STag II: Classification of Serendipitous Supernovae Observed by Galaxy Redshift Surveys

Abstract

With the number of supernovae observed expected to drastically increase thanks to large-scale surveys like the Dark Energy Spectroscopic Instrument (DESI), it is necessary that the tools we use to classify these objects keep up with this increase. We previously created Supernova Tagging and Classification (STag) to address this problem by employing machine learning techniques alongside logistic regression in order to assign 'tags' to spectra based on spectral features. STag II is a continuation of this work, which now makes use of model supernova spectra combined with real DESI spectra in order to train STag to better deal with realistic data. We also make use of the rlap score as a trustworthiness cut, making for a more robust and accurate supernova classifier than before.

21 pages, 7 figures. The STag code is available at https://github.com/wdavison909/STag

References in corpus (15)

• Array Programming with NumPy
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• Determining the Type, Redshift, and Age of a Supernova Spectrum
• Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument
• Confined Dense Circumstellar Material Surrounding a Regular Type II Supernova: The Unique Flash-Spectroscopy Event of SN 2013fs
• The Early Data Release of the Dark Energy Spectroscopic Instrument
• The metamorphosis of Supernova SN2008D/XRF080109: a link between Supernovae and GRBs/Hypernovae
• The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument
• The Robotic Multi-Object Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI)
• The type IIb SN 2008ax: spectral and light curve evolution
• A measurement of the Hubble constant from Type II supernovae
• OzDES multi-object fibre spectroscopy for the Dark Energy Survey: Results and second data release
• The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by
• Very late-time spectroscopy of SN 2009ip: Constraints on the ongoing H$\alpha$ emission
• Searching for Supernovae in HETDEX Data Release 3

Cited by in corpus (1)

• Searching for Type Ia Supernovae in the Dark Energy Spectroscopic Instrument