publications | Suren Gourapura

2026

Multi-sensor fusion for fine-guidance and milliarcsecond-level attitude estimation of balloon-borne telescope

Philippe Voyer, Maya Amit, Steven J. Benton, Benjamin E. Boyd, and 43 more authors

Jul 2026

DOI
picoMUX: microcontroller based time-domain multiplexing readout for kilopixel TES arrays

Simon Tartakovsky, Alexandre E. Adler, Jason E. Austermann, Steven J. Benton, and 22 more authors

Jul 2026
Sub-Kelvin Cryogenics for a Super-Pressure Balloon-Borne CMB Polarimeter: Taurus

Jared L. May, Alexandre E. Adler, Jason E. Austermann, Steven J. Benton, and 22 more authors

Jun 2026

2025

Analysis of Polarized Dust Emission Using Data from the First Flight of SPIDER

P. A. R. Ade, M. Amiri, S. J. Benton, A. S. Bergman, and 66 more authors

The Astrophysical Journal, Jan 2025

Abs DOI

Using data from the first flight of Spider and from the Planck High Frequency Instrument, 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 domains are applied to probe their consistency and to quantify modeling errors associated with their assumptions. Analyses of diffuse Galactic dust emission spanning the full Spider region demonstrate (i) a spectral energy distribution that is broadly consistent with a modified-blackbody (MBB) model with a spectral index of β d = 1.45 ± 0.05 (1.47 ± 0.06) for E (B)-mode polarization, slightly lower than that reported by Planck for the full sky; (ii) an angular power spectrum broadly consistent with a power law; and (iii) no significant detection of line-of-sight polarization decorrelation. Tests of several modeling uncertainties find only a modest impact (∼10% in σ r ) on Spider’s sensitivity to the cosmological tensor-to-scalar ratio. The size of the Spider region further allows for a statistically meaningful analysis of the variation in foreground properties within it. Assuming a fixed dust temperature T d = 19.6 K, an analysis of two independent subregions of that field results in inferred values of β d = 1.52 ± 0.06 and β d = 1.09 ± 0.09, which are inconsistent at the 3.9σ level. Furthermore, a joint analysis of Spider and Planck 217 and 353 GHz data within one subregion is inconsistent with a simple MBB at more than 3σ, assuming a common morphology of polarized dust emission over the full range of frequencies. This evidence of variation may inform the component-separation approaches of future cosmic microwave background polarization experiments.

2024

In-flight performance of Spider’s 280-GHz receivers

Elle C. Shaw, Peter A. R. Ade, Scott Akers, Mandana Amiri, and 82 more authors

Journal of Astronomical Telescopes, Instruments, and Systems, Dec 2024

DOI
Modeling optical systematics for the Taurus CMB experiment

Alexandre E. Adler, Jason E. Austermann, Steven J. Benton, Shannon M. Duff, and 15 more authors

Journal of Cosmology and Astroparticle Physics, Sep 2024

DOI
Instrument overview of Taurus: a balloon-borne CMB and dust polarization experiment

Jared L. May, Alexandre E. Adler, Jason E. Austermann, Steven J. Benton, and 19 more authors

In Ground-based and Airborne Telescopes X, Sep 2024

DOI
Thermal architecture for a cryogenic super-pressure balloon payload: design and development of the Taurus flight cryostat

Simon Tartakovsky, Alexandre E. Adler, Jason E. Austermann, Steven J. Benton, and 19 more authors

In Ground-based and Airborne Telescopes X, Sep 2024

DOI

2021

Evolving Antennas for Ultra-High Energy Neutrino Detection

Julie Rolla, Dean Arakaki, Maximilian Clowdus, Amy Connolly, and 16 more authors

Dec 2021

2020

Evolving Antennas for Ultra-High Energy Neutrino Detection

Julie Rolla, Amy Connolly, Kai Staats, Stephanie Wissel, and 15 more authors

May 2020

2018

Surface engineered polyanhydride-based oral Salmonella subunit nanovaccine for poultry

Sankar Renu, Ashley D Markazi, Santosh Dhakal, Yashavanth S Lakshmanappa, and 6 more authors

International Journal of Nanomedicine, Nov 2018