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HEALPix Alchemy: Fast All-Sky Geometry and Image Arithmetic in a Relational Database for Multimessenger Astronomy Brokers

  • Authors: Leo P. Singer, B. Parazin, Michael W. Coughlin, Joshua S. Bloom, Arien Crellin-Quick, Daniel A. Goldstein, Stéfan van der Walt

Leo P. Singer et al 2022 The Astronomical Journal 163 .

  • Provider: AAS Journals

Caption: Figure 1.

An example of the multi-resolution HEALPix sampling scheme that is used in GW localizations. The top panel shows the localization of LIGO/Virgo event GW200115_042309 (Abbott et al. 2021; GraceDB ID S200115j) as a heat map image; darker, deeper colors represent higher probability density. The bottom panel shows the boundaries of the multi-resolution HEALPix tiles on which the sky map was sampled.

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