Paper includes supernova classified using the ALPY200

[Robin Leadbeater]

The paper "The Zwicky Transient Facility Census of the Local Universe I: Systematic search for Calcium rich gap
transients reveal three related spectroscopic sub-classes
Kishalay De et al"

https://arxiv.org/abs/2004.09029

has been accepted for publication. It includes a spectrum of SN 2018gwo taken with the ALPY200. It was discovered by amateur Patrick Wiggins and I initially classified it as a type 1c supernova. It turned out to be a rather rare Calcium rich gap transient supernova, based on a spectrum taken in the nebula phase 5 months later using the Keck 1 telescope. (One of only 8 out of 754 supernovae found during the survey period) so I am included as a co-author. ZTF use a spectrograph with a similar low resolution to the ALPY 200 (R~150) to classify transients they find but the system was down for maintenance at the time. But for the amateur discovery and initial classification of SN 2018gwo, it might have been missed.

Cheers
Robin

[Ken Harrison]

Robin,
Well done!
Congratulations.

[Jack Martin]

Robin,

Good work, congratulations.

Jack

Essex UK