538 citations · 7.2k across the 77 of their papers we have counts for
77 papers
Spectroscopy of AT 2016blu's recurring supernova impostor outbursts
Mojgan Aghakhanloo, Nathan Smith, Jennifer E. Andrews +7
We present spectra of the supernova (SN) impostor AT 2016blu spanning over a decade. This transient exhibits quasiperiodic outbursts with a 113 d period, likely triggered by…
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…
Space Telescope and Optical Reverberation Mapping Project. XII. Broad-Line Region Modeling of NGC 5548
P. R. Williams, A. Pancoast, T. Treu +155
We present geometric and dynamical modeling of the broad line region for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The dataset includes photo…
The Palomar Transient Factory Core-Collapse Supernova Host-Galaxy Sample. I. Host-Galaxy Distribution Functions and Environment-Dependence of CCSNe
Steve Schulze, Ofer Yaron, Jesper Sollerman +51
Several thousand core-collapse supernovae (CCSNe) of different flavors have been discovered so far. However, identifying their progenitors has remained an outstanding open question…
SN 2014ab: An Aspherical Type IIn Supernova with Low Polarization
Christopher Bilinski, Nathan Smith, G. Grant Williams +20
We present photometry, spectra, and spectropolarimetry of supernova (SN) 2014ab, obtained through days after peak brightness. SN 2014ab was a luminous Type IIn SN ($M_V…
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548
Keith Horne, G. De Rosa, B. M. Peterson +155
We report velocity-delay maps for prominent broad emission lines, Ly_alpha, CIV, HeII and H_beta, in the spectrum of NGC5548. The emission-line responses inhabit the interior of a…
Berkeley Supernova Ia Program: Data Release of 637 Spectra from 247 Type Ia Supernovae
Benjamin E. Stahl, WeiKang Zheng, Thomas de Jaeger +18
We present 637 low-redshift optical spectra collected by the Berkeley Supernova Ia Program (BSNIP) between 2009 and 2018, almost entirely with the Kast double spectrograph on the S…
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…
Lick Observatory Supernova Search Follow-Up Program: Photometry Data Release of 93 Type Ia Supernovae
Benjamin E. Stahl, WeiKang Zheng, Thomas de Jaeger +52
We present BVRI and unfiltered light curves of 93 Type Ia supernovae (SNe Ia) from the Lick Observatory Supernova Search (LOSS) follow-up program conducted between 2005 and 2018. O…
Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum
G. A. Kriss, G. De Rosa, J. Ely +164
We model the ultraviolet spectra of the Seyfert 1 galaxy NGC~5548 obtained with the Hubble Space Telescope during the 6-month reverberation-mapping campaign in 2014. Our model of t…
The Berkeley Sample of Stripped-Envelope Supernovae
Isaac Shivvers, Alexei V. Filippenko, Jeffrey M. Silverman +22
We present the complete sample of stripped-envelope supernova (SN) spectra observed by the Lick Observatory Supernova Search (LOSS) collaboration over the last three decades: 888 s…
The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-Line Region
Peter R. Williams, Anna Pancoast, Tommaso Treu +22
We present models of the H-emitting broad-line region (BLR) in seven Seyfert 1 galaxies from the Lick AGN (Active Galactic Nucleus) Monitoring Project 2011 sample, drawing infer…
Some Bright Stars with Smooth Continua for Calibrating the Response of High Resolution Spectrographs
Kelsey Clubb, Andrew W. Howard, Howard Isaacson +2
When characterizing a high resolution echelle spectrograph, for instance for precise Doppler work, it is useful to observe featureless sources such as quartz lamps or hot stars to…
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…
Stripped-envelope supernova SN 2004dk is now interacting with hydrogen-rich circumstellar material
Jon C. Mauerhan, Alexei V. Filippenko, Weikang Zheng +4
The dominant mechanism and time scales over which stripped-envelope supernovae (SNe) progenitor stars shed their hydrogen envelopes are uncertain. Observations of Type Ib and Ic SN…
Stability of the Broad Line Region Geometry and Dynamics in Arp 151 Over Seven Years
A. Pancoast, A. J. Barth, K. Horne +24
The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning . We present modeling of these velocity-resolved reverberation mappi…
New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
Adam G. Riess, Stefano Casertano, Wenlong Yuan +8
We present new parallax measurements of 7 long-period (> 10 days) Milky Way Cepheids (SS CMa, XY Car, VY Car, VX Per, WZ Sgr, X Pup and S Vul) using astrometry from spatial scannin…
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 Ia Supernova Distances at z > 1.5 from the Hubble Space Telescope Multi-Cycle Treasury Programs: The Early Expansion Rate
Adam G. Riess, Steven A. Rodney, Daniel M. Scolnic +31
We present an analysis of 15 Type Ia supernovae (SNe Ia) at redshift z > 1 (9 at 1.5 < z < 2.3) recently discovered in the CANDELS and CLASH Multi-Cycle Treasury programs using WFC…
Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the UV anomaly in NGC 5548 with X-Ray Spectroscopy
S. Mathur, A. Gupta, K. Page +147
During the Space Telescope and Optical Reverberation Mapping Project (STORM) observations of NGC 5548, the continuum and emission-line variability became de-correlated during the s…
Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-Line Analysis for NGC 5548
L. Pei, M. M. Fausnaugh, A. J. Barth +153
We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multi-wavelength reverberation mapping campaign. The campaign spanned s…
After the Fall: Late-Time Spectroscopy of Type IIP Supernovae
Jeffrey M. Silverman, Stephanie Pickett, J. Craig Wheeler +11
Herein we analyse late-time (post-plateau; 103 < t < 1229 d) optical spectra of low-redshift (z < 0.016), hydrogen-rich Type IIP supernovae (SNe IIP). Our newly constructed sample…
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…
Optical and ultraviolet spectroscopic analysis of SN 2011fe at late times
Brian Friesen, E. Baron, Jerod T. Parrent +16
We present optical spectra of the nearby Type Ia supernova SN 2011fe at 100, 205, 311, 349, and 578 days post-maximum light, as well as an ultraviolet spectrum obtained with Hubble…