The Microlenser's Guide to the Galaxy

Hoist your towel and hitch a ride—this guide is the friendly stowaway you want on every microlensing voyage. Inside you will find choose-your-own-adventure notebooks, practical utilities, and the hard-won wisdom of the Roman microlensing community, all seasoned with the proper amount of pan-galactic sparkle.

Whether you are untangling your very first Paczyński curve or wrestling a binary source into submission, these resources are here to light the path, keep the jokes coming, and remind you that science is best done with curiosity in one hand and a mug of something comforting in the other.

Notebook Expeditions

Pick a notebook, click the rocket, and let Binder spin up a live JupyterLab with the learner exercise already open. Prefer an offline jaunt? Visit the unsolved page to scout the terrain—or hop straight to the solved rendition when you crave a canonical answer key.

Introduction		Unsolved	Solved	Orientation, Einstein radii, and a guided tour of microlensing essentials.
Single Lens		Unsolved	Solved	Build and fit the classic 1L1S model, one glorious Paczyński bump at a time.
Binary Source		Unsolved	Solved	Explore the choreography of dual sources and nail down blended fluxes.
Planets & Brown Dwarfs		Unsolved	Solved	Hunt for planetary companions and elusive brown dwarfs in the wings of microlensing events.
Remnants & Dark Matter		Unsolved	Solved	Trace the signatures of remnants and dark denizens
Eras		Unsolved	Solved	Time-travel through the observational eras that shaped microlensing lore.
Modelling		Unsolved	Solved	Dive deep into modelling strategies, optimisation tricks, and goodness-of-fit diagnostics.

Unsolved Notebooks

For those eager to tackle the challenges head-on, the unsolved notebooks present a series of exercises

Notebook Library

• Introduction
• Exoplanets and brown dwarfs
• Stellar remnants and dark matter
• Microlensing eras
• The single lens model
• The binary source model
• Modelling (in development)
• In case you get an error with MulensModel and FSPL

Solved Notebooks

For those who prefer a guided experience, the solved notebooks offer comprehensive solutions to the exercises presented in the unsolved versions. Each solved notebook is meticulously crafted to provide clear explanations, step-by-step calculations, and insightful commentary to enhance your understanding of microlensing concepts.

Solved Notebook Library

• Introduction
• Exoplanets and brown dwarfs
• Stellar remnants and dark matter
• Microlensing eras
• The single lens model
• The binary source model
• Modelling (in development)