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During the hands-on session, we will show how to identify and model microlensing planets in WFIRST-like data. First, we will identify planetary signals in both previously published microlensing events and simulated WFIRST light curves. Then, we will estimate the parameters of those planets using analytic methods. Finally, we will perform full numerical fits to the simulated WFIRST data to study the kinds of planets that WFIRST will find through microlensing.
In this group activity, students learn to identify and analyzed planetary anomalies in microlensing light curves. It is designed for 8 groups of 4-10 people each, a minimum of 4 people per group is recommended (reduce the total number of groups if necessary).
Each group gets a packet of light curves for which they will identify and characterize the planets. There are 8 packets (numbered 0 -- 7) in addition to the training sets. Each packet will contain a specific type of planet (i.e. a specific range of s and q). The goal is that each group will gain familiarity with planetary perturbations arising from a particular type of planet. Then, through the presentations, they can get a sense of how planet perturbations change with the planet parameters.
The specific activities are to:
As a wrap-up, show the distribution of planets given to each group on the same plot.
All files listed under "Training Set from the Literature" and "Simulated WFIRST Microlensing Data" can be downloaded individually below, or all together in this TAR file.
For each group (0-7), there is a packet of simulated, WFIRST-like data. In the following list, [X] may be replaced by a number from [0, 7].
Plots of 25 light curves showing both the full light curve (covering 3 WFIRST seasons), and just the season with the peak of the light curve (which includes any perturbations). These light curves consist of 10 point lenses, 10 planets, and 5 binary (star) lenses.
all_events_0.pdf | all_events_1.pdf | all_events_2.pdf | all_events_3.pdf | all_events_4.pdf | all_events_5.pdf | all_events_6.pdf | all_events_7.pdf
Plots zoomed in on the planetary perturbations from all_events_[X].pdf
planets_0.pdf | planets_1.pdf | planets_2.pdf | planets_3.pdf | planets_4.pdf | planets_5.pdf | planets_6.pdf | planets_7.pdf
A list of the planets in all_events_[X].txt including the mapping between their event designations and the data file names.
gl_planets_0.txt | gl_planets_1.txt | gl_planets_2.txt | gl_planets_3.txt | gl_planets_4.txt | gl_planets_5.txt | gl_planets_6.txt | gl_planets_7.txt
Answer key for all light curves in all_events_[X].pdf. Includes the full, true set of microlensing parameters used to generate the light curve as well as the mapping between the event designation and the data file names.
master_0.txt | master_1.txt | master_2.txt | master_3.txt | master_4.txt | master_5.txt | master_6.txt | master_7.txt
Zip files containing the data files (date, mag, err) for the light curves shown in all_events_[X].pdf. Also includes data files for other types of simulated events, e.g. additional binaries, high-magnification planets (HMPlanet), and planets without caustic crossings (NCPlanet).
These files contain:
WFIRST_SAGAN_0.zip | WFIRST_SAGAN_1.zip | WFIRST_SAGAN_2.zip | WFIRST_SAGAN_3.zip | WFIRST_SAGAN_4.zip | WFIRST_SAGAN_5.zip | WFIRST_SAGAN_6.zip | WFIRST_SAGAN_7.zip
Conceptual Themes for the 2017 Sagan Summer Workshop
Microlensing Source is a resource center for all aspects of gravitational microlensing. It aims to make microlensing more accessible for anyone with an interest in the subject, including students considering a career in the field, citizen scientists and those looking for a ready reference.
An introduction to microlensing tutorial was held at Caltech prior to the 21st International Microlensing Conference in February 2017. The tutorial included the following presentations:
The following references provide some background information for the hands-on sessions:
If you are participating in the hands-on sessions, please follow these Instructions for Installing VNC, before Wednesday, Aug. 9.
Remember to bring the power source for your computer. Also, if you will be using a MacBook Air or tablet for the hands-on sessions, remember to bring an ethernet adaptor.
Click here for information and presentations from previous summer workshops.
(last updated September 8th, 2017 12:26:58)