Primary Black Hole Spin in OJ 287 as Determined by the General Relativity Centenary Flare

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Valtonen , M J , Zola , S , Ciprini , S , Gopakumar , A , Matsumoto , K , Sadakane , K , Kidger , M , Gazeas , K , Nilsson , K , Berdyugin , A , Piirola , V , Jermak , H , Baliyan , K S , Alicavus , F , Boyd , D , Torrent , M C , Campos , F , Gómez , J C , Caton , D B , Chavushyan , V , Dalessio , J , Debski , B , Dimitrov , D , Drozdz , M , Er , H , Erdem , A , Pérez , A E , Ramazani , V F , Filippenko , A V , Ganesh , S , Garcia , F , Pinilla , F G , Gopinathan , M , Haislip , J B , Hudec , R , Hurst , G , Ivarsen , K M , Jelinek , M , Joshi , A , Kagitani , M , Kaur , N , Keel , W C , LaCluyze , A P , Lee , B C , Lindfors , E , Haro , J L D , Moore , J P , Mugrauer , M , Nogues , R N , Neely , A W , Nelson , R H , Ogloza , W , Okano , S , Pandey , J C , Perri , M , Pihajoki , P , Poyner , G , Provencal , J , Pursimo , T , Raj , A , Reichart , D E , Reinthal , R , Sadegi , S , Sakanoi , T , González , J-L S , Sameer , T , Schweyer , T , Siwak , M , Alfaro , F C S , Sonbas , E , Steele , I , Stocke , J T , Strobl , J , Takalo , L O , Tomov , T , Espasa , L T , Valdes , J R , Pérez , J V , Verrecchia , F , Webb , J R , Yoneda , M , Zejmo , M , Zheng , W , Telting , J , Saario , J , Reynolds , T , Kvammen , A , Gafton , E , Karjalainen , R , Harmanen , J & Blay , P 2016 , ' Primary Black Hole Spin in OJ 287 as Determined by the General Relativity Centenary Flare ' , Astrophysical Journal Letters , vol. 819 , no. 2 , L37 , pp. L37 . https://doi.org/10.3847/2041-8205/819/2/L37

Title: Primary Black Hole Spin in OJ 287 as Determined by the General Relativity Centenary Flare
Author: Valtonen, M. J.; Zola, S.; Ciprini, S.; Gopakumar, A.; Matsumoto, K.; Sadakane, K.; Kidger, M.; Gazeas, K.; Nilsson, K.; Berdyugin, A.; Piirola, V.; Jermak, H.; Baliyan, K. S.; Alicavus, F.; Boyd, D.; Torrent, M. Campas; Campos, F.; Gómez, J. Carrillo; Caton, D. B.; Chavushyan, V.; Dalessio, J.; Debski, B.; Dimitrov, D.; Drozdz, M.; Er, H.; Erdem, A.; Pérez, A. Escartin; Ramazani, V. Fallah; Filippenko, A. V.; Ganesh, S.; Garcia, F.; Pinilla, F. Gómez; Gopinathan, M.; Haislip, J. B.; Hudec, R.; Hurst, G.; Ivarsen, K. M.; Jelinek, M.; Joshi, A.; Kagitani, M.; Kaur, N.; Keel, W. C.; LaCluyze, A. P.; Lee, B. C.; Lindfors, E.; Haro, J. Lozano de; Moore, J. P.; Mugrauer, M.; Nogues, R. Naves; Neely, A. W.; Nelson, R. H.; Ogloza, W.; Okano, S.; Pandey, J. C.; Perri, M.; Pihajoki, P.; Poyner, G.; Provencal, J.; Pursimo, T.; Raj, A.; Reichart, D. E.; Reinthal, R.; Sadegi, S.; Sakanoi, T.; González, J.-L. Salto; Sameer, [Tuntematon]; Schweyer, T.; Siwak, M.; Alfaro, F. C. Soldán; Sonbas, E.; Steele, I.; Stocke, J. T.; Strobl, J.; Takalo, L. O.; Tomov, T.; Espasa, L. Tremosa; Valdes, J. R.; Pérez, J. Valero; Verrecchia, F.; Webb, J. R.; Yoneda, M.; Zejmo, M.; Zheng, W.; Telting, J.; Saario, J.; Reynolds, T.; Kvammen, A.; Gafton, E.; Karjalainen, R.; Harmanen, J.; Blay, P.
Contributor: University of Helsinki, Department of Physics
Date: 2016-03-10
Language: eng
Number of pages: 6
Belongs to series: Astrophysical Journal Letters
ISSN: 2041-8205
URI: http://hdl.handle.net/10138/183629
Abstract: OJ 287 is a quasi-periodic quasar with roughly 12 year optical cycles. It displays prominent outbursts that are predictable in a binary black hole model. The model predicted a major optical outburst in 2015 December. We found that the outburst did occur within the expected time range, peaking on 2015 December 5 at magnitude 12.9 in the optical R -band. Based on Swift /XRT satellite measurements and optical polarization data, we find that it included a major thermal component. Its timing provides an accurate estimate for the spin of the primary black hole, ##IMG## [http://ej.iop.org/images/2041-8205/819/2/L37/apjl523055ieqn1.gif] $i =0.313pm 0.01$ . The present outburst also confirms the established general relativistic properties of the system such as the loss of orbital energy to gravitational radiation at the 2% accuracy level, and it opens up the possibility of testing the black hole no-hair theorem with 10% accuracy during the present decade.
Subject: 115 Astronomy, Space science
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