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README.md

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 This repository was created as part of a project at the 2024 LSST Solar System Science Collaboration Readiness Sprint.
 
 ## Contributors
-- Mike Kelley
 - Fraser Gillan
+- Carrie Holt
+- Mike Kelley
 
 
 ## References

data/README.md

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+# Photometric Data for Cometary Lightcurves
+
+This repository contains `.csv` files with photometric data for selected cases of interest. The filenames follow the format: `<objname>_<surveyname>.csv`
+
+## Column Headers
+
+Each `.csv` file includes the following columns:
+
+- **mjd**: Observation time in Modified Julian Date
+- **rh**: Heliocentric distance of the target (AU)
+- **delta**: Geocentric distance (AU)
+- **alpha**: Phase angle (degrees)
+- **aper_arcsec**: Aperture size (arcseconds)
+- **mag**: Observed magnitude
+- **mag_err**: Magnitude uncertainty
+- **filter**: Telescope filter used
+
+## Example Lightcurves
+
+### Synthetic Data
+*To be determined (TBD).*
+
+### Real Data Lightcurves
+
+- **Typical Jupiter-Family Comet (JFC)**: [`19P_ATLAS.csv`](./19P_ATLAS.csv)
+- **Outburst Events**: [`46P_ZTF.csv`](./46P_ZTF.csv)
+- **Seasonal Effects**: [`67P_ATLAS.csv`](./67P_ATLAS.csv)
+- **High Signal-to-Noise Ratio (SNR)**: [`104P_ATLAS.csv`](./104P_ATLAS.csv)
+- **Solar Conjunction and Multiple Apparitions**: [`117P_ATLAS.csv`](./117P_ATLAS.csv)
+- **Low SNR**: [`179P_ATLAS.csv`](./179P_ATLAS.csv)
+- **Nucleus Detection**: [`459P_ATLAS.csv`](./459P_ATLAS.csv)
+- **Typical Long-Period Comet (LPC)**: [`C2021S3_LOOK.csv`](./C2021S3_LOOK.csv)
+- **Fading Event**: [`C2021Y1_LOOK.csv`](./C2021Y1_LOOK.csv)
+- **Unique Case (Gault)**: [`Gault_ZTF.csv`](./Gault_ZTF.csv)
+
+## Data Sources
+
+The data presented in this repository comes from the following publications:
+
+- Holt et al., 2024 (LOOK)
+- Kelley et al., 2021 (ZTF - 46P)
+- Gillan et al., *in prep* (ATLAS)
+