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The Lick Observatory Supernova Search follow-up program: photometry data release of 70 stripped-envelope supernovae
WeiKang Zheng, Benjamin E. Stahl, Thomas de Jaeger +85
We present BVRI and unfiltered Clear light curves of 70 stripped-envelope supernovae (SESNe), observed between 2003 and 2020, from the Lick Observatory Supernova Search (LOSS) foll…
The Berkeley sample of Type II supernovae: BVRI light curves and spectroscopy of 55 SNe II
T. de Jaeger, W. Zheng, B. E. Stahl +58
In this work, BV RI light curves of 55 Type II supernovae (SNe II) from the Lick Observatory Supernova Search program obtained with the Katzman Automatic Imaging Telescope and the…
Oxygen and helium in stripped-envelope supernovae
C. Fremling, J. Sollerman, M. M. Kasliwal +23
We present an analysis of 507 spectra of 173 stripped-envelope (SE) supernovae (SNe) discovered by the untargeted Palomar Transient Factory (PTF) and intermediate PTF (iPTF) survey…
SN2013fs and SN2013fr: Exploring the circumstellar-material diversity in Type II supernovae
Christopher Bullivant, Nathan Smith, G. Grant Williams +12
We present photometry and spectroscopy of SN2013fs and SN2013fr in the first 100 days post-explosion. Both objects showed transient, relatively narrow H emission lines character…
Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light
Griffin Hosseinzadeh, Iair Arcavi, Stefano Valenti +34
Type Ibn supernovae (SNe) are a small yet intriguing class of explosions whose spectra are characterized by low-velocity helium emission lines with little to no evidence for hydrog…
Type II supernova energetics and comparison of light curves to shock-cooling models
Adam Rubin, Avishay Gal-Yam, Annalisa De Cia +37
During the first few days after explosion, Type II supernovae (SNe) are dominated by relatively simple physics. Theoretical predictions regarding early-time SN light curves in the…
Optical and near-infrared observations of SN 2013dx associated with GRB 130702A
V. L. Toy, S. B. Cenko, J. M. Silverman +33
We present optical and near-infrared light curves and optical spectra of SN 2013dx, associated with the nearby (redshift 0.145) gamma-ray burst GRB 130702A. The prompt isotropic ga…
Nebular spectra and abundance tomography of the type Ia supernova SN 2011fe: a normal SN Ia with a stable Fe core
P. A. Mazzali, M. Sullivan, A. V. Filippenko +10
A series of optical and one near-infrared nebular spectra covering the first year of the Type Ia supernova SN 2011fe are presented and modelled. The density profile that proved bes…
500 Days of SN 2013dy: spectra and photometry from the ultraviolet to the infrared
Y. -C. Pan, R. J. Foley, M. Kromer +23
SN 2013dy is a Type Ia supernova for which we have compiled an extraordinary dataset spanning from 0.1 to ~ 500 days after explosion. We present 10 epochs of ultraviolet (UV) throu…
PTF11iqb: Cool supergiant mass loss that bridges the gap between Type IIn and normal supernovae
Nathan Smith, Jon C. Mauerhan, S. Bradley Cenko +16
PTF11iqb was initially classified as a TypeIIn event caught very early after explosion. It showed narrow Wolf-Rayet (WR) spectral features on day 2, but the narrow emission weakene…
On the Progenitor System of the Type Iax Supernova 2014dt in M61
Ryan J. Foley, Schuyler D. Van Dyk, Saurabh W. Jha +5
We present pre-explosion and post-explosion Hubble Space Telescope images of the Type Iax supernova (SN Iax) 2014dt in M61. After astrometrically aligning these images, we do not d…
The hydrogen-poor superluminous supernova iPTF13ajg and its host galaxy in absorption and emission
Paul M. Vreeswijk, Sandra Savaglio, Avishay Gal-Yam +24
We present imaging and spectroscopy of a hydrogen-poor superluminous supernova (SLSN) discovered by the intermediate Palomar Transient Factory: iPTF13ajg. At a redshift of z=0.7403…
Twins for life? A comparative analysis of the Type Ia supernovae 2011fe and 2011by
Melissa L. Graham, Ryan J. Foley, Weikang Zheng +6
The nearby Type Ia supernovae (SNe Ia) 2011fe and 2011by had nearly identical photospheric phase optical spectra, light-curve widths, and photometric colours, but at peak brightnes…
Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory
Kate Maguire, Mark Sullivan, Yen-Chen Pan +15
We present an investigation of the optical spectra of 264 low-redshift (z < 0.2) Type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory, an untargeted transient su…
Estimating the First-Light Time of the Type Ia Supernova 2014J in M82
WeiKang Zheng, Isaac Shivvers, Alexei V. Filippenko +6
The Type Ia supernova (SN Ia) 2014J in M82 (d~3.5 Mpc) was serendipitously discovered by S. Fossey's group on 2014 Jan. 21 UT and has been confirmed to be the nearest known SN Ia s…
Two active states of the narrow-line gamma-ray-loud AGN GB 1310+487
K. V. Sokolovsky, F. K. Schinzel, Y. T. Tanaka +49
Previously unremarkable, the extragalactic radio source GB 1310+487 showed a gamma-ray flare on 2009 November 18, reaching a daily flux of ~10^-6 photons/cm^2/s at energies E>100 M…
The Afterglow of GRB 130427A from 1 to 10^16 GHz
D. A. Perley, S. B. Cenko, A. Corsi +31
We present multiwavelength observations of the afterglow of GRB 130427A, the brightest (in total fluence) gamma-ray burst of the past 29 years. Optical spectroscopy from Gemini-Nor…
Nebular spectroscopy of the nearby type IIb supernova 2011dh
Isaac Shivvers, Paolo Mazzali, Jeffrey M. Silverman +6
We present nebular spectra of the nearby Type IIb supernova (SN) 2011dh taken between 201 and 678 days after core collapse. At these late times, SN 2011dh exhibits strong emission…