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A DESGW search for the electromagnetic counterpart to the LIGO/Virgo gravitational-wave binary neutron star merger candidate S190510g

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A DESGW search for the electromagnetic counterpart to the LIGO/Virgo gravitational-wave binary neutron star merger candidate S190510g. / DES Collaboration; Avila, S.; Thomas, D.

In: Astrophysical Journal, Vol. 903, No. 1, 75, 01.11.2020.

Research output: Contribution to journalArticlepeer-review

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DES Collaboration ; Avila, S. ; Thomas, D. / A DESGW search for the electromagnetic counterpart to the LIGO/Virgo gravitational-wave binary neutron star merger candidate S190510g. In: Astrophysical Journal. 2020 ; Vol. 903, No. 1.

Bibtex

@article{7fd607097f0347d19bbf34be2a706aa8,
title = "A DESGW search for the electromagnetic counterpart to the LIGO/Virgo gravitational-wave binary neutron star merger candidate S190510g",
abstract = "We present the results from a search for the electromagnetic counterpart of the LIGO/Virgo event S190510g using the Dark Energy Camera (DECam). S190510g is a binary neutron star (BNS) merger candidate of moderate significance detected at a distance of 227 ± 92 Mpc and localized within an area of 31 (1166) square degrees at 50% (90%) confidence. While this event was later classified as likely nonastrophysical in nature within 30 hours of the event, our short latency search and discovery pipeline identified 11 counterpart candidates, all of which appear consistent with supernovae following offline analysis and spectroscopy by other instruments. Later reprocessing of the images enabled the recovery of six more candidates. Additionally, we implement our candidate selection procedure on simulated kilonovae and supernovae under DECam observing conditions (e.g., seeing and exposure time) with the intent of quantifying our search efficiency and making informed decisions on observing strategy for future similar events. This is the first BNS counterpart search to employ a comprehensive simulation-based efficiency study. We find that using the current follow-up strategy, there would need to be 19 events similar to S190510g for us to have a 99% chance of detecting an optical counterpart, assuming a GW170817-like kilonova. We further conclude that optimization of observing plans, which should include preference for deeper images over multiple color information, could result in up to a factor of 1.5 reduction in the total number of follow-ups needed for discovery.",
keywords = "gravitational wave astronomy",
author = "{DES Collaboration} and A. Garcia and R. Morgan and K. Herner and A. Palmese and M. Soares-Santos and J. Annis and D. Brout and Vivas, {A. K.} and A. Drlica-Wagner and L. Santana-Silva and Tucker, {D. L.} and S. Allam and M. Wiesner and J. Garc{\'i}a-Bellido and Gill, {M. S.S.} and M. Sako and R. Kessler and Davis, {T. M.} and D. Scolnic and J. Casares and H. Chen and C. Conselice and J. Cooke and Z. Doctor and Foley, {R. J.} and J. Horvath and Howell, {D. A.} and Kilpatrick, {C. D.} and C. Lidman and Olivares, {F. E.} and F. Paz-Chinch{\'o}n and Pineda, {J. G.} and J. Quirola-V{\'a}squez and A. Rest and N. Sherman and Abbott, {T. M.C.} and M. Aguena and S. Avila and E. Bertin and S. Bhargava and D. Brooks and Burke, {D. L.} and {Carnero Rosell}, A. and J. Carretero and M. Costanzi and Marshall, {J. L.} and M. Smith and D. Thomas and Walker, {A. R.} and J. Weller",
year = "2020",
month = nov,
day = "1",
doi = "10.3847/1538-4357/abb823",
language = "English",
volume = "903",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - A DESGW search for the electromagnetic counterpart to the LIGO/Virgo gravitational-wave binary neutron star merger candidate S190510g

AU - DES Collaboration

AU - Garcia, A.

AU - Morgan, R.

AU - Herner, K.

AU - Palmese, A.

AU - Soares-Santos, M.

AU - Annis, J.

AU - Brout, D.

AU - Vivas, A. K.

AU - Drlica-Wagner, A.

AU - Santana-Silva, L.

AU - Tucker, D. L.

AU - Allam, S.

AU - Wiesner, M.

AU - García-Bellido, J.

AU - Gill, M. S.S.

AU - Sako, M.

AU - Kessler, R.

AU - Davis, T. M.

AU - Scolnic, D.

AU - Casares, J.

AU - Chen, H.

AU - Conselice, C.

AU - Cooke, J.

AU - Doctor, Z.

AU - Foley, R. J.

AU - Horvath, J.

AU - Howell, D. A.

AU - Kilpatrick, C. D.

AU - Lidman, C.

AU - Olivares, F. E.

AU - Paz-Chinchón, F.

AU - Pineda, J. G.

AU - Quirola-Vásquez, J.

AU - Rest, A.

AU - Sherman, N.

AU - Abbott, T. M.C.

AU - Aguena, M.

AU - Avila, S.

AU - Bertin, E.

AU - Bhargava, S.

AU - Brooks, D.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carretero, J.

AU - Costanzi, M.

AU - Marshall, J. L.

AU - Smith, M.

AU - Thomas, D.

AU - Walker, A. R.

AU - Weller, J.

PY - 2020/11/1

Y1 - 2020/11/1

N2 - We present the results from a search for the electromagnetic counterpart of the LIGO/Virgo event S190510g using the Dark Energy Camera (DECam). S190510g is a binary neutron star (BNS) merger candidate of moderate significance detected at a distance of 227 ± 92 Mpc and localized within an area of 31 (1166) square degrees at 50% (90%) confidence. While this event was later classified as likely nonastrophysical in nature within 30 hours of the event, our short latency search and discovery pipeline identified 11 counterpart candidates, all of which appear consistent with supernovae following offline analysis and spectroscopy by other instruments. Later reprocessing of the images enabled the recovery of six more candidates. Additionally, we implement our candidate selection procedure on simulated kilonovae and supernovae under DECam observing conditions (e.g., seeing and exposure time) with the intent of quantifying our search efficiency and making informed decisions on observing strategy for future similar events. This is the first BNS counterpart search to employ a comprehensive simulation-based efficiency study. We find that using the current follow-up strategy, there would need to be 19 events similar to S190510g for us to have a 99% chance of detecting an optical counterpart, assuming a GW170817-like kilonova. We further conclude that optimization of observing plans, which should include preference for deeper images over multiple color information, could result in up to a factor of 1.5 reduction in the total number of follow-ups needed for discovery.

AB - We present the results from a search for the electromagnetic counterpart of the LIGO/Virgo event S190510g using the Dark Energy Camera (DECam). S190510g is a binary neutron star (BNS) merger candidate of moderate significance detected at a distance of 227 ± 92 Mpc and localized within an area of 31 (1166) square degrees at 50% (90%) confidence. While this event was later classified as likely nonastrophysical in nature within 30 hours of the event, our short latency search and discovery pipeline identified 11 counterpart candidates, all of which appear consistent with supernovae following offline analysis and spectroscopy by other instruments. Later reprocessing of the images enabled the recovery of six more candidates. Additionally, we implement our candidate selection procedure on simulated kilonovae and supernovae under DECam observing conditions (e.g., seeing and exposure time) with the intent of quantifying our search efficiency and making informed decisions on observing strategy for future similar events. This is the first BNS counterpart search to employ a comprehensive simulation-based efficiency study. We find that using the current follow-up strategy, there would need to be 19 events similar to S190510g for us to have a 99% chance of detecting an optical counterpart, assuming a GW170817-like kilonova. We further conclude that optimization of observing plans, which should include preference for deeper images over multiple color information, could result in up to a factor of 1.5 reduction in the total number of follow-ups needed for discovery.

KW - gravitational wave astronomy

UR - http://www.scopus.com/inward/record.url?scp=85095821130&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/abb823

DO - 10.3847/1538-4357/abb823

M3 - Article

AN - SCOPUS:85095821130

VL - 903

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 75

ER -

ID: 25687569