DETECTING BINARY NEUTRON STARS WITH LIGO GERGELY D LYA ELTE Dept. - - PowerPoint PPT Presentation

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detecting binary neutron stars with ligo
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DETECTING BINARY NEUTRON STARS WITH LIGO GERGELY D LYA ELTE Dept. - - PowerPoint PPT Presentation

Feb 19, 2023 191 likes •395 views

DETECTING BINARY NEUTRON STARS WITH LIGO GERGELY D LYA ELTE Dept. of Atomic Physics ELFT Astroparticle Summer School 09/05/2018 FURTHER DETECTORS SOURCE LOCALIZATION 2 aLIGO: ~100 sqdeg, aLIGO + AdV: ~10 sqdeg SOURCE LOCALIZATION ~200

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DETECTING BINARY NEUTRON STARS WITH LIGO

GERGELY DÁLYA ELTE Dept. of Atomic Physics

ELFT Astroparticle Summer School 09/05/2018

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FURTHER DETECTORS

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SOURCE LOCALIZATION

2 aLIGO: ~100 sqdeg, aLIGO + AdV: ~10 sqdeg

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SOURCE LOCALIZATION

~200 galaxies; with distance information: 15 within 1 sigma

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GLADE CATALOG - MOTIVATION

  • No. of galaxies

50 000 3 000 000 Complete to 30 Mpc 37 Mpc Cutoff @ 100 Mpc

GWGC GLADE

no cutoff

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GLADE CATALOG - COMPILATION

2MASS XSC 2MPZ HyperLEDA SDSS-DR12Q ~1.6 million gx, no distance or B magnitude ~900 000 galaxies, photo-z and B mag ~2.6 million galaxies, spectro-z ~300 000 quasars, spectro-z or photo-z

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GLADE CATALOG - COMPILATION

CROSS-MATCHING PECULIAR VELOCITY CORRECTION Chi-squared probe with 4 parameters (RA, dec, z, B) For cosmological applications

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GLADE CATALOG - STATISTICS

3 million galaxies, 300 000 quasars, 150 globular clusters

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GLADE CATALOG - COMPLETENESS I.

Comparing the total B luminosity of GLADE galaxies to the expected

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GLADE CATALOG - COMPLETENESS II.

Dividing the galaxies into 12 distance shells and comparing their integrated luminosity to that of the Schechter function

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GLADE CATALOG - COMPLETENESS II.

Dividing the galaxies into 12 distance shells and comparing their integrated luminosity to that of the Schechter function

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HOW DOES A DETECTION LOOK LIKE?

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CHIRPS ON THE SPECTROGRAM

Online & offline analyses

Matched filtering Burst searches

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GLITCH IN LIVINGSTON

Once in every hour, well-modeled

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GW170817

~40 Mpc distance: the closest one! 1.6 and 1.1 solar masses SNR=32, 100 s length Fermi & INTEGRAL: GRB EM counterparts? Alerting partner observatories

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GW170817 - LOCALIZATION

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GW170817

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GW170817

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GW170817