Results 71 to 80 of about 15,098 (205)

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

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

Dusty globules in the Crab Nebula

, 2016
From existing broad-band images obtained with the Hubble Space Telescope, we located 92 globules, for which we derived positions, dimensions, orientations, extinctions, masses, proper motions, and their distributions. The globules have mean radii ranging
Elfgren, Erik, Gahm, Gösta F., Grenman, Tiia   +2 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

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

Cross Calibration of Imaging Air Cherenkov Telescopes with Fermi [PDF]

, 2010
An updated model for the synchrotron and inverse Compton emission from a population of high energy electrons of the Crab Nebula is used to reproduce the measured spectral energy distribution from radio to high energy gamma-rays.
Horns, D., Meyer, M., Zechlin, H. -S.
core  

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

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

New constraints on Lorentz Invariance violation from Crab Nebula spectrum beyond 100 TeV

European Physical Journal C: Particles and Fields, 2019
Recently two collaborations, Tibet and HAWC, presented new measurements of gamma-ray spectrum from Crab Nebula (Amenomori et al. in Phys Rev Lett 123(5):051101, 2019, arXiv:1906.05521 [astro-ph.HE]; Abeysekara et al. [HAWC Collaboration] in Astrophys. J.
Petr Satunin
doaj   +1 more source

LHAASO and Galactic cosmic rays. [PDF]

Innovation (Camb), 2022
Yang R.
europepmc   +1 more source