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Bright Type IIP Supernovae in Low-Metallicity Galaxies
Spencer Scott, Matt Nicholl, Peter Blanchard +2
We present measurements of the pseudo-equivalent width of the Fe II,5018 absorption feature in the spectra of 12 Type IIP supernovae (SNe II) in low luminosity () dwarf h…
Target of Opportunity Observations of Gravitational Wave Events with LSST
R. Margutti, P. Cowperthwaite, Z. Doctor +79
The discovery of the electromagnetic counterparts to the binary neutron star merger GW170817 has opened the era of GW+EM multi-messenger astronomy. Exploiting this breakthrough req…
A Hydrogen-Poor Superluminous Supernova with Enhanced Iron-Group Absorption: A New Link Between SLSNe and Broad-Lined Type Ic SNe
P. K. Blanchard, M. Nicholl, E. Berger +4
We present optical observations of the Type I superluminous supernova (SLSN-I) SN2017dwh at , which reached mag at peak. Spectra taken a few…
An embedded X-ray source shines through the aspherical AT2018cow: revealing the inner workings of the most luminous fast-evolving optical transients
Raffaella Margutti, B. D. Metzger, R. Chornock +41
We present the first extensive radio to gamma-ray observations of a fast-rising blue optical transient (FBOT), AT2018cow, over its first ~100 days. AT2018cow rose over a few days t…
One thousand days of SN 2015bn: HST imaging shows a light curve flattening consistent with magnetar predictions
Matt Nicholl, Peter K. Blanchard, Edo Berger +9
We present the first observations of a Type I superluminous supernova (SLSN) at days after maximum light. We observed SN 2015bn using the Hubble Space Telescope Adva…
Nebular-phase spectra of superluminous supernovae: physical insights from observational and statistical properties
Matt Nicholl, Edo Berger, Peter K Blanchard +2
We study the spectroscopic evolution of superluminous supernovae (SLSNe) later than 100 days after maximum light. We present new data for Gaia16apd and SN2017egm, and analyse these…