The Baryon Mapping eXperiment: a 21cm intensity mapping pathfinder

Paul O'Connor; Anže Slosar; Maile Harris; Justine Haupt; John Kuczewski; Emily Kuhn; Laura Newburgh; Annie Polish; Benjamin Saliwanchik; Chris Sheehy; Paul Stankus; Gregory Troiani; William Tyndall

doi:10.1117/12.2576250

13 December 2020 The Baryon Mapping eXperiment: a 21cm intensity mapping pathfinder

Paul O'Connor, Anže Slosar, Maile Harris, Justine Haupt, John Kuczewski, Emily Kuhn, Laura Newburgh, Annie Polish, Benjamin Saliwanchik, Chris Sheehy, Paul Stankus, Gregory Troiani, William Tyndall

Author Affiliations +

Proceedings Volume 11445, Ground-based and Airborne Telescopes VIII; 114457C (2020) https://doi.org/10.1117/12.2576250
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Baryon Mapping eXperiment (BMX) is an interferometric array designed as a pathfinder for a future post-reionization 21 cm intensity mapping survey. It consists of four 4-meter parabolic reflectors each having offset pyramidal horn feed, quad-ridge orthomode transducer, temperature-stabilized RF amplification and filtering, and pulsed noise injection diode. An undersampling readout scheme uses 8-bit digitizers running at 1.1 Gsamples/ sec to provide access to signals from 1.1 - 1.55 GHz (third Nyquist zone), corresponding to HI emission from sources at redshift 0 < z < 0:3. An FX correlator is implemented in GPU and generates 28 GB/day of time-ordered visibility data. About 7,000 hours of data were collected from Jan. 2019 - May 2020, and we will present results on system performance including sensitivity, beam mapping studies, observations of bright celestial targets, and system electronics upgrades. BMX is a pathfinder for the proposed PUMA intensity mapping survey in the 2030s.

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Paul O'Connor, Anže Slosar, Maile Harris, Justine Haupt, John Kuczewski, Emily Kuhn, Laura Newburgh, Annie Polish, Benjamin Saliwanchik, Chris Sheehy, Paul Stankus, Gregory Troiani, and William Tyndall "The Baryon Mapping eXperiment: a 21cm intensity mapping pathfinder", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 114457C (13 December 2020); https://doi.org/10.1117/12.2576250

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