The Astrophysical Journal (Jan 2024)

Expected Gamma-Ray Burst Detection Rates and Redshift Distributions for the BlackCAT CubeSat Mission

  • Joseph M. Colosimo,
  • Derek B. Fox,
  • Abraham D. Falcone,
  • David M. Palmer,
  • Frederic Hancock,
  • Michael Betts,
  • William A. Bevidas Jr.,
  • Jacob C. Buffington,
  • David N. Burrows,
  • Zachary Catlin,
  • Timothy Emeigh,
  • Thomas Forstmeier,
  • Kadri M. Nizam,
  • Collin Reichard,
  • Ana C. Scigliani,
  • Lukas R. Stone,
  • Ian Thornton,
  • Mitchell Wages,
  • Daniel Washington,
  • Michael E. Zugger

DOI
https://doi.org/10.3847/1538-4357/ad4f8b
Journal volume & issue
Vol. 969, no. 2
p. 138

Abstract

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We report the results of an extensive set of simulations exploring the sensitivity of the BlackCAT CubeSat to long-duration gamma-ray bursts (GRBs). BlackCAT is a NASA APRA-funded CubeSat mission for the detection and real-time subarcminute localization of high-redshift ( z ≳ 3.5) GRBs. Thanks to their luminous and long-lived afterglow emissions, GRBs are uniquely valuable probes of high-redshift star-forming galaxies and the intergalactic medium. In addition, each detected GRB with a known redshift serves to localize a region of high-redshift star formation in three dimensions, enabling deep follow-on searches for host galaxies and associated local and large-scale structures. We explore two distinct models for the GRB redshift distribution and luminosity function, both consistent with Swift observations. We find that, for either model, BlackCAT is expected to detect a mean of 42 bursts per year on orbit, with 6.7% to 10% of these at z > 3.5. BlackCAT bursts will be localized to an r _90 ≲ 55″ precision and reported to the community within seconds. Due to the mission orbit and pointing scheme, bursts will be located in the night sky and well placed for deep multiwavelength follow-up observations. BlackCAT is on schedule to achieve launch readiness in 2025.

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