ZTF alert stream
To design the broker and test the science modules while waiting for LSST data, we use the ZTF alert stream. The ZTF alert data (full, unfiltered, 5-sigma alert stream) is publicly available through their web portal, and you can find all information about ZTF alerts here.
ZTF alert data serialisation is done using Apache Avro. Typically, to design your science module you have three main observables:
- the sky location (ra, dec)
- the light-curve (up to 1 month history in g, r, i filter bands)
- 30x30 pixels cutouts (observation, template, and difference image)
Other fields are described here.