Detection of High-Energy Gamma-Ray Emission from the Globular Cluster 47 Tucanae with Fermi

@article{Abdo2009DetectionOH,
  title={Detection of High-Energy Gamma-Ray Emission from the Globular Cluster 47 Tucanae with Fermi},
  author={A. A. Abdo and Markus Ackermann and Marco Ajello and William Atwood and Magnus Axelsson and Luca Baldini and Jean Ballet and Guido Barbiellini and Denis Bastieri and Brian M. Baughman and Keith C. Bechtol and Ronaldo Bellazzini and Bijan Berenji and R. D. Blandford and Elliott D. Bloom and Emanuele Bonamente and A. W. Borgland and Johan Bregeon and Alessandro Brez and Monica Brigida and Pascal Bruel and T. H. Burnett and G. A. Caliandro and R. A. Cameron and Patrizia A. Caraveo and J. M. Casandjian and Claudia Cecchi and {\"O}. Çelik and Eric Charles and Sylvain Chaty and A. Chekhtman and C. C. Cheung and James Chiang and Stefano Ciprini and Richard O. Claus and J. Cohen-Tanugi and Janet M. Conrad and S. Cutini and Charles D. Dermer and Francesco de Palma and S. W. Digel and Michael H. Dormody and Eduardo do Couto e Silva and P. Drell and Robert D. Dubois and Denis Dumora and Christian Farnier and Cecilia Favuzzi and Stephen J. Fegan and W. B. Focke and Marco Frailis and Yasushi Fukazawa and Piergiorgio Fusco and Fabio Gargano and Dario Gasparrini and Neil A. Gehrels and Stefano Germani and Berrie Giebels and Nicola Giglietto and Francesco Giordano and Tom Glanzman and Gary Lunt Godfrey and Isabelle A. Grenier and J. E. Grove and Lucas Guillemot and Sylvain Guiriec and Yoshitaka Hanabata and Alice K. Harding and Morihiro Hayashida and Elizabeth Hays and Deirdre Horan and Richard Edward Hughes and Guðlaugur J{\'o}hannesson and A. S. Johnson and R. P. Johnson and Tyrel J. Johnson and W. Neil Johnson and Tuneyoshi Kamae and Hideaki Katagiri and Nobuyuki Kawai and Matthew Kerr and J{\"u}rgen Kn{\"o}dlseder and Frederick Gabriel Ivar Kuehn and Michael Kuss and Joshua Lande and Luca Latronico and Marianne Lemoine-Goumard and Francesco Longo and Francesco Loparco and Benoit Lott and Michael N. Lovellette and Pasquale Lubrano and Alexei Makeev and Mario Nicola Mazziotta and W. Mcconville and Julie Mcenery and Christine Meurer and P. F. Michelson and W. Mitthumsiri and Tsunefumi Mizuno and Alexander A Moiseev and Claudia Del Monte and M. E. Monzani and A. Morselli and Igor V. Moskalenko and Simona Murgia and P. L. Nolan and Jay Norris and Eric Nuss and Takashi Ohsugi and Nicola Omodei and E. Orlando and J. F. Ormes and D. Paneque and J. H. Panetta and Damien Parent and V{\'e}ronique Pelassa and Marianna Pepe and Marco Pierbattista and F. Piron and T. A. Porter and S. Rain{\'o} and R. Rando and Massimiliano Razzano and Nanda Rea and Anita Reimer and O. Reimer and Thierry Reposeur and Steven M. Ritz and L. S. Rochester and A. Y. Rodr{\'i}guez and Roger W. Romani and Markus Roth and Felix Ryde and H. F.-W. Sadrozinski and David Sanchez and Andreas A. C. Sander and Pablo M. Saz Parkinson and Carmelo Sgro’ and D. A. Smith and P. D. Smith and Gloria Spandre and Paolo Spinelli and J. L. Starck and Mark S. Strickman and Daniel J. Suson and Hiroyasu Tajima and H. Takahashi and T. Tanaka and Jana Thayer and John Gregg Thayer and D. J. Thompson and Luigi Tibaldo and Diego F. Torres and Gino Tosti and Andrea Tramacere and Yasunobu Uchiyama and T. L. Usher and Vlasios Vasileiou and Neils Vilchez and Vincenzo Vitale and P. Wang and Natalie Webb and Brian Winer and Kent S. Wood and Tomi Ylinen and Marcus Ziegler},
  journal={Science},
  year={2009},
  volume={325},
  pages={845 - 848}
}
Gamma-Ray Pulsar Bonanza Most of the pulsars we know about were detected through their radio emission; a few are known to pulse gamma rays but were first detected at other wavelengths (see the Perspective by Halpern). Using the Fermi Gamma-Ray Space Telescope, Abdo et al. (p. 840, published online 2 July; see the cover) report the detection of 16 previously unknown pulsars based on their gamma-ray emission alone. Thirteen of these coincide with previously unidentified gamma-ray sources, solving… 
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References

SHOWING 1-10 OF 55 REFERENCES
EGRET upper limits to the high-energy gamma-ray emission from the millisecond pulsars in nearby globular clusters
We report upper limits to the high-energy gamma-ray emission from the millisecond pulsars (MSPs) in a number of globular clusters. The observations were done as part of an all-sky survey by the
PULSED GAMMA RAYS FROM THE MILLISECOND PULSAR J0030+0451 WITH THEFERMILARGE AREA TELESCOPE
We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar (MSP) PSR J0030+0451 with the Large Area Telescope on the Fermi Gamma-ray Space Telescope (formerly GLAST).
High-energy γ-rays from globular clusters
It is expected that specific globular clusters (GCs) can contain up to a hundred of millisecond pulsars. These pulsars can accelerate leptons at the shock waves originated in collisions of the pulsar
A Deep Chandra Survey of the Globular Cluster 47 Tucanae: Catalog of Point Sources
We have detected 300 X-ray sources within the half-mass radius (2.′79) of the globular cluster 47 Tucanae in a deep (281 ks) Chandra exposure. We perform photometry and simple spectral fitting for
PREDICTIONS OF GAMMA-RAY EMISSION FROM GLOBULAR CLUSTER MILLISECOND PULSARS ABOVE 100 MeV
The recent Fermi detection of the globular cluster (GC) 47 Tucanae highlighted the importance of modeling collective gamma-ray emission of millisecond pulsars (MSPs) in GCs. Steady flux from such
High-Energy Emission from Millisecond Pulsars
The X-ray and γ-ray spectrum of rotation-powered millisecond pulsars is investigated in a model for acceleration and pair cascades on open field lines above the polar caps. Although these pulsars
High-Resolution X-ray Imaging of a Globular Cluster Core: Compact Binaries in 47Tuc
TLDR
These observations provide the first x-ray “color-magnitude” diagram for a globular cluster and census of its compact object and binary population.
X-ray and gamma-ray emission from millisecond pulsars
We present a self-consistent model to describe X-ray and γ -ray emission from millisecond pulsars (MSPs). The X-rays of MSPs are produced by the backflow of primary charged particles from the outer
Observations of 20 Millisecond Pulsars in 47 Tucanae at 20 Centimeters
We have used a new observing system on the Parkes radio telescope to carry out a series of pulsar observations of the globular cluster 47 Tucanae at 20 cm wavelength. We detected all 11 previously
An Atlas for Interpreting γ-Ray Pulsar Light Curves
We have simulated a population of young spin-powered pulsars and computed the beaming pattern and light curves for the three main geometrical models: polar-cap emission, two-pole caustic (“slot gap”)
...
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