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Allyn F. Tennant
Researcher at Marshall Space Flight Center
Publications - 139
Citations - 4502
Allyn F. Tennant is an academic researcher from Marshall Space Flight Center. The author has contributed to research in topics: Pulsar & Polarization (electrochemistry). The author has an hindex of 33, co-authored 89 publications receiving 4084 citations.
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Journal ArticleDOI
Discovery of powerful gamma-ray flares from the Crab Nebula
Marco Tavani,Andrea Bulgarelli,V. Vittorini,A. Pellizzoni,E. Striani,E. Striani,P. A. Caraveo,Martin C. Weisskopf,Allyn F. Tennant,G. Pucella,Alessio Trois,Enrico Costa,Y. Evangelista,C. Pittori,F. Verrecchia,E. Del Monte,Riccardo Campana,M. Pilia,M. Pilia,A. De Luca,A. De Luca,I. Donnarumma,Dieter Horns,Carlo Ferrigno,Craig O. Heinke,M. Trifoglio,Fulvio Gianotti,S. Vercellone,A. Argan,Guido Barbiellini,P. W. Cattaneo,A. W. Chen,T. Contessi,Filippo D'Ammando,G. DeParis,G. Di Cocco,G. Di Persio,Marco Feroci,Arnaud Ferrari,M. Galli,A. Giuliani,M. Giusti,Claudio Labanti,I. Lapshov,Francesco Lazzarotto,Paolo Lipari,Francesco Longo,F. Fuschino,Martino Marisaldi,Sandro Mereghetti,Ennio Morelli,Elena Moretti,A. Morselli,Luigi Pacciani,F. Perotti,G. Piano,G. Piano,P. Picozza,P. Picozza,M. Prest,Massimo Rapisarda,A. Rappoldi,Alda Rubini,S. Sabatini,S. Sabatini,Paolo Soffitta,E. Vallazza,A. Zambra,D. Zanello,F. Lucarelli,P. Santolamazza,P. Giommi,L. Salotti,Giovanni F. Bignami +73 more
TL;DR: The detection of strong gamma-ray flares observed by the AGILE satellite in September 2010 and October 2007 challenge standard models of nebular emission and require power-law acceleration by shock-driven plasma wave turbulence within an approximately 1-day time scale.
Journal ArticleDOI
The ultraluminous x-ray source population from the chandra archive of galaxies
TL;DR: One hundred fifty-four discrete non-nuclear Ultra-Luminous X-ray (ULX) sources, with spectroscopically-determined intrinsic ULX luminosities greater than 1 e39 ergs/s, are identified in 82 galaxies observed with Chandra's Advanced CCD Imaging Spectrometer as mentioned in this paper.
Journal ArticleDOI
The Ultra-Luminous X-ray Source Population from the Chandra Archive of Galaxies
TL;DR: One hundred fifty-four discrete non-nuclear Ultra-Luminous X-ray (ULX) sources, with intrinsic ULX luminosities > 1e39 ergs/s, are identified in 82 galaxies observed with Chandra's Advanced CCD Imaging Spectrometer.
Journal ArticleDOI
Gamma-ray activity in the crab nebula: the exceptional flare of 2011 april
R. Buehler,Jeffrey D. Scargle,Roger Blandford,Luca Baldini,Matthew G. Baring,Andrea Belfiore,Andrea Belfiore,Andrea Belfiore,Eric Charles,James Chiang,Filippo D'Ammando,Charles D. Dermer,Stefan Funk,J. E. Grove,Alice K. Harding,E. Hays,Matthew Kerr,Francesco Massaro,M. N. Mazziotta,Roger W. Romani,P. M. Saz Parkinson,Allyn F. Tennant,Martin C. Weisskopf +22 more
TL;DR: A gamma-ray flare in the Crab nebula lasting for approximately nine days in April of 2011 was observed by the Large Area Telescope on board the Fermi satellite as discussed by the authors, where the peak photon flux was (186 +/- 6) x 10(exp -7) /square cm/s above 100 MeV.
Journal ArticleDOI
A Complete Sample of Ultraluminous X-Ray Source Host Galaxies
TL;DR: One hundred seven ultraluminous X-ray sources (ULXs) with 0.3-10.0 keV luminosities in excess of 10{sup 39} erg s{sup -1} are identified in a complete sample of 127 nearby galaxies.