-
UV and optical spectra of type IIP SN2021yja
We present three epochs of early-time ultraviolet (UV) and optical HST/STIS spectroscopy of the young, nearby Type IIP supernova (SN) 2021yja. We complement the HST data with... -
Follow-up LCO photometry & spectra of SN 2016dsg
A thermonuclear explosion triggered by a He-shell detonation on a carbon-oxygen white-dwarf core has been predicted to have strong UV line blanketing at early times due to the... -
LC analysis of type I superluminous SNe
Recent work has revealed that the light curves of hydrogen-poor (TypeI) superluminous supernovae (SLSNe), thought to be powered by magnetar central engines, do not always follow... -
The GALEX-PTF experiment. II. Core-collapse SNe
The radius and surface composition of an exploding massive star, as well as the explosion energy per unit mass, can be measured using early ultraviolet (UV) observations of... -
Optical light curves of the superluminous SN2018lfe
We present optical imaging and spectroscopy of SN 2018lfe, which we classify as a Type I superluminous supernova (SLSN-I) at a redshift of z=0.3501+/-0.0004 with a peak absolute... -
A compilation of optical spectra from 361 SNe Ia
We present a data-driven method based on long short-term memory (LSTM) neural networks to analyze spectral time series of Type Ia supernovae (SNeIa). The data set includes 3091... -
Multiwavelength monitoring of the type Ib SN 2014C
SN 2014C was originally classified as a Type Ib supernova, but at phase {phi}=127d, post-explosion strong H{alpha} emission was observed. SN 2014C has since been observed in... -
HCT spectroscopic obs. of the type IIP SN 2020jfo
We present spectroscopic and photometric observations of the Type IIP supernova, SN2020jfo, in ultraviolet and optical wavelengths. SN2020jfo occurred in the spiral galaxy M61... -
Spectra of the type Ibn SN 2019wep
We present a high-cadence short term photometric and spectroscopic monitoring campaign of a type Ibn SN 2019wep, which is one of the rare SN Ibn after SNe 2010al and 2019uo to... -
Phot. and sp. obs. of type Ia SN 2015bo
We present optical and near-infrared photometric and spectroscopic observations of the fast-declining Type Ia supernova (SN) 2015bo. SN2015bo is underluminous... -
Phot. & sp. follow-up of type Ia SN2020esm
Seeing pristine material from the donor star in a type Ia supernova (SN Ia) explosion can reveal the nature of the binary system. In this paper, we present photometric and... -
30yrs of spectroscopic measurements of VMP DLAs
We place empirical constraints on the yields from zero- and low-metallicity core-collapse supernovae (CCSNe) using abundances measured in very metal-poor (VMP; [Fe/H]<=-2)... -
Spectroscopic follow-up of Type Ib SN 2017iro
We report results of optical imaging and low-resolution spectroscopic monitoring of supernova (SN) 2017iro that occurred in the nearby (~31Mpc) galaxy NGC 5480. The... -
Type Icn SN2021csp photometry & spectra
We present observations of SN 2021csp, the second example of a newly identified type of supernova (SN) hallmarked by strong, narrow, P Cygni carbon features at early times (Type... -
Photometry follow-up of 3 core-collapse SNe
We present observations of three core-collapse supernovae (CCSNe) in elliptical hosts, detected by the Zwicky Transient Facility Bright Transient Survey (BTS). SN 2019ape is a... -
New LBT/MODS spectra of type Ia SN 2011fe
We present three new spectra of the nearby Type Ia supernova (SNIa) 2011fe covering ~480-850days after maximum light and show that the ejecta undergoes a rapid ionization shift... -
Type Ia supernovae with GALEX observations
Using ultraviolet (UV) light curves, we constrain the circumstellar environments of 1080 Type Ia supernovae (SNe Ia) within z<0.5 from archival Galaxy Evolution Explorer... -
Fast-evolving SNIbn with LCO LCs & FLOYDS sp.
Rapidly evolving transients, or objects that rise and fade in brightness on timescales two to three times shorter than those of typical Type Ia or Type II supernovae (SNe), have... -
Optical phot. and sp. monitoring of SN 2020sck
We present optical UBVRI photometry and low-to-medium resolution spectroscopic observations of type Iax supernova SN 2020sck spanning -5.5 days to +67 days from maximum light in... -
Type Ia SNe with galaxy host properties
More luminous Type Ia supernovae prefer less massive hosts and regions of higher star formation. This correlation is inverted during width-color-luminosity light-curve...
