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SNIa observed in H-band combined with UV-opt. LCs
We analyze 143 Type Ia supernovae (SNe Ia) observed in H band (1.6-1.8{mu}m) and find that SNe Ia are intrinsically brighter in H band with increasing host galaxy stellar mass.... -
SN 2018agk spectra and NIR-UV light curves
We present the 30 minutes cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase, and... -
Type Ia SN 2020nlb opt. photometry & spectra
We present deep Chandra X-ray observations of two nearby Type Ia supernovae, SN 2017cbv and SN 2020nlb, which reveal no X-ray emission down to a luminosity L_X_<~5.3x10^37^... -
Keck/NIRES spectrum of type Ia SN 2020qxp
We present and analyze a near-infrared (NIR) spectrum of the underluminous Type Ia supernova SN 2020qxp/ASASSN-20jq obtained with NIRES at the Keck Observatory, 191 days after... -
Opt. phot. & sp. for the type Iax SN 2021fcg
We present the discovery of ZTF 21aaoryiz/SN 2021fcg-an extremely low luminosity Type Iax supernova. SN 2021fcg was discovered by the Zwicky Transient Facility in the... -
SNIa SN2017fgc follow-up phot. & spectra
We present extensive optical photometric and spectroscopic observations of the high-velocity (HV) Type Ia supernova (SN Ia) 2017fgc, covering the phase from ~12 days before to... -
Spectroscopic obs. of type Ibn ASASSN-14ms
ASASSN-14ms may represent the most luminous Type Ibn supernova (SNIbn) ever detected, with an absolute U-band magnitude brighter than -22.0mag and a total bolometric luminosity... -
HST obs. of supernova remnants in NGC6946
We constrained the progenitor masses for 169 supernova remnants (SNRs), eight historically observed supernovae (SNe), and the black hole formation candidate in NGC 6946, finding... -
Type Ic SN2018gep phot. & sp. follow-up
In the last decade a number of rapidly evolving transients have been discovered that are not easily explained by traditional supernova models. We present optical and UV data on... -
Follow-up Opt. and NIR obs. of the SNIa SN2015bp
Unburned carbon is potentially a powerful probe of Type Ia supernova (SN) explosion mechanisms. We present comprehensive optical and near-infrared (NIR) data on the... -
Opt. phot. and GMOS & NIRES spectra of SN2019yvq
We present new photometric and spectroscopic observations of SN2019yvq, a Type Ia supernova (SN Ia) exhibiting several peculiar properties including an excess of UV/optical flux... -
Optical light curves of the type Ic SN 2019stc
We present optical photometry and spectroscopy of SN 2019stc (=ZTF19acbonaa), an unusual Type Ic supernova (SN Ic) at a redshift of z=0.117. SN 2019stc exhibits a broad... -
ZTF Type II supernovae with follow-up obs.
Spectroscopic detection of narrow emission lines traces the presence of circumstellar mass distributions around massive stars exploding as core-collapse supernovae. Transient... -
UV-NIR LCs of the energetic H-stripped SN2016coi
We present comprehensive observations and analysis of the energetic H-stripped SN 2016coi (a.k.a. ASASSN-16fp), spanning the {gamma}-ray through optical and radio wavelengths,... -
SN 2018hna photometry & spectroscopy obs.
High-cadence ultraviolet, optical, and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The... -
Optical photometry of type Ia SN 2014J
We present extensive ground-based and Hubble Space Telescope (HST) photometry of the highly reddened, very nearby SN Ia 2014J in M82, covering the phases from 9 days before to... -
CfA, CSP, BSP and LOSS spec. & phot. of SNe Ia
SNe Ia play key roles in revealing the accelerating expansion of the universe, but our knowledge of their progenitors is still very limited. Here we report the discovery of a... -
9 epochs spectroscopy of type I supernova SN 201iet
We present optical photometry and spectroscopy of SN2016iet (=Gaia16bvd=PS17brq), an unprecedented Type I supernova (SNI) at z=0.0676 with no obvious analog in the existing... -
BVI photometry of the TypeII SN KSP-SN-2016kf
We present the discovery and the photometric and spectroscopic study of H-rich Type II supernova (SN) KSP-SN-2016kf (SN2017it) observed in the KMTNet Supernova Program in the... -
Revised redshifts of the Pantheon supernovae Ia
Redshifts used in current cosmological supernova samples are measured using two primary techniques, one based on well-measured host galaxy spectral lines and the other based on...
