A DESGW Search for the Electromagnetic Counterpart to the LIGO/Virgo Gravitational-wave Binary Neutron Star Merger Candidate S190510g

Garcia, A.; Morgan, R.; Herner, K.; Palmese, A.; Soares-Santos, M.; Annis, J.; Brout, D.; Vivas, A. K.; Drlica-Wagner, A.; Santana-Silva, L.; Tucker, D. L.; Allam, S.; Wiesner, M.; García-Bellido, J.; Gill, M. S.; Sako, M.; Kessler, R.; Davis, T. M.; Scolnic, D.; Casares, J.; Chen, H.; Conselice, C.; Cooke, J.; Doctor, Z.; Foley, R. J.; Horvath, J.; Howell, D. A.; Kilpatrick, C. D.; Lidman, C.; E., F. Olivares; Paz-Chinchón, F.; Pineda-G., J.; Quirola-Vásquez, J.; Rest, A.; Sherman, N.; Abbott, T. C.; Aguena, M.; Avila, S.; Bertin, E.; Bhargava, S.; Brooks, D.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Carretero, J.; Costanzi, M.; da Costa, L. N.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Everett, S.; Flaugher, B.; Fosalba, P.; Friedel, D.; Frieman, J.; Gaztanaga, E.; Gerdes, D. W.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Lima, M.; Maia, M. G.; March, M.; Marshall, J. L.; Menanteau, F.; Miquel, R.; Ogando, R. C.; Plazas, A. A.; Romer, A. K.; Roodman, A.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Swanson, M. C.; Tarle, G.; Thomas, D.; Varga, T. N.; Walker, A. R.; Weller, J.

doi:10.3847/1538-4357/abb823

Title: A DESGW Search for the Electromagnetic Counterpart to the LIGO/Virgo Gravitational-wave Binary Neutron Star Merger Candidate S190510g

Journal Article · Tue Nov 03 00:00:00 EST 2020 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/1538-4357/abb823· OSTI ID:1638656

;

; Sako, M.;

;

; Scolnic, D.;

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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Spanish Ministry of Science and Innovation (MICINN); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Contributing Organization:: DES Collaboration

Grant/Contract Number:: AC02-07CH11359; AC02-76SF00515; AC02- 07CH11359; AST-1138766; AST-1536171; 240672; 291329; 306478; 1829740; 1744555; ESP2017-89838; PGC2018-094773; PGC2018-102021; SEV-2016-0588; SEV-2016-0597; MDM-2015-0509; SC0019193; AC05-00OR22725

OSTI ID:: 1638656

Alternate ID(s):: OSTI ID: 1768041; OSTI ID: 1783259; OSTI ID: 1809946

Report Number(s):: FERMILAB-PUB-20-255-AE; arXiv:2007.00050; oai:inspirehep.net:1804591

Journal Information:: The Astrophysical Journal (Online), Vol. 903, Issue 1; ISSN 1538-4357

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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