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Imaging and Spectral Fitting of Bright Gamma-Ray Sources with the COSI Balloon Payload

  • Authors: Jarred M. Roberts, Steven Boggs, Thomas Siegert, John A. Tomsick, Marco Ajello, Peter von Ballmoos, Jacqueline Beechert, Floriane Cangemi, Savitri Gallego, Pierre Jean, Chris Karwin, Carolyn Kierans, Hadar Lazar, Alex Lowell, Israel Martinez Castellanos, Sean Pike, Clio Sleator, Yong Sheng, Hiroki Yoneda, Andreas Zoglauer

Jarred M. Roberts et al 2025 The Astrophysical Journal 979 .

  • Provider: AAS Journals

Caption: Figure 3.

Crab, Cyg X-1, and Cen A data selections binned into 30 minutes time bins (gray). A background-fitted tracer is then applied to the data (red), and background time nodes are then applied to the data to account for the constantly changing background (vertical black dashed lines). Note that the total number of counts in each time bin results in drops when the pointing cut is applied. These then serve as natural time nodes for rescaling the background.

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