80 citations · 144 across the 10 of their papers we have counts for
11 papers
StarDICE III: Characterization of the photometric instrument with a Collimated Beam Projector
Thierry Souverin, Jérémy Neveu, Marc Betoule +18
The measurement of type Ia supernovae magnitudes provides cosmological distances, which can be used to constrain dark energy parameters. Large photometric surveys require a substan…
COOL-LAMPS VI: Lens model and New Constraints on the Properties of COOL J1241+2219, a Bright z = 5 Lyman Break Galaxy and its z = 1 Cluster Lens
Maxwell Klein, Keren Sharon, Kate Napier +20
We present a strong lensing analysis of COOL J1241+2219, the brightest known gravitationally lensed galaxy at , based on new multi-band Hubble Space Telescope (HST) imagi…
The Pantheon+ Analysis: Dependence of Cosmological Constraints on Photometric-Zeropoint Uncertainties of Supernova Surveys
Sasha Brownsberger, Dillon Brout, Daniel Scolnic +2
Type Ia supernovae (SNe Ia) measurements of the Hubble constant, H, the cosmological mass density, , and the dark energy equation-of-state parameter, , rely on numerous…
Characterization and Quantum Efficiency Determination of Monocrystalline Silicon Solar Cells as Sensors for Precise Flux Calibration
Sasha Brownsberger, Lige Zhang, David Andrade +1
As the precision frontier of astrophysics advances towards the one millimagnitude level, flux calibration of photometric instrumentation remains an ongoing challenge. We present th…
COOL-LAMPS I. An Extraordinarily Bright Lensed Galaxy at Redshift 5.04
Gourav Khullar, Katya Gozman, Jason J. Lin +19
We report the discovery of COOL J1241+2219, a strongly-lensed galaxy at redshift =5.0430.002 with observed magnitude , lensed by a moderate-mass galaxy cluste…
Windowing Artifacts Likely Account for Recent Claimed Detection of Oscillating Cosmic Scale Factor
Sasha Brownsberger, Christopher Stubbs, Daniel Scolnic
Using the Pantheon data set of Type Ia supernovae, a recent publication (R20 in this work) reports a detection of oscillations in the expansion history of the universe. Apply…
Stellar Profile Independent Determination of the Dark Matter Distribution of the Fornax Local Group Dwarf Spheroidal Galaxy
Sasha Brownsberger, Lisa Randall
The local group dwarf spheroidal galaxies (LG dSphs) are among the most promising astrophysical targets for probing the small scale structure of dark matter (DM) subhalos. We descr…
Initial Assessment of Monocrystalline Silicon Solar Cells as Large-Area Sensors for Precise Flux Calibration
Sasha Brownsberger, Nicholas Mondrik, Christopher W. Stubbs
As the precision frontier of large-area survey astrophysics advances towards the one millimagnitude level, flux calibration of astronomical instrumentation remains an ongoing chall…
The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
Ping Chen, Subo Dong, M. D. Stritzinger +21
We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- and r-band decline between peak and 10 days post peak of Delta m_10(B)=5.24+/-0.07 mag a…
Constraining Temporal Oscillations of Cosmological Parameters Using Type Ia Supernovae
Sasha R. Brownsberger, Christopher W. Stubbs, Daniel M. Scolnic
The existing set of type Ia supernovae (SNe Ia) is now sufficient to detect oscillatory deviations from the canonical CDM cosmology. We determine that the Fourier spectrum of th…
A Survey for H Pulsar Bow Shocks
Sasha Brownsberger, Roger W. Romani
We report on a survey for H bow shock emission around nearby -detected energetic pulsars. This survey adds three Balmer-dominated neutron star bow shocks to the six previousl…