17 citations · 41 across the 19 of their papers we have counts for
21 papers
Early panchromatic spectra reveal helium in the thermonuclear supernova 2024kce
Abigail Polin, Dillon Hasenour, Sahana Kumar +26
Faint Type I supernovae blur the boundaries between spectroscopic classes, obscuring their progenitors and explosion mechanisms. One proposed origin is a double detonation, in whic…
Nebular Spectra of the Extremely Metal-Poor SN II 2023ufx Over a Year After Explosion: A Massive Progenitor and Unique Circumstellar Environment
Evan Jennerjahn, Michael A. Tucker, Christopher S. Kochanek +3
We present new observations of the metal-poor ( ) Type II supernova 2023ufx and its host galaxy. The deep nebular spectrum, obtained roughly a year after explos…
ATLAS22kjn (AT 2022fpx): A Coronal Line Emitter with an Early Light Curve Bump and Mid-Infrared Dust Echo
Athena C. Engholm, Jason T. Hinkle, Benjamin J. Shappee +14
We present an analysis of ATLAS22kjn (AT 2022fpx), whose high-ionisation coronal lines (CLs) and pre-peak light curve bump provide distinctive opportunities to investigate the phys…
AT2021yky: A Fast-Rising Optical Transient with Evolving Broad Hydrogen Emission Consistent with an Ambiguous Nuclear Transient
Paarmita Pandey, Jason T. Hinkle, Christopher Kochanek +14
Nuclear transients are powerful probes of supermassive black hole properties, offering insight into black hole mass, accretion physics, and the structure of galactic nuclei. Among…
A Natural Telescope: Discovery of the Strongly Lensed Type II SN 2025mkn at
Cameron Lemon, Ariel Goobar, Joel Johansson +90
We present the discovery of SN 2025mkn, a gravitationally lensed Type II supernova. First detected as a blue transient in ZTF, 0.83 from a elliptical gala…
SCAT Data Release 1: 1812 optical spectra of 1331 transients
Michael A. Tucker, Mark E. Huber, Benjamin J. Shappee +19
We present the first data release (DR1) of the Spectroscopic Classification of Astronomical Transients (SCAT) survey, covering the first years of observations (March 20…
ASAS-SN Rates IV: Constraints on the Kilonova Rate
Dhvanil D. Desai, Benjamin J. Shappee, Christopher S. Kochanek +10
Kilonovae (KNe) are the electromagnetic signatures of neutron star mergers and are likely the dominant site of cosmic -process nucleosynthesis. However, their intrinsic rate rem…
Contemporaneous Optical and Near-Infrared Observations of the Interstellar Comet 3I/ATLAS Pre- and Post-Perihelion
Kyle Medler, Willem B. Hoogendam, Christopher Ashall +12
Interstellar objects provide a unique view into the formation of other star systems. Here we present spectroscopic observations of the recently discovered interstellar object 3I/AT…
Multiple outflows and delayed ejections revealed by early imaging of novae
Elias Aydi, John D. Monnier, Antoine Mérand +39
Novae are thermonuclear eruptions on accreting white dwarfs in interacting binaries. Although most of the accreted envelope is expelled, the mechanism -- impulsive ejection, multip…
Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS
Darryl Z. Seligman, Marco Micheli, Davide Farnocchia +44
We report initial observations aimed at the characterization of a third interstellar object. This object, 3I/ATLAS or C/2025 N1 (ATLAS), was discovered on 2025 July 1 UT and has an…
The ASAS-SN Low Surface Brightness Survey I: Proof-of-Concept and Potential Applications
Evan Jennerjahn, Michael A. Tucker, Benjamin J. Shappee +6
The ASAS-SN Low Surface Brightness Survey utilizes the years of g-band CCD data from ASAS-SN (The All-Sky Automated Survey for Supernovae) to create stacked images of the e…
Plasma Instabilities Dominate Radioactive Transients Magnetic Fields: The self-confinement of leptons in Type Ia and Core-Collapse Supernovae, and Kilonovae
Dhvanil D. Desai, Colby C. Haggerty, Benjamin J. Shappee +8
The light curves of radioactive transients, such as supernovae and kilonovae, are powered by the decay of radioisotopes, which release high-energy leptons through and d…
Expanding the parameter space of 2002es-like type Ia supernovae: on the underluminous ASASSN-20jq / SN 2020qxp
Subhash Bose, Maximilian D. Stritzinger, Chris Ashall +23
We present optical photometric and spectroscopic observations of the peculiar Type Ia supernova ASASSN-20jq/SN 2020qxp. It is a low-luminosity object with a peak absolute magnitude…
On the Double: Two Luminous Flares from the Nearby Tidal Disruption Event ASASSN-22ci (AT2022dbl) and Connections to Repeating TDE Candidates
Jason T. Hinkle, Katie Auchettl, Willem B. Hoogendam +16
We present observations of ASASSN-22ci (AT2022dbl), a nearby tidal disruption event (TDE) discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d$_L…
Weighing The Options: The Unseen Companion in LAMOST J2354 is Likely a Massive White Dwarf
M. A. Tucker, A. J. Wheeler, D. M. Rowan +1
LAMOST J235456.73+335625 (J2354) is a binary system hosting a K dwarf and a dark companion, supposedly a neutron star, in a 0.48d orbi…
Echo Location: Distances to Galactic Supernovae From ASAS-SN Light Echoes and 3D Dust Maps
Kyle D. Neumann, Michael A. Tucker, Christopher S. Kochanek +2
Light echoes occur when light from a luminous transient is scattered by dust back into our line of sight with a time delay due to the extra propagation distance. We introduce a nov…
The Anomalous Acceleration of PSR J2043+1711: Long-Period Orbital Companion or Stellar Flyby?
Thomas Donlon, Sukanya Chakrabarti, Michael T. Lam +53
Based on the rate of change of its orbital period, PSR J2043+1711 has a substantial peculiar acceleration of 3.5 0.8 mm/s/yr, which deviates from the acceleration predicted b…
The Most Energetic Transients: Tidal Disruptions of High-Mass Stars
Jason T. Hinkle, Benjamin J. Shappee, Katie Auchettl +13
We present the class of extreme nuclear transients (ENTs), including the most energetic single transient yet discovered, Gaia18cdj. Each ENT is coincident with its host-galaxy nucl…
Hawai'i Supernova Flows: A Peculiar Velocity Survey Using Over a Thousand Supernovae in the Near-Infrared
Aaron Do, Benjamin J. Shappee, John L. Tonry +15
We introduce the Hawai'i Supernova Flows project and present summary statistics of the first 1,217 astronomical transients observed, 668 of which are spectroscopically classified T…
Stellar Flares Are Far-Ultraviolet Luminous
Vera L. Berger, Jason T. Hinkle, Michael A. Tucker +6
We identify 182 flares on 158 stars within 100 pc of the Sun in both the near-ultraviolet (NUV: 1750-2750 Å) and far-ultraviolet (FUV: 1350-1750 Å) using high-cadence light curves…
SN 2022jli: a type Ic supernova with periodic modulation of its light curve and an unusually long rise
Moore T., Smartt S. J., Nicholl M. +42
We present multi-wavelength photometry and spectroscopy of SN 2022jli, an unprecedented Type Ic supernova discovered in the galaxy NGC 157 at a distance of 23 Mpc. The mu…