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Smartt, Heidi A.; Romero, Juan A.; Custer, Joyce O.; W, Hymel, Ross; Dan, Krementz,; Gobin, Derek; Harpring, L. J.; Martínez-Rodríguez, Michael J.; Varble, Don; DiMaio, Jeff; Hudson, Stephen

doi:10.2172/1333272

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“…The discovery of gravitational waves from binary-black-hole mergers highlights the need for rapid three-dimensional localisation of gravitational-wave events to understand the astrophysical nature of these sources (Nissanke et al 2013;Singer et al 2016a,b) Although the Fermi GBM did see hints of gamma rays coincident with the gravitational wave event in time (Connaughton et al 2016), other efforts at finding an electromagnetic counterpart only provided upper limits (e.g Abbott et al 2016b;Soares-Santos et al 2016;Smartt et al 2016;Fermi-LAT collaboration 2016), possibly due to the rapid decay of the electromagnetic radiation from the binary black-hole merger. Only the GBM experiment though had observations coincident in time with the event.…”

Section: Discussionmentioning

confidence: 99%

Using the 2-MASS photometric redshift survey to optimize LIGO follow-up observations

Antolini¹

2016

Mon. Not. R. Astron. Soc.

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The initial discovery of LIGO on 14 September 2015 was the inspiral merger and ringdown of the black hole binary at a distance of about 500 Mpc or a redshift of about 0.1. The search for electromagnetic counterparts for the inspiral of binary black holes is impeded by coarse initial source localisations and a lack of a compelling model for the counterpart; therefore, rapid electromagnetic follow-up is required to understand the astrophysical context of these sources. Because astrophysical sources of gravitational radiation are likely to reside in galaxies, it would make sense to search first in regions where the LIGO-Virgo probability is large and where the density of galaxies is large as well. Under the assumption that the probability of a gravitational-wave event from a given region of space is proportional to the density of galaxies within the probed volume, one can calculate an improved localisation of the position of the source simply by multiplying the LIGO-Virgo skymap by the density of galaxies in the range of redshifts. We propose using the 2-MASS Photometric Redshift Galaxy Catalogue for this purpose and demonstrate that using it can dramatically reduce the search region for electromagnetic counterparts.

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Section: Discussionmentioning

confidence: 99%

Using the 2-MASS photometric redshift survey to optimize LIGO follow-up observations

Antolini¹

2016

Mon. Not. R. Astron. Soc.

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Using the 2-MASS photometric redshift survey to optimize LIGO follow-up observations

Using the 2-MASS photometric redshift survey to optimize LIGO follow-up observations

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