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View article: The SPHEREx Satellite Mission
The SPHEREx Satellite Mission Open
SPHEREx, a NASA explorer satellite launched on 11 March 2025, is carrying out the first all-sky near-infrared spectral survey. The satellite observes in 102 spectral bands from 0.75 to 5.0 um with a resolving power ranging from 35 to 130 i…
View article: Optimized Observation Sequencing in Low-Earth Orbit with the SPHEREx Survey Planning Software
Optimized Observation Sequencing in Low-Earth Orbit with the SPHEREx Survey Planning Software Open
SPHEREx is a NASA infrared astronomy mission that launched on March 12th, 2025 and is operating successfully in low-Earth orbit (LEO). The mission is currently observing the entire sky in 102 spectral channels in four independent all-sky s…
View article: In-flight performance of SPIDER's 280 GHz receivers
In-flight performance of SPIDER's 280 GHz receivers Open
SPIDER is a balloon-borne instrument designed to map the cosmic microwave background at degree-angular scales in the presence of Galactic foregrounds. Spider has mapped a large sky area in the Southern Hemisphere using more than 2000 trans…
View article: Analysis of Polarized Dust Emission Using Data from the First Flight of SPIDER
Analysis of Polarized Dust Emission Using Data from the First Flight of SPIDER Open
Using data from the first flight of SPIDER and from Planck HFI, we probe the properties of polarized emission from interstellar dust in the SPIDER observing region. Component separation algorithms operating in both the spatial and harmonic…
View article: In-Flight Gain Monitoring of SPIDER’s Transition-Edge Sensor Arrays
In-Flight Gain Monitoring of SPIDER’s Transition-Edge Sensor Arrays Open
View article: A Simulation-based Method for Correcting Mode Coupling in CMB Angular Power Spectra
A Simulation-based Method for Correcting Mode Coupling in CMB Angular Power Spectra Open
Modern cosmic microwave background (CMB) analysis pipelines regularly employ complex time-domain filters, beam models, masking, and other techniques during the production of sky maps and their corresponding angular power spectra. However, …
View article: A Constraint on Primordial B-modes from the First Flight of the Spider Balloon-borne Telescope
A Constraint on Primordial B-modes from the First Flight of the Spider Balloon-borne Telescope Open
We present the first linear polarization measurements from the 2015 long-duration balloon flight of Spider , which is an experiment that is designed to map the polarization of the cosmic microwave background (CMB) on degree angular scales.…
View article: The XFaster Power Spectrum and Likelihood Estimator for the Analysis of Cosmic Microwave Background Maps
The XFaster Power Spectrum and Likelihood Estimator for the Analysis of Cosmic Microwave Background Maps Open
We present the XFaster analysis package, a fast, iterative angular power spectrum estimator based on a diagonal approximation to the quadratic Fisher matrix estimator. It uses Monte Carlo simulations to compute noise biases and filter tran…
View article: Design and pre-flight performance of SPIDER 280 GHz receivers
Design and pre-flight performance of SPIDER 280 GHz receivers Open
In this work we describe upgrades to the Spider balloon-borne telescope in preparation for its second flight, currently planned for December 2021. The Spider instrument is optimized to search for a primordial B-mode polarization signature …
View article: PICO: Probe of Inflation and Cosmic Origins
PICO: Probe of Inflation and Cosmic Origins Open
The Probe of Inflation and Cosmic Origins (PICO) is a proposed probe-scale space mission consisting of an imaging polarimeter operating in frequency bands between 20 and 800 GHz. We describe the science achievable by PICO, which has sensit…
View article: PICO: Probe of Inflation and Cosmic Origins
PICO: Probe of Inflation and Cosmic Origins Open
The Probe of Inflation and Cosmic Origins (PICO) is an imaging polarimeter\nthat will scan the sky for 5 years in 21 frequency bands spread between 21 and\n799 GHz. It will produce full-sky surveys of intensity and polarization with a\nfin…
View article: PICO: Probe of Inflation and Cosmic Origins
PICO: Probe of Inflation and Cosmic Origins Open
The Probe of Inflation and Cosmic Origins (PICO) is an imaging polarimeter that will scan the sky for 5 years in 21 frequency bands spread between 21 and 799 GHz. It will produce full-sky surveys of intensity and polarization with a final …
View article: SPIDER: CMB Polarimetry from the Edge of Space
SPIDER: CMB Polarimetry from the Edge of Space Open
View article: PICO - the probe of inflation and cosmic origins
PICO - the probe of inflation and cosmic origins Open
The Probe of Inflation and Cosmic Origins (PICO) is a NASA-funded study of a Probe-class mission concept. The top-level science objectives are to probe the physics of the Big Bang by measuring or constraining the energy scale of inflation,…
View article: Optical design of PICO: a concept for a space mission to probe inflation and cosmic origins
Optical design of PICO: a concept for a space mission to probe inflation and cosmic origins Open
The Probe of Inflation and Cosmic Origins (PICO) is a probe-class mission concept currently under study by NASA. PICO will probe the physics of the Big Bang and the energy scale of inflation, constrain the sum of neutrino masses, measure t…
View article: PICO - the probe of inflation and cosmic origins
PICO - the probe of inflation and cosmic origins Open
The Probe of Inflation and Cosmic Origins (PICO) is a NASA-funded study of a\nProbe-class mission concept. The top-level science objectives are to probe the\nphysics of the Big Bang by measuring or constraining the energy scale of\ninflati…
View article: A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument
A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument Open
We describe the cryogenic half-wave plate rotation mechanisms built for and used in Spider, a polarization-sensitive balloon-borne telescope array that observed the cosmic microwave background at 95 GHz and 150 GHz during a stratospheric b…
View article: A cryogenic rotation stage with a large clear aperture for a half-wave plate
A cryogenic rotation stage with a large clear aperture for a half-wave plate Open
We describe the cryogenic half-wave plate rotation mechanisms built for and used in Spider, a polarization-sensitive balloon-borne telescope array that observed the Cosmic Microwave Background at 95 GHz and 150 GHz during a stratospheric b…
View article: The thermal design, characterization, and performance of the S pider long-duration balloon cryostat
The thermal design, characterization, and performance of the S pider long-duration balloon cryostat Open