋 in size, indicating these grains are aerodynamically supported against settling and/or the density of smaller grains is relatively low. We demonstrate that our geometric analysis provides a reasonable assessment of the height of the NIR scattering surface at the outer edge of the disc and, if the inclination can be independently constrained, has the potential to probe the flaring exponent of the scattering surface in similarly inclined (𝑖 70 • ) discs. In re-evaluating HD 145718's stellar properties, we found that the object's dimming events -previously characterised as UX Or and dipper variability -are consistent with dust occultation by grains larger, on average, than found in the ISM. This occulting dust likely originates close to the inferred dust sublimation radius at 0.17 au.

show abstract

lmfit/lmfit-py 1.0.1

Cited by 27 publications

References 0 publications

Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) usingpycheops

Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) usingpycheops

Conformations and diffusion of flexibly linked colloidal chains

Scattering and sublimation: a multi-scale view of $μ$m-sized dust in the inclined disc of HD 145718

Contact Info

Product

Resources

About