Publications (38)
Development of a Very Faint Meteor Detection System based on an EMCCD Sensor and Matched Filter Processing
P. Gural, T. Mills, M. Mazur +1
The mass ranges of meteors, imaged by electro-optical (EO) cameras and backscatter radar receivers, for the most part do not overlap. Typical EO systems detect meteoroid masses dow…
First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble Constant
E. Macaulay, R. C. Nichol, D. Bacon +106
We present an improved measurement of the Hubble constant (H_0) using the 'inverse distance ladder' method, which adds the information from 207 Type Ia supernovae (SNe Ia) from the…
Swift-UVOT detection of GRB 050318
M. Still, P. W. A. Roming, K. O. Mason +27
We present observations of GRB 050318 by the Ultra-Violet and Optical Telescope (UVOT) on-board the Swift observatory. The data are the first detections of a Gamma Ray Burst (GRB)…
SN2017jgh - A high-cadence complete shock cooling lightcurve of a SN IIb with the Kepler telescope
P. Armstrong, B. E. Tucker, A. Rest +69
SN 2017jgh is a type IIb supernova discovered by Pan-STARRS during the C16/C17 campaigns of the Kepler/K2 mission. Here we present the Kepler/K2 and ground based observations of SN…
JWST Medium-Resolution Infrared Spectroscopy of SN 2022acko: Tracing Molecule Formation in the Nebular Phase
K. Medler, T. Mera, C. Ashall +28
The Type II supernova (SN II) SN 2022acko was the first to be spectroscopically observed by the James Webb Space Telescope (). Here, we analyze SN 2022acko's second…
Numerical and Physical Challenges to Nebular Spectroscopy in Thermonuclear Supernovae
P. Hoeflich, E. Fereidouni, A. Fisher +8
Thermodynamical explosions of White Dwarfs (WD)are one of the keys to high precision cosmology. Nebular spectra, namely mid-infrared (MIR) with JWST are an effective tool to probe…
Very Early Optical Afterglows of Gamma-Ray Bursts: Evidence for Relative Paucity of Detection
P. W. A. Roming, P. Schady, D. B. Fox +38
Very early observations with the Swift satellite of gamma-ray burst (GRB) afterglows reveal that the optical component is not detected in a large number of cases. This is in contra…
An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685
P. Bluhm, E. Palle, K. Molaverdikhani +51
Dynamical histories of planetary systems, as well as atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population,…
Ultraviolet Diversity of Type Ia Supernovae
Ryan J. Foley, Yen-Chen Pan, P. Brown +9
Ultraviolet (UV) observations of Type Ia supernovae (SNe Ia) probe the outermost layers of the explosion, and UV spectra of SNe Ia are expected to be extremely sensitive to differe…
The First Data Release of CNIa0.02 -- A Complete Nearby (Redshift <0.02) Sample of Type Ia Supernova Light Curves
Ping Chen, Subo Dong, C. S. Kochanek +41
The CNIa0.02 project aims to collect a complete, nearby sample of Type Ia supernovae (SNe Ia) light curves, and the SNe are volume-limited with host-galaxy redshifts z_host < 0.02.…
Circumstellar Interaction Powers the Light Curves of Luminous Rapidly Evolving Optical Transients
C. Pellegrino, D. A. Howell, J. Vinkó +16
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 un…
First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation
D. Brout, D. Scolnic, R. Kessler +122
We present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified type Ia supernovae (SNe Ia) from the first three years of the…
AXIOM: Advanced X-ray Imaging Of the Magnetosphere
G. Branduardi-Raymont, S. F. Sembay, J. P. Eastwood +22
Planetary plasma and magnetic field environments can be studied by in situ measurements or by remote sensing. While the former provide precise information about plasma behaviour, i…
The gamma-ray burst GRB060614 requires a novel explosive process
A. Gal-Yam, D. Fox, P. Price +26
Over the past decade our physical understanding of gamma-ray bursts (GRBs) has progressed rapidly thanks to the discovery and observation of their long-lived afterglow emission. Lo…
JWST NIRSpec+MIRI Observations of the nearby Type IIP supernova 2022acko
M. Shahbandeh, C. Ashall, P. Hoeflich +65
We present JWST spectral and photometric observations of the Type IIP supernova (SN) 2022acko at ~50 days past explosion. These data are the first JWST spectral observations of a c…
Orbital and Physical Characteristics of Meter-scale Impactors from Airburst Observations
P. Brown, P. Wiegert, D. Clark +1
We have analysed the orbits and ablation characteristics in the atmosphere of 59 earth-impacting fireballs, produced by meteoroids one meter in diameter or larger, described here a…
Compact x-ray source based on burst-mode inverse Compton scattering at 100 kHz
W. S. Graves, J. Bessuille, P. Brown +13
A design for a compact x-ray light source (CXLS) with flux and brilliance orders of magnitude beyond existing laboratory scale sources is presented. The source is based on inverse…
Ultraviolet Spectroscopy of Supernovae: The First Two Years of Swift Observations
F. Bufano, S. Immler, M. Turatto +13
We present the entire sample of ultraviolet (UV) spectra of supernovae (SNe) obtained with the Ultraviolet/Optical Telescope (UVOT) on board the Swift satellite during the first 2…
Triple-frequency meteor radar full wave scattering Measurements and comparison to theory
G. Stober, P. Brown, M. Campbell-Brown +1
Context. Radar scattering from meteor trails depends on several poorly constrained quantities, such as electron line density, q, initial trail radius, r0, and ambipolar diffusion c…
First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
T. M. C. Abbott, S. Allam, P. Andersen +141
We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses…
The diversity of Type II supernova versus the similarity in their progenitors
S. Valenti, D. A. Howell, M. D. Stritzinger +19
High-quality collections of Type II supernova (SN) light curves are scarce because they evolve for hundreds of days, making follow-up observations time consuming and often extendin…
An extremely luminous X-ray outburst at the birth of a supernova
A. M. Soderberg, E. Berger, K. L. Page +40
Massive stars end their short lives in spectacular explosions, supernovae, that synthesize new elements and drive galaxy evolution. Throughout history supernovae were discovered ch…
A Two Year Survey for VLF Emission from Fireballs
C. Y. Sung, P. Brown, R. Marshall
Here we report on a two year continuous survey to examine possible VLF signals associated with meteors brighter than magnitude -5. Our survey allowed both calibrated temporal and s…
A First Transients Survey with JWST: the FLARE project
Lifan Wang, D. Baade, E. Baron +43
JWST was conceived and built to answer one of the most fundamental questions that humans can address empirically: "How did the Universe make its first stars?". Our First Lights At…
TOI-2266 b: a keystone super-Earth at the edge of the M dwarf radius valley
Hannu Parviainen, Felipe Murgas, Emma Esparza-Borges +59
We validate the Transiting Exoplanet Survey Satellite (TESS) object of interest TOI-2266.01 (TIC 348911) as a small transiting planet (most likely a super-Earth) orbiting a faint M…
The shock break-out of GRB 060218/SN 2006aj
S. Campana, V. Mangano, A. J. Blustin +36
Although the link between long Gamma Ray Bursts (GRBs) and supernovae (SNe) has been established, hitherto there have been no observations of the beginning of a supernova explosion…
A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds
J. G. Winters, R. Cloutier, A. A. Medina +79
LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 parsecs. The primary star LTT 1445A (0.257 M_Sun) is known to host the transiting planet LTT 144…
Scalar Curvature Invariants in Classical and Quantum Gravity
B. Shakerin, D. D. McNutt, B. Mattingly +8
A short review of scalar curvature invariants in gravity theories is presented. We introduce how these invariants are constructed and discuss the minimal number of invariants requi…
A Search for Hydroacoustic Signals from Bolides
P. Brown, L. McFadden, D. McCormack +2
Here we present a survey aimed at detecting hydroacoustic signals from fireballs using the six hydrophone stations operated as part of the Comprehensive Test Ban Treaty Organisatio…
Characterizing the Daytime Sextantids Meteor Shower and Unveiling the Nature of the Phaethon-Geminid Stream Complex
Y. Kipreos, Margaret Campbell-Brown, P. Brown +1
The Daytime Sextantids meteor shower, part of the Phaethon-Geminid Stream Complex (PGC), is closely related to the Geminids, currently the strongest meteor shower visible at the Ea…
Geometric surfaces: An invariant characterization of spherically symmetric black hole horizons and wormhole throats
D. D. McNutt, W. Julius, M. Gorban +3
We consider a spherically symmetric line element which admits either a black hole geometry or a wormhole geometry and show that in both cases the apparent horizon or the wormhole t…
An Optical Survey for mm-Sized Interstellar Meteoroids
R. Musci, R. J. Weryk, P. Brown +2
We report high resolution multi-station observations of meteors by the Canadian Automated Meteor Observatory (CAMO) recorded from June 2009 to August 2010. Our survey has a limitin…
Constraining the Source of the High-velocity Ejecta in Type Ia SN 2019ein
C. Pellegrino, D. A. Howell, S. K. Sarbadhicary +16
We present multiwavelength photometric and spectroscopic observations of SN 2019ein, a high-velocity Type Ia supernova (SN Ia) discovered in the nearby galaxy NGC 5353 with a two-d…
Comparative Analysis of SN 2012dn Optical Spectra: Days -14 to +114
J. T. Parrent, D. A. Howell, R. A. Fesen +19
SN 2012dn is a super-Chandrasekhar mass candidate in a purportedly normal spiral (SAcd) galaxy, and poses a challenge for theories of type Ia supernova diversity. Here we utilize t…
Pressure sensing using vertically aligned carbon nanotubes on a flexible substrate
E. L. Carter, P. Brown, R. L. Smith +1
Sensing technologies have been under research and development for their varied applications from microelectronics to space exploration. With the end of Moores law in sight, there i…
First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Photometric Pipeline and Light Curve Data Release
D. Brout, M. Sako, D. Scolnic +89
We present griz light curves of 251 Type Ia Supernovae (SNe Ia) from the first 3 years of the Dark Energy Survey Supernova Program's (DES-SN) spectroscopically classified sample. T…
DES14X3taz: A Type I Superluminous Supernova Showing a Luminous, Rapidly Cooling Initial Pre-Peak Bump
M. Smith, M. Sullivan, C. B. D'Andrea +81
We present DES14X3taz, a new hydrogen-poor super luminous supernova (SLSN-I) discovered by the Dark Energy Survey (DES) supernova program, with additional photometric data provided…
Far-Ultraviolet to Near-Infrared Spectroscopy of A Nearby Hydrogen Poor Superluminous Supernova Gaia16apd
Lin Yan, R. Quimby, A. Gal-Yam +8
We report the first maximum-light far-Ultraviolet to near-infrared spectra (1000A - 1.62um, rest) of a H-poor superluminous supernova, Gaia16apd. At z=0.1018, it is one of the clos…