Berkeley supernova Ia program: data release of 637 spectra from 247 Type Ia supernovae

• DOI: 10.1093/mnras/staa102
• Publication Date: 2020-01-13T20:12:06Z
• Authors: Benjamin E Stahl; WeiKang Zheng; Thomas de Jaeger; Thomas G Brink; Alexei V Filippenko; Jeffrey M Silverman; S Bradley Cenko; Kelsey I Clubb; Melissa L Graham; Goni Halevi; Patrick L Kelly; Io Kleiser; Isaac Shivvers; Heechan Yuk; Bethany E Cobb; Ori D Fox; Michael T Kandras...; Jason J Kong; Jon C Mauerhan; Xianggao Wang; Xiaofeng Wang
• Keywords: High Energy Astrophysical Phenomena (astro-ph.HE); Astrophysics - Solar and Stellar Astrophysics; 13. Climate action; 0103 physical sciences; FOS: Physical sciences; Astrophysics - High Energy Astrophysical Phenomena; 01 natural sciences; Solar and Stellar Astrophysics (astro-ph.SR)

We present 637 low-redshift optical spectra collected by the Berkeley Supernova Ia Program (BSNIP) between 2009 and 2018, almost entirely with Kast double spectrograph on Shane 3~m telescope at Lick Observatory. describe our automated spectral classification scheme arrive a final set of 626 (of 242 objects) that are unambiguously classified as belonging to Type supernovae (SNe~Ia). Of these, 70 30 objects spectroscopically peculiar (i.e., not matching signatures "normal" SNe~Ia) 79 SNe~Ia (covered 328 spectra) have complementary photometric coverage. The median SN in has one epoch spectroscopy, redshift 0.0208 (with low 0.0007 high 0.1921), is first observed 1.1 days after maximum light. constituent quality, signal-to-noise ratio 31.8 pixel$^{-1}$, broad wavelength coverage, $\sim 95\%$ covering least 3700--9800~Å. analyze dataset, focusing quantitative measurements (e.g., velocities, pseudo-equivalent widths) evolution prominent features available early-time late-time spectra. data community, we encourage future studies incorporate their analyses.