.. _survey ztf:

Zwicky Transient Facility (ZTF)
===============================

ZTF is a wide-field, optical survey imaging in three bands: r, g, and i.
It produces an alert stream of astronomical transients detected by difference imaging at a rate of 10^5 - 10^6 alerts per night.
It scans the entire Northern sky every two days.

Mission resources:

- `ZTF Homepage <https://www.ztf.caltech.edu/>`__
- `ZTF Science Data System Explanatory Supplement <https://irsa.ipac.caltech.edu/data/ZTF/docs/ztf_explanatory_supplement.pdf>`__

Data products:

- Alert Stream. The schema can be viewed at `<https://zwickytransientfacility.github.io/ztf-avro-alert/schema.html>`__.
  Complete documentation can be found at the mission resources above.