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GROWTH on S190425z: Searching Thousands of Square Degrees to Identify an Optical or Infrared Counterpart to a Binary Neutron Star Merger with the Zwicky Transient Facility and Palomar Gattini-IR

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dc.contributor.author Coughlin, Michael W
dc.contributor.author Tomás Ahumada
dc.contributor.author Shreya Anand
dc.contributor.author Kishalay De
dc.contributor.author Hankins, Matthew J
dc.contributor.author Kasliwa, Mansi M.
dc.contributor.author Singer, Leo P.
dc.contributor.author Eric C. Bellm
dc.contributor.author Igor Andreoni
dc.contributor.author Bradley Cenko, S.
dc.contributor.author Jeff Cooke
dc.contributor.author Copperwheat, Christopher M.
dc.contributor.author Dugas, Alison M.
dc.contributor.author Jencson, Jacob E.
dc.contributor.author Perley, Daniel A.
dc.contributor.author Po-Chieh Yu
dc.contributor.author Varun Bhalerao
dc.contributor.author Harsh Kumar
dc.contributor.author Bloom, Joshua S.
dc.contributor.author Anupama, G. C.
dc.contributor.author Ashley, Michael C. B.
dc.contributor.author Ashot Bagdasaryan
dc.contributor.author Rahul Biswas
dc.contributor.author Buckley, David A. H.
dc.contributor.author Burdge, Kevin B.
dc.contributor.author Cook, David O.
dc.contributor.author John Cromer
dc.contributor.author Virginia Cunningham
dc.contributor.author Antonino D ’ Aì
dc.contributor.author Dekany, Richard G.
dc.contributor.author Alexandre Delacroix
dc.contributor.author Simone Dichiara
dc.contributor.author Duev, Dmitry A
dc.contributor.author Anirban Dutta
dc.contributor.author Michael Feeney
dc.contributor.author Sara Frederick
dc.contributor.author Pradip Gatkine
dc.contributor.author Shaon Ghosh
dc.contributor.author Goldstein, Daniel A.
dc.contributor.author Zach Golkhou, V.
dc.contributor.author Ariel Goobar
dc.contributor.author Graham, Matthew J.
dc.contributor.author Hidekazu Hanayama
dc.contributor.author Takashi Horiuchi
dc.contributor.author Tiara Hung
dc.contributor.author Jha, Saurabh W.
dc.contributor.author Kulkarni, Shrinivas R.
dc.contributor.author Thomas Kupfer
dc.contributor.author Masci, Frank J.
dc.contributor.author Paolo Mazzali
dc.contributor.author Moore, Anna M.
dc.contributor.author Moses Mogotsi
dc.contributor.author Neill, James D.
dc.contributor.author Chow-Choong Ngeow
dc.contributor.author Jorge Martínez-Palomera
dc.contributor.author Valentina La Parola
dc.contributor.author Pavana, M.
dc.contributor.author Ofek, Eran O.
dc.contributor.author Atharva Sunil Patil
dc.contributor.author Reed Riddle
dc.contributor.author Mickael Rigault
dc.contributor.author Ben Rusholme
dc.contributor.author Eugene Serabyn
dc.contributor.author Shupe, David L.
dc.contributor.author Yashvi Sharma
dc.contributor.author Avinash Singh
dc.contributor.author Jesper Sollerman
dc.contributor.author Jamie Soon
dc.contributor.author Kai Staats
dc.contributor.author Kirsty Taggart
dc.contributor.author Hanjie Tan
dc.contributor.author Tony Travouillon
dc.contributor.author Eleonora Troja
dc.contributor.author Gaurav Waratkar
dc.contributor.author Yoichi Yatsu
dc.date.accessioned 2020-11-26T15:47:24Z
dc.date.available 2020-11-26T15:47:24Z
dc.date.issued 2019-11
dc.identifier.citation The Astrophysical Journal Letters, Vol. 885, No. 1 L19 en_US
dc.identifier.issn 2041-8205
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7431
dc.description Restricted Access © The American Astronomical Society https://iopscience.iop.org/article/10.3847/2041-8213/ab4ad8/pdf en_US
dc.description.abstract The third observing run by LVC has brought the discovery of many compact binary coalescences. Following the detection of the fi rst binary neutron star merger in this run ( LIGO / Virgo S190425z ) , we performed a dedicated follow-up campaign with the Zwicky Transient Facility ( ZTF ) and Palomar Gattini-IR telescopes. The initial skymap of this single-detector gravitational wave ( GW ) trigger spanned most of the sky observable from Palomar Observatory. Covering 8000 deg 2 of the initial skymap over the next two nights, corresponding to 46% integrated probability, ZTF system achieved a depth of ≈ 21 m AB in g - and r -bands. Palomar Gattini-IR covered 2200 square degrees in J -band to a depth of 15.5 mag, including 32% integrated probability based on the initial skymap. The revised skymap issued the following day reduced these numbers to 21% for the ZTF and 19% for Palomar Gattini- IR. We narrowed 338,646 ZTF transient “ alerts ” over the fi rst two nights of observations to 15 candidate counterparts. Two candidates, ZTF19aarykkb and ZTF19aarzaod, were particularly compelling given that their location, distance, and age were consistent with the GW event, and their early optical light curves were photometrically consistent with that of kilonovae. These two candidates were spectroscopically classi fi ed as young core-collapse supernovae. The remaining candidates were ruled out as supernovae. Palomar Gattini-IR did not identify any viable candidates with multiple detections only after merger time. We demonstrate that even with single-detector GW events localized to thousands of square degrees, systematic kilonova discovery is feasible. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Gravitational wave astronomy en_US
dc.subject Transient detection ( 1957 ) en_US
dc.subject Optical telescopes ( 1174 ) en_US
dc.title GROWTH on S190425z: Searching Thousands of Square Degrees to Identify an Optical or Infrared Counterpart to a Binary Neutron Star Merger with the Zwicky Transient Facility and Palomar Gattini-IR en_US
dc.type Article en_US

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