Final published version
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - The Gravity Collective: A Search for the Electromagnetic Counterpart to the Neutron Star–Black Hole Merger GW190814
AU - Kilpatrick, Charles D.
AU - Coulter, David A.
AU - Arcavi, Iair
AU - Brink, Thomas G.
AU - Dimitriadis, Georgios
AU - Filippenko, Alexei V.
AU - Foley, Ryan J.
AU - Howell, D. Andrew
AU - Jones, David O.
AU - Kasen, Daniel
AU - Makler, Martin
AU - Piro, Anthony L.
AU - Rojas-Bravo, César
AU - Sand, David J.
AU - Swift, Jonathan J.
AU - Tucker, Douglas
AU - Zheng, WeiKang
AU - Allam, Sahar S.
AU - Annis, James T.
AU - Antilen, Juanita
AU - Bachmann, Tristan G.
AU - Bloom, Joshua S.
AU - Bom, Clecio R.
AU - Bostroem, K. Azalee
AU - Brout, Dillon
AU - Burke, Jamison
AU - Butler, Robert E.
AU - Butner, Melissa
AU - Campillay, Abdo
AU - Clever, Karoli E.
AU - Conselice, Christopher J.
AU - Cooke, Jeff
AU - Dage, Kristen C.
AU - de Carvalho, Reinaldo R.
AU - de Jaeger, Thomas
AU - Desai, Shantanu
AU - Garcia, Alyssa
AU - Garcia-Bellido, Juan
AU - Gill, Mandeep S. S.
AU - Girish, Nachiket
AU - Hallakoun, Na’ama
AU - Herner, Kenneth
AU - Hiramatsu, Daichi
AU - Holz, Daniel E.
AU - Huber, Grace
AU - Kawash, Adam M.
AU - McCully, Curtis
AU - Medallon, Sophia A.
AU - Metzger, Brian D.
AU - Modak, Shaunak
AU - Morgan, Robert
AU - Muñoz, Ricardo R.
AU - Muñoz-Elgueta, Nahir
AU - Murakami, Yukei S.
AU - Felipe, Olivares E.
AU - Palmese, Antonella
AU - Patra, Kishore C.
AU - Pereira, Maria E. S.
AU - Pessi, Thallis L.
AU - Pineda-Garcia, J.
AU - Quirola-Vásquez, Jonathan
AU - Ramirez-Ruiz, Enrico
AU - Rembold, Sandro Barboza
AU - Rest, Armin
AU - Rodríguez, Ósmar
AU - Santana-Silva, Luidhy
AU - Sherman, Nora F.
AU - Siebert, Matthew R.
AU - Smith, Carli
AU - Smith, J. Allyn
AU - Soares-Santos, Marcelle
AU - Stacey, Holland
AU - Stahl, Benjamin E.
AU - Strader, Jay
AU - Strasburger, Erika
AU - Sunseri, James
AU - Tinyanont, Samaporn
AU - Tucker, Brad E.
AU - Ulloa, Natalie
AU - Valenti, Stefano
AU - Vasylyev, Sergiy S.
AU - Wiesner, Matthew P.
AU - Zhang, Keto D.
PY - 2021/12/20
Y1 - 2021/12/20
N2 - We present optical follow-up imaging obtained with the Katzman Automatic Imaging Telescope, Las Cumbres Observatory Global Telescope Network, Nickel Telescope, Swope Telescope, and Thacher Telescope of the LIGO/Virgo gravitational wave (GW) signal from the neutron star-black hole (NSBH) merger GW190814. We searched the GW190814 localization region (19 deg2 for the 90th percentile best localization), covering a total of 51 deg2 and 94.6% of the two-dimensional localization region. Analyzing the properties of 189 transients that we consider as candidate counterparts to the NSBH merger, including their localizations, discovery times from merger, optical spectra, likely host galaxy redshifts, and photometric evolution, we conclude that none of these objects are likely to be associated with GW190814. Based on this finding, we consider the likely optical properties of an electromagnetic counterpart to GW190814, including possible kilonovae and short gamma-ray burst afterglows. Using the joint limits from our follow-up imaging, we conclude that a counterpart with an r-band decline rate of 0.68 mag day-1, similar to the kilonova AT 2017gfo, could peak at an absolute magnitude of at most -17.8 mag (50% confidence). Our data are not constraining for "red"kilonovae and rule out "blue"kilonovae with M > 0.5 M o˙ (30% confidence). We strongly rule out all known types of short gamma-ray burst afterglows with viewing angles <17° assuming an initial jet opening angle of ∼5.°2 and explosion energies and circumburst densities similar to afterglows explored in the literature. Finally, we explore the possibility that GW190814 merged in the disk of an active galactic nucleus, of which we find four in the localization region, but we do not find any candidate counterparts among these sources.
AB - We present optical follow-up imaging obtained with the Katzman Automatic Imaging Telescope, Las Cumbres Observatory Global Telescope Network, Nickel Telescope, Swope Telescope, and Thacher Telescope of the LIGO/Virgo gravitational wave (GW) signal from the neutron star-black hole (NSBH) merger GW190814. We searched the GW190814 localization region (19 deg2 for the 90th percentile best localization), covering a total of 51 deg2 and 94.6% of the two-dimensional localization region. Analyzing the properties of 189 transients that we consider as candidate counterparts to the NSBH merger, including their localizations, discovery times from merger, optical spectra, likely host galaxy redshifts, and photometric evolution, we conclude that none of these objects are likely to be associated with GW190814. Based on this finding, we consider the likely optical properties of an electromagnetic counterpart to GW190814, including possible kilonovae and short gamma-ray burst afterglows. Using the joint limits from our follow-up imaging, we conclude that a counterpart with an r-band decline rate of 0.68 mag day-1, similar to the kilonova AT 2017gfo, could peak at an absolute magnitude of at most -17.8 mag (50% confidence). Our data are not constraining for "red"kilonovae and rule out "blue"kilonovae with M > 0.5 M o˙ (30% confidence). We strongly rule out all known types of short gamma-ray burst afterglows with viewing angles <17° assuming an initial jet opening angle of ∼5.°2 and explosion energies and circumburst densities similar to afterglows explored in the literature. Finally, we explore the possibility that GW190814 merged in the disk of an active galactic nucleus, of which we find four in the localization region, but we do not find any candidate counterparts among these sources.
U2 - 10.3847/1538-4357/ac23c6
DO - 10.3847/1538-4357/ac23c6
M3 - Journal article
VL - 923
JO - The Astrophysical Journal
JF - The Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 258
ER -