Astronomical Catalogs for Locating Gravitational-wave Events
Kunyang Li, Roy Williams

TL;DR
This paper develops methods to estimate stellar masses and metallicities of galaxies in catalogs to improve localization of gravitational-wave events, aiding electromagnetic follow-up observations in multi-messenger astronomy.
Contribution
It introduces new techniques for estimating galaxy properties in catalogs and validates their accuracy, enhancing strategies for GW event localization.
Findings
Estimated stellar masses closely match those in S82-MGC.
Provided relations for stellar mass estimation across multiple catalogs.
Developed an interactive tool for prioritizing follow-up observations.
Abstract
Gravitational wave transients are caused by some of the most energetic events in the Universe, and a precise location would allow deep examination of the counterpart by electromagnetic waves (telescopes collecting light), the combination of GW and EM resulting in very much improved science return (multi-messenger Astronomy). Since the GW detectors do not provide good localization on the sky, the faint counterpart will be very difficult to find. One strategy to help the search is to look first where mass is concentrated and thus the prior probability of GW events is highest. In the first part of this paper, we present methods used to estimate stellar masses and metallicities of galaxies and galaxy clusters in different catalogs. In the second part of the paper, we test our estimation accuracy by comparing our results with stellar masses given in Stripe 82 Massive Galaxy Catalogue…
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Taxonomy
TopicsAstronomical Observations and Instrumentation · Pulsars and Gravitational Waves Research · Gamma-ray bursts and supernovae
