Related papers: Gamma/hadron separation in the TAIGA experiment wi…

Advanced search for the extension of unresolved TeV sources with H.E.S.S.: First measurement of the extension of the Crab nebula at TeV energies

The resolution power of current Imaging Atmospheric Cherenkov Telescopes is presently restricted to scales of a few arcminutes. In the very high-energy (VHE; E > 100 GeV) gamma-ray regime, the measurement of source sizes that are comparable…

High Energy Astrophysical Phenomena · Physics 2019-08-14 M. Holler , D. Berge , J. Hahn , D. Khangulyan , R. D. Parsons

Discovery of VHE $\gamma$-ray emission from the SNR G54.1+0.3

We report the discovery of very high energy gamma-ray emission from the direction of the SNR G54.1+0.3 using the VERITAS ground-based gamma-ray observatory. The TeV signal has an overall significance of 6.8$\sigma$ and appears point-like…

High Energy Astrophysical Phenomena · Physics 2016-08-14 V. A. Acciari , E. Aliu , T. Arlen , T. Aune , M. Bautista , M. Beilicke , W. Benbow , D. Boltuch , S. M. Bradbury , J. H. Buckley , V. Bugaev , Y. Butt , K. Byrum , A. Cesarini , L. Ciupik , W. Cui , R. Dickherber , C. Duke , J. P. Finley , G. Finnegan , L. Fortson , A. Furniss , N. Galante , D. Gall , G. H. Gillanders , S. Godambe , E. V. Gotthelf , J. Grube , R. Guenette , G. Gyuk , D. Hanna , J. Holder , C. M. Hui , T. B. Humensky , A. Imran , P. Kaaret , N. Karlsson , M. Kertzman , D. Kieda , A. Konopelko , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , S. McArthur , A. McCann , M. McCutcheon , P. Moriarty , R. Muhkerjee , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , M. Pohl , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , E. Roache , H. J. Rose , M. Schroedter , G. H. Sembroski , G. Demet Senturk , P. Slane , A. W. Smith , D. Steele , S. P. Swordy , G. Těsić , M. Theiling , S. Thibadeau , V. V. Vassiliev , S. Vincent , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams , S. Wissel , M. Wood , B. Zitzer

Morphological properties of the Crab Nebula: a detailed multiwavelength study based on new VLA, HST, Chandra and XMM-Newton images

We present a detailed analysis of the morphological properties of the Crab Nebula across the electromagnetic spectrum based on new and previous high-quality data from radio to X-rays. In the radio range we obtained an image of the entire…

High Energy Astrophysical Phenomena · Physics 2017-05-24 G. Dubner , G. Castelletti , O. Kargaltsev , G. G. Pavlov , M. Bietenholz , A. Talavera

Axion and dark photon limits from Crab Nebula high energy gamma-rays

The observation of cosmic sub-PeV gamma-rays from the Crab Nebula opens up the possibility of testing cosmic ray photon transparency at the multi-hundred TeV scale. Assuming no deviation from a source gamma-ray emission due to accelerated…

High Energy Astrophysical Phenomena · Physics 2021-03-03 Xiao-Jun Bi , Yu Gao , Junguang Guo , Nick Houston , Tianjun Li , Fangzhou Xu , Xin Zhang

Performance of LHAASO-WCDA and Observation of Crab Nebula as a Standard Candle

The first Water Cherenkov detector of the LHAASO experiment (WCDA-1) has been operating since April, 2019. The first 10 months of data have been analyzed to test its performance by observing the Crab Nebula as a standard candle. The WCDA-1…

Instrumentation and Methods for Astrophysics · Physics 2021-01-12 LHAASO collaboration

Observations of the Crab Nebula and Pulsar with VERITAS

Observations of the Crab Nebula have proven to be the best tool to calibrate and to characterize the performance of a Cherenkov telescope. Scientifically, it is interesting to measure the energy spectrum of the Crab Nebula close to the…

Astrophysics · Physics 2019-08-13 O. Celik

The variable Crab Nebula

The remarkable Crab Nebula is powered by an energetic pulsar whose relativistic wind interacts with the inner parts of the Supernova Remnant SN1054. Despite low-intensity optical and X-ray variations in the inner Nebula, the Crab has been…

High Energy Astrophysical Phenomena · Physics 2011-06-07 Marco Tavani

New Constraints on Hidden Photons using Very High Energy Gamma-Rays from the Crab Nebula

Extensions of the standard model of particle physics, in particular those based on string theory, often predict a new U(1) gauge symmetry in a hidden sector. The corresponding gauge boson, called hidden photon, naturally interacts with the…

Astrophysics · Physics 2009-11-13 Hannes-Sebastian Zechlin , Dieter Horns , Javier Redondo

The Energy-dependent $\gamma$-ray Morphology of the Crab Nebula Observed with the Fermi Large Area Telescope

The Crab Nebula is a bright emitter of non-thermal radiation across the entire accessible range of wavelengths. The spatial and spectral structures of the synchrotron nebula are well-resolved from radio to hard X-ray emission. The un-pulsed…

High Energy Astrophysical Phenomena · Physics 2021-02-03 Paul K. H. Yeung , Dieter Horns

Observations of the Crab Nebula and Pulsar with the Large-Sized Telescope Prototype of the Cherenkov Telescope Array

CTA (Cherenkov Telescope Array) is the next generation ground-based observatory for gamma-ray astronomy at very-high energies. The Large-Sized Telescope prototype (LST-1) is located at the Northern site of CTA, on the Canary Island of La…

High Energy Astrophysical Phenomena · Physics 2025-01-16 CTA-LST Project , : , H. Abe , K. Abe , S. Abe , A. Aguasca-Cabot , I. Agudo , N. Alvarez Crespo , L. A. Antonelli , C. Aramo , A. Arbet-Engels , C. Arcaro , M. Artero , K. Asano , P. Aubert , A. Baktash , A. Bamba , A. Baquero Larriva , L. Baroncelli , U. Barres de Almeida , J. A. Barrio , I. Batkovic , J. Baxter , J. Becerra González , E. Bernardini , M. I. Bernardos , J. Bernete Medrano , A. Berti , P. Bhattacharjee , N. Biederbeck , C. Bigongiari , E. Bissaldi , O. Blanch , G. Bonnoli , P. Bordas , A. Borghese , A. Bulgarelli , I. Burelli , M. Buscemi , M. Cardillo , S. Caroff , A. Carosi , F. Cassol , D. Cauz , G. Ceribella , Y. Chai , K. Cheng , A. Chiavassa , M. Chikawa , L. Chytka , A. Cifuentes , J. L. Contreras , J. Cortina , H. Costantini , G. D'Amico , M. Dalchenko , A. De Angelis , M. de Bony de Lavergne , B. De Lotto , R. de Menezes , G. Deleglise , C. Delgado , J. Delgado Mengual , D. della Volpe , M. Dellaiera , D. Depaoli , A. Di Piano , F. Di Pierro , R. Di Tria , L. Di Venere , C. Díaz , R. M. Dominik , D. Dominis Prester , A. Donini , D. Dorner , M. Doro , D. Elsässer , G. Emery , J. Escudero , V. Fallah Ramazani , G. Ferrara , F. Ferrarotto , A. Fiasson , L. Freixas Coromina , S. Fröse , S. Fukami , Y. Fukazawa , E. Garcia , R. Garcia López , C. Gasbarra , D. Gasparrini , F. Geyer , J. Giesbrecht Paiva , N. Giglietto , F. Giordano , E. Giro , P. Gliwny , N. Godinovic , R. Grau , D. Green , J. Green , S. Gunji , J. Hackfeld , D. Hadasch , A. Hahn , K. Hashiyama , T. Hassan , K. Hayashi , L. Heckmann , M. Heller , J. Herrera Llorente , K. Hirotani , D. Hoffmann , D. Horns , J. Houles , M. Hrabovsky , D. Hrupec , D. Hui , M. Hütten , M. Iarlori , R. Imazawa , T. Inada , Y. Inome , K. Ioka , M. Iori , K. Ishio , Y. Iwamura , M. Jacquemont , I. Jimenez Martinez , J. Jurysek , M. Kagaya , V. Karas , H. Katagiri , J. Kataoka , D. Kerszberg , Y. Kobayashi , A. Kong , H. Kubo , J. Kushida , M. Lainez , G. Lamanna , A. Lamastra , T. Le Flour , M. Linhoff , F. Longo , R. López-Coto , M. López-Moya , A. López-Oramas , S. Loporchio , A. Lorini , P. L. Luque-Escamilla , P. Majumdar , M. Makariev , D. Mandat , M. Manganaro , G. Manicò , K. Mannheim , M. Mariotti , P. Marquez , G. Marsella , J. Martí , O. Martinez , G. Martínez , M. Martínez , P. Marusevec , A. Mas-Aguilar , G. Maurin , D. Mazin , E. Mestre Guillen , S. Micanovic , D. Miceli , T. Miener , J. M. Miranda , R. Mirzoyan , T. Mizuno , M. Molero Gonzalez , E. Molina , T. Montaruli , I. Monteiro , A. Moralejo , D. Morcuende , A. Morselli , K. Mrakovcic , K. Murase , A. Nagai , S. Nagataki , T. Nakamori , L. Nickel , M. Nievas , K. Nishijima , K. Noda , D. Nosek , S. Nozaki , M. Ohishi , Y. Ohtani , T. Oka , N. Okazaki , A. Okumura , R. Orito , J. Otero-Santos , M. Palatiello , D. Paneque , F. R. Pantaleo , R. Paoletti , J. M. Paredes , M. Pech , M. Pecimotika , M. Peresano , A. Pérez , E. Pietropaolo , G. Pirola , C. Plard , F. Podobnik , V. Poireau , M. Polo , E. Pons , E. Prandini , J. Prast , G. Principe , C. Priyadarshi , M. Prouza , R. Rando , W. Rhode , M. Ribó , V. Rizi , G. Rodriguez Fernandez , J. E. Ruiz , T. Saito , S. Sakurai , D. A. Sanchez , T. Šarić , Y. Sato , F. G. Saturni , B. Schleicher , F. Schmuckermaier , J. L. Schubert , F. Schussler , T. Schweizer , M. Seglar Arroyo , R. Silvia , J. Sitarek , V. Sliusar , A. Spolon , J. Strišković , M. Strzys , Y. Suda , Y. Sunada , H. Tajima , H. Takahashi , M. Takahashi , J. Takata , R. Takeishi , P. H. T. Tam , S. J. Tanaka , D. Tateishi , L. A. Tejedor , P. Temnikov , Y. Terada , K. Terauchi , T. Terzic , M. Teshima , M. Tluczykont , F. Tokanai , D. F. Torres , P. Travnicek , S. Truzzi , A. Tutone , G. Uhlrich , M. Vacula , P. Vallania , J. van Scherpenberg , M. Vázquez Acosta , V. Verguilov , I. Viale , A. Vigliano , C. F. Vigorito , V. Vitale , G. Voutsinas , I. Vovk , T. Vuillaume , R. Walter , M. Will , T. Yamamoto , R. Yamazaki , T. Yoshida , T. Yoshikoshi , N. Zywucka , K. Bernloehr , O. Gueta , K. Kosack , G. Maier , J. Watson

Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope

We report on observations of the sky region around the unidentified TeV gamma-ray source TeV J2032+4130 carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescope for a total of 65.5 hrs between 2003 and 2005. The…

Astrophysics · Physics 2009-11-11 A. Konopelko , R. W. Atkins , G. Blaylock , J. H. Buckley , Y. Butt , D. A. Carter-Lewis , O. Celik , P. Cogan , Y. C. K. Chow , W. Cui , C. Dowdall , T. Ergin , A. D. Falcone , D. J. Fegan , S. J. Fegan , J. P. Finley , P. Fortin , G. H. Gillanders , K. J. Gutierrez , J. Hall , D. Hanna , D. Horan , S. B. Hughes , T. B. Humensky , A. Imran , I. Jung , P. Kaaret , G. E. Kenny , M. Kertzman , D. B. Kieda , J. Kildea , J. Knapp , K. Kosack , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , P. Moriarty , R. Mukherjee , T. Nagai , R. A. Ong , J. S. Perkins , M. Pohl , K. Ragan , P. T. Reynolds , H. J. Rose , G. H. Sembroski , M. Schroedter , A. W. Smith , D. Steele , A. Syson , S. P Swordy , J. A. Toner , L. Valcarcel , V. V. Vassiliev , R. G. Wagner , S. P. Wakely , T. C. Weekes , R. J. White , D. A. Williams , B. Zitzer

Data analysis techniques for stereo IACT systems

Based on data and Monte-Carlo simulations of the HEGRA IACT system, improved analysis techniques were developed for the determination of the shower geometry and shower energy from the multiple Cherenkov images. These techniques allow, e.g.,…

Astrophysics · Physics 2009-10-31 W. Hofmann

A Survey of Molecular Hydrogen in the Crab Nebula

We have carried out a near-infrared, narrow-band imaging survey of the Crab Nebula, in the H2 2.12 micron and Br-gamma 2.17 micron lines, using the Spartan Infrared camera on the SOAR Telescope. Over a 2.8' x 5.1' area that encompasses…

Astrophysics of Galaxies · Physics 2015-05-27 E. D. Loh , J. A. Baldwin , Z. K. Curtis , G. J. Ferland , C. R. O'Dell , A. C. Fabian , Philippe Salomé

Probing the Turbulent Corona and Heliosphere Using Radio Spectral Imaging Observation during the Solar Conjunction of Crab Nebula

Measuring plasma parameters in the upper solar corona and inner heliosphere is challenging because of the region's weakly emissive nature and inaccessibility for most in situ observations. Radio imaging of broadened and distorted background…

Solar and Stellar Astrophysics · Physics 2025-09-12 Peijin Zhang , Surajit Mondal , Bin Chen , Sijie Yu , Dale Gary , Marin M. Anderson , Judd D. Bowman , Ruby Byrne , Morgan Catha , Xingyao Chen , Sherry Chhabra , Larry D'Addario , Ivey Davis , Jayce Dowell , Katherine Elder , Greg Hellbourg , Jack Hickish , Rick Hobbs , David Hodge , Mark Hodges , Yuping Huang , Andrea Isella , Daniel C. Jacobs , Ghislain Kemby , John T. Klinefelter , Matthew Kolopanis , Nikita Kosogorov , James Lamb , Casey J. Law , Nivedita Mahesh , Brian O'Donnell , Kathryn Plant , Corey Posner , Travis Powell , Vinand Prayag , Andres Rizo , Andrew Romero-Wolf , Jun Shi , Greg Taylor , Jordan Trim , Mike Virgin , Akshatha Vydula , Sandy Weinreb , David Woody

High Energy Astrophysics

The development of the atmospheric Cherenkov imaging technique has led to significant advances in gamma-ray detection sensitivity in the energy range from 200 GeV to 50 TeV. The Whipple Observatory 10m reflector has detected the first…

Astrophysics · Physics 2007-05-23 T. C. Weekes

Variable gamma-ray emission from the Crab Nebula: short flares and long "waves"

Gamma-ray emission from the Crab Nebula has been recently shown to be unsteady. In this paper, we study the flux and spectral variability of the Crab above 100 MeV on different timescales ranging from days to weeks. In addition to the four…

High Energy Astrophysical Phenomena · Physics 2013-02-19 E. Striani , M. Tavani , V. Vittorini , I. Donnarumma , A. Giuliani , G. Pucella , A. Argan , A. Bulgarelli , S. Colafrancesco , M. Cardillo , E. Costa , E. Del Monte , A. Ferrari , S. Mereghetti , L. Pacciani , A. Pellizzoni , G. Piano , C. Pittori , M. Rapisarda , S. Sabatini , P. Soffitta , M. Trifoglio , A. Trois , S. Vercellone , F. Verrecchia

Discovery of very high energy gamma-ray emission from Centaurus A with H.E.S.S

We report the discovery of faint very high energy (VHE, E>100 GeV) gamma-ray emission from the radio galaxy Centaurus A in observations performed with the H.E.S.S. experiment, an imaging atmospheric Cherenkov telescope array consisting of…

Cosmology and Nongalactic Astrophysics · Physics 2009-12-17 HESS Collaboration , F. Aharonian

COMPTEL gamma-ray study of the Crab nebula

We report on a study of the gamma-ray continuum emission from the Crab supernova nebula and on a search for nuclear de-excitation gamma-ray lines. Crab is the brightest continuum source in the 1-10 MeV gamma-ray sky, and its continuum…

Astrophysics · Physics 2007-05-23 R. D. van der Meulen , H. Bloemen , K. Bennett , W. Hermsen , L. Kuiper , R. P. Much , J. Ryan , V. Sch"onfelder , A. Strong

Detection of the Crab Pulsar with VERITAS above 100 GeV

We discuss the recent detection of pulsed gamma-ray emission from the Crab Pulsar above 100 GeV with the VERITAS array of atmospheric Cherenkov telescopes. Gamma-ray emission at theses energies is not expected in present pulsar models. We…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Andrew McCann

First detection of VHE gamma-ray signal from the FSRQ TON 0599

TON\,0599 (z=0.7247) belongs to the few flat spectrum radio quasars (FSRQs) detected in the very high energy (VHE, $E > 100$\,GeV) gamma-ray band. Its redshift makes it currently one of the farthest VHE gamma-ray sources. It was detected…

High Energy Astrophysical Phenomena · Physics 2026-03-17 MAGIC Collaboration , K. Abe , S. Abe , J. Abhir , A. Abhishek , V. A. Acciari , A. Aguasca-Cabot , I. Agudo , T. Aniello , S. Ansoldi , L. A. Antonelli , A. Arbet Engels , C. Arcaro , K. Asano , A. Babić , U. Barres de Almeida , J. A. Barrio , L. Barrios-Jiménez , I. Batković , J. Baxter , J. Becerra González , W. Bednarek , E. Bernardini , J. Bernete , A. Berti , J. Besenrieder , C. Bigongiari , A. Biland , O. Blanch , G. Bonnoli , Ž. Bošnjak , E. Bronzini , I. Burelli , A. Campoy-Ordaz , A. Carosi , R. Carosi , M. Carretero-Castrillo , A. J. Castro-Tirado , D. Cerasole , G. Ceribella , Y. Chai , A. Cifuentes , J. L. Contreras , J. Cortina , S. Covino , G. D'Amico , P. Da Vela , F. Dazzi , A. De Angelis , B. De Lotto , R. de Menezes , M. Delfino , J. Delgado , C. Delgado Mendez , F. Di Pierro , R. Di Tria , L. Di Venere , A. Dinesh , D. Dominis Prester , A. Donini , D. Dorner , M. Doro , L. Eisenberger , D. Elsaesser , J. Escudero , L. Foffano , L. Font , S. Fröse , S. Fukami , Y. Fukazawa , M. Garczarczyk , S. Gasparyan , M. Gaug , J. G. Giesbrecht Paiva , N. Giglietto , F. Giordano , P. Gliwny , N. Godinović , T. Gradetzke , R. Grau , D. Green , J. G. Green , P. Günther , D. Hadasch , A. Hahn , T. Hassan , L. Heckmann , J. Herrera Llorente , D. Hrupec , R. Imazawa , D. Israyelyan , I. Jiménez Martínez , J. Jiménez Quiles , J. Jormanainen , S. Kankkunen , D. Kerszberg , M. Khachatryan , J. Konrad , P. M. Kouch , H. Kubo , J. Kushida , M. Láinez , A. Lamastra , E. Lindfors , S. Lombardi , F. Longo , R. López-Coto , M. López-Moya , A. López-Oramas , S. Loporchio , A. Lorini , L. Lulić , E. Lyard , P. Majumdar , M. Makariev , G. Maneva , M. Manganaro , S. Mangano , K. Mannheim , M. Mariotti , M. Martínez , P. Maruševec , A. Mas-Aguilar , D. Mazin , S. Menchiari , S. Mender , D. Miceli , J. M. Miranda , R. Mirzoyan , M. Molero González , E. Molina , H. A. Mondal , A. Moralejo , T. Nakamori , C. Nanci , V. Neustroev , L. Nickel , C. Nigro , L. Nikolić , K. Nilsson , K. Nishijima , K. Noda , S. Nozaki , Y. Ohtani , A. Okumura , J. Otero-Santos , L. Pacciani , S. Paiano , D. Paneque , R. Paoletti , J. M. Paredes , M. Peresano , M. Persic , M. Pihet , F. Podobnik , P. G. Prada Moroni , E. Prandini , G. Principe , M. Ribó , J. Rico , C. Righi , N. Sahakyan , T. Saito , F. G. Saturni , K. Schmitz , F. Schmuckermaier , J. L. Schubert , A. Sciaccaluga , G. Silvestri , J. Sitarek , D. Sobczynska , A. Stamerra , J. Strišković , Y. Suda , H. Tajima , M. Takahashi , R. Takeishi , F. Tavecchio , P. Temnikov , K. Terauchi , T. Terzić , M. Teshima , A. Tutone , S. Ubach , J. van Scherpenberg , S. Ventura , G. Verna , I. Viale , A. Vigliano , C. F. Vigorito , V. Vitale , I. Vovk , R. Walter , F. Wersig , M. Will , T. Yamamoto , J. A. Acosta-Pulido , G. A. Borman , W. Boschin , V. Bozhilov , M. I. Carnerero , D. Carosati , C. Casadio , W. Chamani , W. P. Chen , G. Damljanovic , S. A. Ehgamberdiev , K. E. Ergashev , M. Giroletti , T. S. Grishina , M. A. Gurwell , M. K. Hallum , E. Järvelä , H. E. Jermak , S. G. Jorstad , M. D. Jovanovic , E. N. Kopatskaya , K. Kuratov , O. M. Kurtanidze , S. O. Kurtanidze , A. Lähteenmäki , E. G. Larionova , L. V. Larionova , V. M. Larionov , H. C. Lin , N. Marchili , A. P. Marscher , C. McCall , M. Minev , D. O. Mirzaqulov , I. Myserlis , M. G. Nikolashvili , T. Pursimo , C. M. Raiteri , I. Reva , S. Righini , A. C. Sadun , S. S. Savchenko , E. Semkov , P. S. Smith , I. A. Steele , M. Tornikoski , Yu. V. Troitskaya , I. S. Troitskiy , A. A. Vasilyev , M. Villata , O. Vince , Z. R. Weaver