Event-Parameters.md

+# Prototype event list
+
+https://gamma-astro-data-formats.readthedocs.io/en/v0.2/events/events.html
+
+## By-event parameters
+
+### Mandatory
+
+#### EVENT_ID type: int64
+Event identification number at the DL3 level. See notes on [EVENT_ID](https://gamma-astro-data-formats.readthedocs.io/en/v0.2/events/events.html#iact-events-event-id)
+* As only a int64 is possible and event identification in KM3NeT contains various subparts, a conversion function between the identifiers and our internal identification is necessary.
+* Identifier parts (19 digits available): 
+    * instrument (1 digit): i - 1 km3net, 2 antares
+    * detector_id (3 digits): ddd
+    * run_id (6 digits): rrrrrr
+    * frame_index (6 digits): ffffff
+    * trigger_counter (3 digits): ttt
+  encoded id: idddrrrrrrffffffttt
+
+#### TIME type: float64, unit: s
+Event time (see Time: https://gamma-astro-data-formats.readthedocs.io/en/v0.2/general/time.html#time)
+* KM3NeT: unix time from event time + track time
+
+#### RA type: float, unit: deg
+Reconstructed event Right Ascension (see RA / DEC: https://gamma-astro-data-formats.readthedocs.io/en/v0.2/general/coordinates.html#coords-radec ).
+
+#### DEC type: float, unit: deg
+Reconstructed event Declination (see RA / DEC: [[https://gamma-astro-data-formats.readthedocs.io/en/v0.2/general/coordinates.html#coords-radec]] ).
+
+#### ENERGY type: float, unit: TeV
+Reconstructed event energy
+* In KM3NeT: given in GeV
+
+### Optional
+https://gamma-astro-data-formats.readthedocs.io/en/v0.2/events/events.html#optional-columns
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