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Published September 2016 | Published + Submitted
Journal Article Open

Supplement: "Going the Distance: Mapping Host Galaxies of LIGO and Virgo Sources in Three Dimensions Using Local Cosmography and Targeted Follow-up" (2016, ApJL, 829, L15)


This is a supplement to the Letter of Singer et al., in which we demonstrated a rapid algorithm for obtaining joint 3D estimates of sky location and luminosity distance from observations of binary neutron star mergers with Advanced LIGO and Virgo. We argued that combining the reconstructed volumes with positions and redshifts of possible host galaxies can provide large-aperture but small field of view instruments with a manageable list of targets to search for optical or infrared emission. In this Supplement, we document the new HEALPix-based file format for 3D localizations of gravitational-wave transients. We include Python sample code to show the reader how to perform simple manipulations of the 3D sky maps and extract ranked lists of likely host galaxies. Finally, we include mathematical details of the rapid volume reconstruction algorithm.

Additional Information

© 2016 American Astronomical Society. Received 2016 May 13; accepted 2016 August 5; published 2016 September 21. We thank the Aspen Center for Physics and NSF grant #1066293 for hospitality during the conception, writing, and editing of this paper. We thank P Shawhan and F Tombesi for detailed feedback on the manuscript. The online data release is available at https://dcc.ligo.org/P1500071/public/html. This is LIGO document P1500071-v7. Software: Astropy (Robitaille et al. 2013), GNU Scientific Library (Galassi & Gough 2009), HEALPix (Górski et al. 2005), Matplotlib (Hunter 2007), Yt (Turk et al. 2011).

Attached Files

Submitted - 1605.04242v3.pdf

Published - apjs_226_1_10.pdf


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August 22, 2023
August 22, 2023