Paper includes supernova classified using the ALPY200

Paper includes supernova classified using the ALPY200

Postby Robin Leadbeater » Wed Aug 26, 2020 12:34 pm

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
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: Paper includes supernova classified using the ALPY200

Postby Ken Harrison » Wed Aug 26, 2020 11:22 pm

Robin,
Well done!
Congratulations.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
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Re: Paper includes supernova classified using the ALPY200

Postby jack martin » Thu Aug 27, 2020 9:36 am

Robin,

Good work, congratulations.

Jack

Essex UK
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