Discovery of TeV gamma-ray emission from the pulsar wind nebula 3C 58 by MAGIC
arXiv:1509.09173 · doi:10.1051/epjconf/201612104007
Abstract
The pulsar wind nebula (PWN) 3C 58 has been proposed as a good candidate for detection at VHE (VHE; E>100 GeV) for many years. It is powered by one of the highest spin-down power pulsars known (5\% of Crab pulsar) and it has been compared to the Crab Nebula due to its morphology. This object was previously observed by imaging atmospheric Cherenkov telescopes (Whipple, VERITAS and MAGIC), and upper limit of 2.4\% Crab Unit (C.U.) at VHE. It was detected by Fermi-LAT with a spectrum extending beyond 100 GeV. We analyzed 81 hours of 3C 58 data taken with the MAGIC telescopes and we detected VHE gamma-ray emission with a significance of 5.7 sigma and an integral flux of 0.65\% C.U. above 1 TeV. We report the first significant detection of PWN 3C 58 at TeV energies. According to our results 3C 58 is the least luminous VHE gamma-ray PWN ever detected at VHE and the one with the lowest flux at VHE to date. We compare our results with the expectations of time-dependent models in which electrons up-scatter photon fields. The best representation favors a distance to the PWN of 2 kpc and Far Infrared (FIR) comparable to CMB photon fields. If we consider an unexpectedly high FIR density according to GALPROP, the data can also be reproduced by models assuming a 3.2 kpc distance. A low magnetic field, far from equipartition, is required to explain the VHE data. Hadronic contribution from the hosting supernova remnant (SNR) requires an unrealistic energy budget given the density of the medium, disfavoring cosmic ray acceleration in the SNR as origin of the VHE gamma-ray emission.
arXiv commentProceedings of the 34th International Cosmic Ray Conference, 30 July- 6 August, 2015, The Hague, The Netherlands. The content of this submission is similar to our paper in the Fermi Symposium of 3C 58 discovery, which appeared as arXiv:1501.06405. arXiv admin note: substantial text overlap with arXiv:1501.06405
References in corpus (22)
- The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
- The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula
- The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration
- Young core collapse supernova remnants and their supernovae
- Performance of the MAGIC stereo system obtained with Crab Nebula data
- Modeling the spectral evolution of PWNe inside SNRs
- New Constraints on the Structure and Evolution of the Pulsar Wind Nebula 3C 58
- Inverse Compton Emission from Galactic Supernova Remnants: Effect of the Interstellar Radiation Field
- A Model of the Spectral Evolution of Pulsar Wind Nebulae
- Discovery of X-ray Pulsations from the Compact Central Source in the Supernova Remnant 3C 58
- Time-dependent modeling of pulsar wind nebulae: Study on the impact of the diffusion-loss approximations
- Gamma-rays from the pulsar wind nebulae
- MARS, the MAGIC Analysis and Reconstruction Software
- The X-ray nebula of the filled center supernova remnant 3C58 and its interaction with the environment
- The Infrared Detection of the Pulsar Wind Nebula in the Galactic Supernova Remnant 3C 58
- Properties of Young Pulsar Wind Nebulae: TeV Detectability and Their Pulsar Properties
- A Thorough Investigation of Distance and Age of the Pulsar Wind Nebula 3C58
- ASCA Observation of the Crab-Like Supernova Remnant 3C58
- Radio Spectral Index and Expansion of 3C58
- An energy-conserving, particle dominated, time-dependent model of 3C58 and its observability at high-energies
- TeV Gamma-rays from the Northern Sky Pulsar Wind Nebulae
- Physics performance of the upgraded MAGIC telescopes obtained with Crab Nebula data