M
Michael J. Pivovaroff
Researcher at Lawrence Livermore National Laboratory
Publications - 129
Citations - 10403
Michael J. Pivovaroff is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Pulsar & Axion. The author has an hindex of 41, co-authored 127 publications receiving 9192 citations. Previous affiliations of Michael J. Pivovaroff include Massachusetts Institute of Technology & University of California, Berkeley.
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Journal ArticleDOI
THE DISTRIBUTION OF RADIOACTIVE 44Ti IN CASSIOPEIA A
Brian W. Grefenstette,Chris L. Fryer,Fiona A. Harrison,Steven E. Boggs,Tracey DeLaney,J. Martin Laming,Stephen P. Reynolds,David M. Alexander,Didier Barret,Finn Erland Christensen,William W. Craig,Karl Forster,Paolo Giommi,Charles J. Hailey,Allan Hornstrup,Takao Kitaguchi,Jason E. Koglin,Laura A. Lopez,Peter H. Mao,Kristin K. Madsen,Hiromasa Miyasaka,Kaya Mori,M. Perri,Michael J. Pivovaroff,Simonetta Puccetti,Vikram Rana,Daniel Stern,Niels Jørgen Stenfeldt Westergaard,Daniel R. Wik,William W. Zhang,Andreas Zoglauer +30 more
TL;DR: In this article, a 2.4Ms NuSTAR observing campaign aimed at studying the supernova remnant Cassiopeia A (Cas A) was conducted, where spatially resolved spectroscopic analyses of the ejecta were performed to determine the Doppler shift and thus the three-dimensional velocities of the δ(44)Ti ejecta.
Journal ArticleDOI
Multiwavelength Study Of Quiescent States Of Mrk 421 With Unprecedented Hard X-Ray Coverage Provided By Nustar In 2013
Mislav Baloković,David Paneque,Grzegorz Madejski,Amy Furniss,James Chiang,Marco Ajello,David M. Alexander,Didier Barret,Didier Barret,Roger Blandford,S. E. Boggs,Finn Erland Christensen,Walter Craig,Walter Craig,K. Forster,Paolo Giommi,Brian W. Grefenstette,C. J. Hailey,Fiona A. Harrison,Allan Hornstrup,Takao Kitaguchi,Jason E. Koglin,K. K. Madsen,Peter H. Mao,Hiromasa Miyasaka,Kaya Mori,M. Perri,Michael J. Pivovaroff,Simonetta Puccetti,Vikram Rana,D. Stern,Gianpiero Tagliaferri,C. M. Urry,Niels Jørgen Stenfeldt Westergaard,W. W. Zhang,Andreas Zoglauer,S. Archambault,A. Archer,Anna Barnacka,Wystan Benbow,Ralph Bird,J. H. Buckley,V. Bugaev,Matteo Cerruti,Xuhui Chen,L. Ciupik,M. P. Connolly,Wei Cui,Hugh Dickinson,J. Dumm,J. D. Eisch,Abraham D. Falcone,Q. Feng,J. P. Finley,Henrike Fleischhack,Lucy Fortson,Sinéad M. Griffin,S. T. Griffiths,J. Grube,Geza Gyuk,M. Huetten,N. Håkansson,Jamie Holder,T. B. Humensky,C. A. Johnson,P. Kaaret,M. Kertzman,Y. Khassen,David Kieda,Michael Krause,F. Krennrich,M. J. Lang,Gernot Maier,S. McArthur,K. Meagher,P. Moriarty,T. J. N. Nelson,Daniel Nieto,R. A. Ong,N. H. Park,Martin Pohl,A. Popkow,E. Pueschel,P. T. Reynolds,Gordon T. Richards,E. Roache,Marcos Santander,G. H. Sembroski,Karlen Shahinyan,A. W. Smith,A. W. Smith,D. Staszak,I. Telezhinsky,N. W. Todd,J. V. Tucci,J. Tyler,S. Vincent,A. Weinstein,A. Wilhelm,David A. Williams,B. Zitzer,Max Ludwig Ahnen,Stefano Ansoldi,Louis Antonelli,P. Antoranz,Ana Babić,B. Banerjee,P. Bangale,U. Barres de Almeida,Juan Abel Barrio,J. Becerra González,W. Bednarek,Elisa Bernardini,B. Biasuzzi,Adrian Biland,Oscar Blanch,S. Bonnefoy,G. Bonnoli,F. Borracci,Thomas Bretz,Thomas Bretz,E. Carmona,Alessandro Carosi,Arka Chatterjee,R. Clavero,R. Clavero,Pierre Colin,E. Colombo,E. Colombo,Jose Luis Contreras,Juan Cortina,Stefano Covino,P. Da Vela,Francesco Dazzi,A. De Angelis,B. De Lotto,E. de Oña Wilhelmi,C. Delgado Mendez,F. Di Pierro,D. Dominis Prester,Daniela Dorner,Michele Doro,Michele Doro,Sabrina Einecke,D. Elsaesser,A. Fernández-Barral,D. Fidalgo,M. V. Fonseca,Ll. Font,K. Frantzen,Christian Fruck,D. Galindo,R. J. García López,R. J. García López,Markus Garczarczyk,D. Garrido Terrats,M. Gaug,P. Giammaria,D. Glawion,Nikola Godinovic,A. González Muñoz,D. Guberman,Alexander Hahn,Y. Hanabata,M. Hayashida,Jose Romero Herrera,Jose Romero Herrera,J. Hose,Dario Hrupec,Gareth Hughes,W. Idec,K. Kodani,Yusuke Konno,Hidetoshi Kubo,J. Kushida,A. La Barbera,Damir Lelas,Elina Lindfors,Saverio Lombardi,Francesco Longo,M. A. Lopez,Ruben Lopez-Coto,A. López-Oramas,E. Lorenz,Pratik Majumdar,M. Makariev,K. Mallot,G. Maneva,Marina Manganaro,Marina Manganaro,Karl Mannheim,L. Maraschi,Benito Marcote,Mosè Mariotti,M. Martinez,Daniel Mazin,Daniel Mazin,U. Menzel,Jose Miguel Miranda,R. Mirzoyan,Abelardo Moralejo,E. Moretti,D. Nakajima,Vitaly Neustroev,A. Niedzwiecki,M. Nievas Rosillo,Karen Kristina Nilsson,Kazuyoshi Nishijima,Koji Noda,Reiko Orito,A.-K. Overkemping,S. Paiano,J. Palacio,M. Palatiello,Riccardo Paoletti,J. M. Paredes,X. Paredes-Fortuny,Massimo Persic,Juri Poutanen,P. G. Prada Moroni,E. Prandini,E. Prandini,Ivica Puljak,Wolfgang Rhode,Marc Ribó,J. Rico,J. Rodriguez Garcia,Takashi Saito,Konstancja Satalecka,V. Scapin,Casper Siebken Schultz,T. Schweizer,S. N. Shore,A. Sillanpää,Julian Sitarek,I. Snidaric,Dorota Sobczyńska,Antonio Stamerra,T. Steinbring,Marcel Strzys,L. O. Takalo,H. Takami,Fabrizio Tavecchio,P. Temnikov,Tomislav Terzić,D. Tescaro,D. Tescaro,Masahiro Teshima,Masahiro Teshima,Julia Thaele,Diego F. Torres,T. Toyama,Aldo Treves,V. Verguilov,Ievgen Vovk,J. E. Ward,M. Will,M. Will,M. H. Wu,R. Zanin,J. S. Perkins,F. Verrecchia,C. Leto,Markus Böttcher,M. Villata,C. M. Raiteri,J. A. Acosta-Pulido,J. A. Acosta-Pulido,Rumen Bachev,Andrei Berdyugin,Dmitry A. Blinov,Dmitry A. Blinov,M. I. Carnerero,M. I. Carnerero,Wen Ping Chen,P. Chinchilla,P. Chinchilla,Goran Damljanović,Chakali Eswaraiah,T. S. Grishina,Sunay Ibryamov,B. Jordan,Svetlana G. Jorstad,Svetlana G. Jorstad,Manasvita Joshi,E. N. Kopatskaya,O. M. Kurtanidze,O. M. Kurtanidze,O. M. Kurtanidze,S. O. Kurtanidze,Elena G. Larionova,L. V. Larionova,Valeri M. Larionov,Georgi Latev,H. C. Lin,Alan P. Marscher,A. A. Mokrushina,D. A. Morozova,M. G. Nikolashvili,Evgeni Semkov,Paul S. Smith,A. Strigachev,Yu. V. Troitskaya,Ivan S. Troitsky,O. Vince,J. Barnes,Tolga Guver,Joseph Moody,A. C. Sadun,S. Sun,Talvikki Hovatta,Talvikki Hovatta,J. L. Richards,Walter Max-Moerbeck,A. C. R. Readhead,Anne Lähteenmäki,Merja Tornikoski,Joni Tammi,V. Ramakrishnan,R. Reinthal,Emmanouil Angelakis,Lars Fuhrmann,Ioannis Myserlis,Vassilis Karamanavis,A. Sievers,H. Ungerechts,J. A. Zensus +326 more
TL;DR: In this paper, the authors present coordinated multiwavelength observations of the bright, nearby BL Lacertae object Mrk 421 taken in 2013 January-March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, VERITAS, and other collaborations and instruments, providing data from radio to very high energy (VHE) γ-ray bands.
Journal ArticleDOI
XMM-Newton observations of PSR B1823-13 : an asymmetric synchrotron nebula around a Vela-like pulsar
Bryan Gaensler,Norbert S. Schulz,Victoria M. Kaspi,Victoria M. Kaspi,Michael J. Pivovaroff,Werner Becker +5 more
TL;DR: In this paper, the authors detect two components to the X-ray emission associated with PSR B1823-13: an elongated core of extent 30'' immediately surrounding the pulsar embedded in a fainter, diffuse component of emission 5' in extent, seen only on the southern side of the Vela pulsar.
Journal ArticleDOI
The distribution of radioactive $^{44}$Ti in Cassiopeia A
Brian W. Grefenstette,Chris L. Fryer,Fiona A. Harrison,Steven E. Boggs,Tracey DeLaney,J. Martin Laming,Stephen P. Reynolds,David M. Alexander,Didier Barret,Finn Erland Christensen,William W. Craig,Karl Forster,Paolo Giommi,Charles J. Hailey,Alan Hornstrup,Takao Kitaguchi,J. E. Koglin,Laura A. Lopez,Peter H. Mao,Kristin K. Madsen,Hiromasa Miyasaka,Kaya Mori,M. Perri,Michael J. Pivovaroff,Simonetta Puccetti,Vikram Rana,Daniel Stern,Niels Jørgen Stenfeldt Westergaard,Daniel R. Wik,William W. Zhang,Andreas Zoglauer +30 more
TL;DR: In this article, the authors performed spatially-resolved spectroscopic analyses of the supernova remnant Cassiopeia A (Cas A) to determine the Doppler shift and thus the three-dimensional velocities of the ejecta.
The Central X-Ray Point Source in Cassiopeia A
Deepto Chakrabarty,Michael J. Pivovaroff,Lars Hernquist,Jeremy S. Heyl,Jeremy S. Heyl,Ramesh Narayan +5 more
TL;DR: In this paper, an X-ray point source near the center of the 300-year old Cas A supernova remnant was detected in the Chandra/HRC data and the spectral properties and the timing limits of the point source were analyzed.