Results 91 to 100 of about 13,258 (204)

TeV radiation from the Crab nebula and other matters [PDF]

The detection of the Crab Nebula via the Cherenkov imaging technique places TeV astronomy on a secure observational footing. The motivation for TeV observations, a discussion of the atmospheric Cherenkov technique, the experimental details of the Crab ...
Lamb, R. C.
core   +1 more source

Investigating the Anticorrelation between Photon Index and Flux of the Crab Using RXTE and NuSTAR

The Astrophysical Journal
We present a systematic study of the recently reported anticorrelation between X-ray flux and photon index (Γ) in the Crab Nebula, using archival Rossi X-Ray Timing Explorer (RXTE) Proportional Counter Array (3–50 keV), RXTE High Energy X-ray Timing ...
Debjit Chatterjee, Hsiang-Kuang Chang, Dipak Debnath, Koothodil Abhijith Augustine, Tzu-Hsuan Lin   +4 more
doaj   +1 more source

Spatially Resolved Polarization Variation of the Crab Nebula

The Astrophysical Journal
We examined the spatially resolved polarization variations in the Crab Nebula over 2 yr, using observational data from the Imaging X-ray Polarimetry Explorer, and offer key insights into its magnetic field structures and evolution.
Chao Zuo, Fei Xie, Mingyu Ge, Wei Deng, Kuan Liu, Fabio La Monaca, Alessandro Di Marco, Wenhao Wei, Wei Chen   +8 more
doaj   +1 more source

The prototype Schwarzschild Couder Telescope: A Medium-Sized Telescope for the Cherenkov Telescope Array [PDF]

EPJ Web of Conferences
The Schwarzschild-Couder Telescope (SCT) is a dual-mirror telescope designed for the Cherenkov Telescope Array Observatory (CTAO) to observe very-high-energy gamma rays (20 GeV to 300 TeV).
Romana Pantaleo Francesca
doaj   +1 more source

Dynamics of the Crab Nebula [PDF]

Symposium - International Astronomical Union, 1971
Studies of the proper motion of many filaments in the Crab Nebula show that the expansion centre does not coincide with the present position of the pulsar NP 0532. Possible reasons for this difference are discussed. Estimates of the turbulent velocity within the nebula indicate that it lies in the range 100 to 300 km sec-1.
openaire   +1 more source

The theory of pulsar winds and nebulae

, 2007
We review current theoretical ideas on pulsar winds and their surrounding nebulae. Relativistic MHD models of the wind of the aligned rotator, and of the striped wind, together with models of magnetic dissipation are discussed.
A. Achterberg, A. Gruzinov, A. K. Harding, A. M. Atoyan, A. M. Atoyan, A. Melatos, A. N. Timokhin, A. Spitkovsky, A. Spitkovsky, A. Tomimatsu, B. Aschenbach, B. M. Gaensler, B. Reville, C. F. Kennel, C. F. Kennel, C.-Y. Ng, D. A. Green, D. A. Larrabee, D. B. Wilson, D. Horns, D. V. Khangoulian, E. Amato, E. Amato, E. Amato, E. Asseo, E. Swaluw van der, E. Swaluw van der, E. W. Hones Jr., F. Aharonian, F. Aharonian, F. C. Michel, F. C. Michel, F. C. Michel, F. C. Michel, F. C. Michel, F. Pacini, F. V. Coroniti, G. G. Pavlov, I. Contopoulos, I. Contopoulos, J. A. Hibschman, J. A. Hibschman, J. Arons, J. Arons, J. Bednarz, J. C. McKinney, J. D. Scargle, J. Dyks, J. G. Kirk, J. G. Kirk, J. G. Kirk, J. G. Kirk, J. H. Piddington, J. J. Hester, J. J. Hester, J. Krause-Polstorff, J. Pétri, J. Pétri, J. Pétri, J. W. M. Baars, K. Mori, L. Ball, L. Ball, L. Davis, L. Del Zanna, L. Del Zanna, L. Kuiper, M. C. Begelman, M. C. Begelman, M. C. Begelman, M. C. Weisskopf, M. F. Bietenholz, M. F. Bietenholz, M. Hoshino, M. J. Rees, M. M. Romanova, M. Ostrowski, M. P. Veron-Cetty, N. Bucciantini, N. Bucciantini, N. Bucciantini, N. Bucciantini, N. Vlahakis, P. L. Marsden, R. Buckley, R. L. Ingraham, R. T. Emmering, S. Bogovalov, S. S. Komissarov, S. S. Komissarov, S. S. Komissarov, S. V. Bogovalov, S. V. Bogovalov, S. V. Bogovalov, S. V. Bogovalov, S. V. Bogovalov, S. Zenitani, S. Zenitani, S. Zenitani, T. Chiueh, T. DeLaney, V. S. Beskin, V. S. Beskin, V. V. Usov, W. Bednarek, W. Bednarek, W. Brinkmann, Y. A. Gallant, Y. A. Gallant, Y. E. Lyubarsky, Y. E. Lyubarsky, Y. E. Lyubarsky, Y. Lyubarsky, Y. Lyubarsky, Y. Lyubarsky, Z.-Y. Li   +115 more
core   +1 more source

X-Ray Polarization Detection of the Pulsar Wind Nebula in G21.5–0.9 with IXPE

The Astrophysical Journal
We present the X-ray polarization observation of G21.5−0.9, a young Galactic supernova remnant (SNR), conducted with the Imaging X-ray Polarimetry Explorer (IXPE) in 2023 October, with a total livetime of approximately 837 ks.
Niccolò Di Lalla, Nicola Omodei, Niccolò Bucciantini, Jack T. Dinsmore, Nicolò Cibrario, Stefano Silvestri, Josephine Wong, Patrick Slane, Tsunefumi Mizuno, Michela Negro, Roger W. Romani, Riccardo Ferrazzoli, C.-Y. Ng, Miltiadis Michailidis, Yi-Jung Yang, Fei Xie, Martin C. Weisskopf, Philip Kaaret, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Alessandro Di Marco, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Javier A. Garcia, Shuichi Gunji, Jeremy Heyl, Wataru Iwakiri, Svetlana G. Jorstad, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Alan P. Marscher, Herman L. Marshall, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Fabio Muleri, Stephen L. O’Dell, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel Lawrence Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Juri Poutanen, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Carmelo Sgró, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey Tsygankov, Roberto Turolla, Jacco Vink, Kinwah Wu, Silvia Zane   +100 more
doaj   +1 more source

Abundances in the Crab Nebula

The Astrophysical Journal, 1973
The bright visual-wavelength emission lines in spectra of filaments in the Crab Nebula cannot be used to derive unique values for the relative abundances of elements there, even under a simplifying assumption that heating is due entirely to photoionization by the Crab's nonthermal continuum. However, a range of possibilities may be estimated. By mass,
openaire   +1 more source

A Model of the Spectral Evolution of Pulsar Wind Nebulae

, 2010
Recent observations suggest that many old pulsar wind nebulae (PWNe) are bright TeV gamma-ray sources without a strong X-ray counterpart. In this paper, we study the spectral evolution of PWNe taking into account the energy which was injected when they ...
Abdo, Aharonian, Albert, Atoyan, Baars, de Jager, de Jager, de Jager, Fumio Takahara, Gelfand, Macías-Pérez, Porter, Rees, Reynolds, Rybicki, Shuta J. Tanaka, Temin, Venter, Zhang   +18 more
core   +2 more sources

Discovery of TeV gamma-ray emission from the pulsar wind nebula 3C 58 by MAGIC

EPJ Web of Conferences, 2016
The pulsar wind nebula (PWN) 3C 58 is one of the historical very-high-energy (VHE; E>100 GeV) gamma-ray source candidates. It has been compared to the Crab Nebula due to their morphological similarities.
López-Coto Rubén
doaj   +1 more source