OBSERVATION OF SUPERNOVA REMNANT IC 443 WITH THE FERMI LARGE AREA TELESCOPE

By A. Abdo, M. Ackermann, M. Ajello, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, B. Baughman, K. Bechtol, R. Bellazzini and 162 more. 2010

205 citations recorded by the source corpus.

We report observation of the supernova remnant (SNR) IC 443 (G189.1+3.0) with the Fermi Gamma-ray Space Telescope Large Area Telescope (LAT) in the energy band between 200 MeV and 50 GeV. IC 443 is a shell-type SNR with mixed morphology located off the outer Galactic plane where high-energy emission has been detected in the X-ray, GeV and TeV gamma-ray bands. Past observations suggest IC 443 has been interacting with surrounding interstellar matter. Proximity between dense shocked molecular clouds and GeV–TeV gamma-ray emission regions detected by EGRET, MAGIC, and VERITAS suggests an interpretation that cosmic-ray (CR) particles are accelerated by the SNR. With the high gamma-ray statistics and broad energy coverage provided by the LAT, we accurately characterize the gamma-ray emission produced by the CRs accelerated at IC 443. The emission region is extended in the energy band with θ68 = 0.°27 ± 0.°01(stat) ± 0.°03(sys) for an assumed two-dimensional Gaussian profile and overlaps almost completely with the extended source region of VERITAS. Its centroid is displaced significantly from the known pulsar wind nebula (PWN) which suggests the PWN is not the major contributor in the present energy band. The observed spectrum changes its power-law slope continuously and continues smoothly to the MAGIC and VERITAS data points. The combined gamma-ray spectrum (200 MeV

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

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Citations in the corpus

OBSERVATIONS OF THE YOUNG SUPERNOVA REMNANT RX J1713.7−3946 WITH THE FERMI LARGE AREA TELESCOPE (2011, background): “In particular, X-ray and TeV gamma-ray43 observations of young SNRs such as Cas A (Hwang et al. 2004; Gotthelf et al. 2001; Albert44 et al. 2007; Abdo et al. 2010b), or RX J1713.”
SEARCH FOR DARK MATTER SATELLITES USING FERMI-LAT (2012, unknown): “However, since Sourcelike fits each energy bin indepen dently, we expected to find source candidates that were excluded from the 1FGL, either because they had non-power-Iaw spectra or they had hard spectra with too few photons to pass the 1FGL spectral analysis.”
THE FIRST FERMI-LAT CATALOG OF SOURCES ABOVE 10 GeV (2013, methodology): “The fifth radio galaxy, Cen A, is exceptional because of its proximity and also a presence of γ -ray emitting giant lobes clearly resolved with the LAT (Abdo et al. 2010d).”
THE FERMI-LAT HIGH-LATITUDE SURVEY: SOURCE COUNT DISTRIBUTIONS AND THE ORIGIN OF THE EXTRAGALACTIC DIFFUSE BACKGROUND (2010, methodology): “This procedure is correctly implemented in Abdo et al. (2010b).”
3FHL: The Third Catalog of Hard Fermi-LAT Sources (2017, methodology): “…optical depth, τ, to γ-rays that may be quantified by the cosmic γ-ray horizon (CGRH, defined as the energy at which τ= 1 as a function of redshift, Abdo et al. 2010d; Domínguez et al. 2013) and carries cosmological information (Domínguez & Prada 2013; Biteau & Williams 2015).74 Figure 16…”
THE FIRST FERMI LAT SUPERNOVA REMNANT CATALOG (2015, background): “…so we compared our results to the fluxes, indices, localizations, and extensions for extended sources that were reported in these publications (Abdo et al. 2010d; Lande et al. 2012; Castro & Slane 2010; Abdo et al. 2010c,e,f; Giordano et al. 2012; Katsuta et al. 2012; Brandt & Fermi-LAT…”
Fermi Large Area Telescope Fourth Source Catalog (2019, methodology): “Two were extensions of the Cen A lobes, which appear larger in γrays than the WMAP template that we use following Abdo et al. (2010d).”