R
R. H. Nelson
Researcher at Herzberg Institute of Astrophysics
Publications - 26
Citations - 409
R. H. Nelson is an academic researcher from Herzberg Institute of Astrophysics. The author has contributed to research in topics: Light curve & Radial velocity. The author has an hindex of 7, co-authored 26 publications receiving 344 citations.
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Journal ArticleDOI
Primary Black Hole Spin in OJ 287 as Determined by the General Relativity Centenary Flare
Mauri Valtonen,Stanisław Zoła,Stanisław Zoła,Stefano Ciprini,Stefano Ciprini,Achamveedu Gopakumar,Katsura Matsumoto,Kozo Sadakane,M. R. Kidger,Kosmas Gazeas,Kari Nilsson,Andrei Berdyugin,Vilppu Piirola,Helen Jermak,Kiran S. Baliyan,F. Alicavus,David Boyd,M. Campas Torrent,F. Campos,J. Carrillo Gómez,Daniel B. Caton,V. H. Chavushyan,J. Dalessio,B. Debski,Dinko Dimitrov,Marek Drozdz,H. Er,Ahmet Erdem,A. Escartin Pérez,V. Fallah Ramazani,Alexei V. Filippenko,Shashikiran Ganesh,F. Garcia,F. Gómez Pinilla,Maheswar Gopinathan,J. B. Haislip,René Hudec,René Hudec,G. Hurst,K. M. Ivarsen,Martin Jelínek,Arti Joshi,Masato Kagitani,Navpreet Kaur,William C. Keel,Aaron P. LaCluyze,Byeong-Cheol Lee,Byeong-Cheol Lee,Elina Lindfors,J. Lozano de Haro,J. P. Moore,Markus Mugrauer,R. Naves Nogues,A. W. Neely,R. H. Nelson,Waldemar Ogloza,S. Okano,Jeewan C. Pandey,M. Perri,M. Perri,Pauli Pihajoki,Gary Poyner,Judith L. Provencal,T. Pursimo,A. Raj,A. Raj,Daniel E. Reichart,R. Reinthal,S. Sadegi,Takeshi Sakanoi,J.-L. Salto González,Sameer,T. Schweyer,T. Schweyer,Michal Siwak,F. C. Soldán Alfaro,Eda Sonbas,Iain A. Steele,John T. Stocke,Jan Strobl,L. O. Takalo,Toma Tomov,L. Tremosa Espasa,J. R. Valdes,J. Valero Pérez,F. Verrecchia,F. Verrecchia,James R. Webb,Mizuki Yoneda,M. Zejmo,WeiKang Zheng,J. H. Telting,J. Saario,T. M. Reynolds,Andreas Kvammen,E. Gafton,R. Karjalainen,Jussi Harmanen,Pere Blay +98 more
TL;DR: In this paper, a quasi-periodic quasar with roughly 12-year optical cycles displays prominent outbursts that are predictable in a binary black hole model, and the model predicted a major optical outburst in 2015 December.
Journal ArticleDOI
Primary black hole spin in OJ287 as determined by the General Relativity centenary flare
Mauri Valtonen,Staszek Zola,S. Ciprini,Achamveedu Gopakumar,Katsura Matsumoto,Kozo Sadakane,M. R. Kidger,Kosmas Gazeas,Kari Nilsson,Andrei Berdyugin,Vilppu Piirola,Helen Jermak,Kiran S. Baliyan,F. Alicavus,David Boyd,M. Campas Torrent,F. Campos,J. Carrillo Gómez,Daniel B. Caton,V. H. Chavushyan,J. Dalessio,B. Debski,Dinko Dimitrov,Marek Drozdz,H. Er,Ahmet Erdem,A. Escartin Pérez,V. Fallah Ramazani,Alexei V. Filippenko,Shashikiran Ganesh,F. Garcia,F. Gómez Pinilla,Maheswar Gopinathan,J. B. Haislip,René Hudec,G. Hurst,K. M. Ivarsen,Martin Jelínek,Arti Joshi,Masato Kagitani,Navpreet Kaur,William C. Keel,A. P. LaCluyze,Byeong-Cheol Lee,Elina Lindfors,J. Lozano de Haro,J. P. Moore,Markus Mugrauer,R. Naves Nogues,A. W. Neely,R. H. Nelson,Waldemar Ogloza,S. Okano,Jeewan C. Pandey,M. Perri,Pauli Pihajoki,Gary Poyner,Judith L. Provencal,T. Pursimo,A. Raj,Daniel E. Reichart,R. Reinthal,S. Sadegi,Takeshi Sakanoi,J.-L. Salto González,Tassilo Schweyer,Michal Siwak,F. C. Soldán Alfaro,Eda Sonbas,Iain A. Steele,John T. Stocke,Jan Strobl,L. O. Takalo,Toma Tomov,L. Tremosa Espasa,J. R. Valdes,J. Valero Pérez,F. Verrecchia,James R. Webb,Mizuki Yoneda,M. Zejmo,WeiKang Zheng,J. H. Telting,J. Saario,T. M. Reynolds,Andreas Kvammen,E. Gafton,R. Karjalainen,Jussi Harmanen,Pere Blay +89 more
TL;DR: In this article, the authors 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.
Journal ArticleDOI
Authenticating the presence of a relativistic massive black hole binary in OJ 287 using its general relativity centenary flare: improved orbital parameters
Lankeswar Dey,Mauri Valtonen,Achamveedu Gopakumar,Stanisław Zoła,Stanisław Zoła,René Hudec,René Hudec,Pauli Pihajoki,Stefano Ciprini,Stefano Ciprini,Katsura Matsumoto,Kozo Sadakane,M. R. Kidger,Kari Nilsson,Seppo Mikkola,A. Sillanpää,L. O. Takalo,Harry Lehto,Andrei Berdyugin,Vilppu Piirola,Helen Jermak,Kiran S. Baliyan,T. Pursimo,Daniel B. Caton,F. Alicavus,A. Baransky,Pere Blay,P. Boumis,David Boyd,M. Campas Torrent,F. Campos,J. Carrillo Gómez,Sudeep Chandra,V. H. Chavushyan,J. Dalessio,B. Debski,Marek Drozdz,H. Er,Ahmet Erdem,A. Escartin Pérez,V. Fallah Ramazani,Alexei V. Filippenko,E. Gafton,Shashikiran Ganesh,F. Garcia,Kosmas Gazeas,V. Godunova,F. Gómez Pinilla,Maheswar Gopinathan,J. B. Haislip,Jussi Harmanen,G. Hurst,Jan Janík,Martin Jelínek,Martin Jelínek,Arti Joshi,Masato Kagitani,R. Karjalainen,Navpreet Kaur,William C. Keel,Vladimir Kouprianov,Vladimir Kouprianov,T. Kundera,Sebastian Kurowski,Andreas Kvammen,Aaron P. LaCluyze,Byeong-Cheol Lee,Byeong-Cheol Lee,Alexios Liakos,Elina Lindfors,J. Lozano de Haro,Markus Mugrauer,R. Naves Nogues,A. W. Neely,R. H. Nelson,Waldemar Ogloza,S. Okano,Urszula Pajdosz-Śmierciak,Jeewan C. Pandey,M. Perri,M. Perri,Gary Poyner,Judith L. Provencal,A. Raj,Daniel E. Reichart,R. Reinthal,T. M. Reynolds,J. Saario,S. Sadegi,Takeshi Sakanoi,J.-L. Salto González,Sameer,T. Schweyer,T. Schweyer,A. Simon,Michal Siwak,F. C. Soldán Alfaro,Eda Sonbas,Iain A. Steele,John T. Stocke,Jan Strobl,Jan Strobl,Toma Tomov,L. Tremosa Espasa,J. R. Valdes,J. Valero Pérez,F. Verrecchia,F. Verrecchia,V. Vasylenko,James R. Webb,Mizuki Yoneda,M. Zejmo,WeiKang Zheng,P. Zielinski +113 more
TL;DR: In this article, it was shown that even the effects of certain hereditary contributions to GW emission are required to predict impact flare timings of OJ 287, and they developed an approach that incorporated this effect into the BBH model for OJ287.
Journal ArticleDOI
DN Bootis: A low mass-ratio W UMa-type contact binary
TL;DR: In this article, photoelectric BVR light curves and radial velocity curves were obtained for the HIPPARCOS discovery DN Boo at the TUG 1 National Observatory of Turkey (TUG) and Dominion Astrophysical Observatory (DAO), respectively, to determine physical nature of the variable.
Journal ArticleDOI
A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign
Stanisław Zoła,Stanisław Zoła,Mauri Valtonen,Gopal Bhatta,Arti Goyal,B. Debski,Andrzej S. Baran,J. Krzesinski,Michal Siwak,Stefano Ciprini,Achamveedu Gopakumar,Helen Jermak,Kari Nilsson,Daniel E. Reichart,Katsura Matsumoto,Kozo Sadakane,Kosmas Gazeas,M. R. Kidger,Vilppu Piirola,F. Alicavus,Kiran S. Baliyan,Andrei Berdyugin,David Boyd,M. Campas Torrent,F. Campos,J. Carrillo Gómez,Daniel B. Caton,V. H. Chavushyan,J. Dalessio,Dinko Dimitrov,Marek Drozdz,H. Er,Ahmet Erdem,A. Escartin Pérez,V. Fallah Ramazani,Alexei V. Filippenko,F. Garcia,F. Gómez Pinilla,Maheswar Gopinathan,J. B. Haislip,Jussi Harmanen,René Hudec,René Hudec,G. Hurst,K. M. Ivarsen,Martin Jelínek,Arti Joshi,Masato Kagitani,Navpreet Kaur,William C. Keel,Aaron P. LaCluyze,Byeong-Cheol Lee,Elina Lindfors,J. Lozano de Haro,J. P. Moore,Markus Mugrauer,R. Naves Nogues,A. W. Neely,R. H. Nelson,Waldemar Ogloza,S. Okano,Jeewan C. Pandey,M. Perri,Pauli Pihajoki,Gary Poyner,Judith L. Provencal,T. Pursimo,A. Raj,R. Reinthal,S. Sadegi,Takeshi Sakanoi,Sameer,J.-L. Salto González,T. Schweyer,T. Schweyer,F. C. Soldán Alfaro,N. Karaman,Eda Sonbas,Iain A. Steele,John T. Stocke,Jan Strobl,L. O. Takalo,Toma Tomov,L. Tremosa Espasa,J. R. Valdes,J. Valero Pérez,F. Verrecchia,James R. Webb,Mizuki Yoneda,M. Zejmo,WeiKang Zheng,J. H. Telting,J. Saario,T. M. Reynolds,Andreas Kvammen,E. Gafton,R. Karjalainen,Pere Blay +97 more
TL;DR: In this paper, the authors analyse the light curve in the R band of the blazar OJ287, gathered during the 2015/2016 observing season, and search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales.