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Title: Observation of supernova remnant IC 443 with the Fermi Large Area Telescope

Journal Article · · The Astrophysical Journal
 [1]
  1. Naval Research Lab. (NRL), Washington, DC (United States); National Academy of Sciences, Washington, DC (United States); et al.

Here, 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. We accurately characterize the gamma-ray emission produced by the CRs accelerated at IC 443 using the high gamma-ray statistics and broad energy coverage provided by the LAT. The emission region is extended in the energy band with θ68 = 0$$°\atop{.}$$27 ± 0fdg01(stat) ± 0$$°\atop{.}$$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. Furthermore, the combined gamma-ray spectrum (200 MeV < 2 TeV) is reproduced well by decays of neutral pions produced by a broken power-law proton spectrum with a break around 70 GeV.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
Fermi LAT Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1357575
Journal Information:
The Astrophysical Journal, Vol. 712, Issue 1; ISSN 0004-637X
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 198 works
Citation information provided by
Web of Science

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GAMMA-RAY OBSERVATIONS OF THE Be/PULSAR BINARY 1A 0535+262 DURING A GIANT X-RAY OUTBURST journal May 2011
Molecular Environment of the Supernova Remnant ic 443: Discovery of the Molecular Shells Surrounding the Remnant journal May 2014
Recombining Plasma in the Gamma-Ray-Emitting Mixed-Morphology Supernova Remnant 3c 391 journal July 2014
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG journal May 2010
FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG journal March 2012
THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION journal October 2012
THE SECOND FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS journal September 2013
FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG journal June 2015
HESS J1640-465 - an exceptionally luminous TeV  -ray supernova remnant journal February 2014
Numerical simulations of supernova remnants in turbulent molecular clouds journal October 2018
A multispectral analysis of the northeastern shell of IC 443 journal August 2019
Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9 journal September 2019
X-Ray Observations of the Supernova Remnant W 28 with Suzaku. I. Spectral Study of the Recombining Plasma journal August 2012
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Fermi – LARGE AREA TELESCOPE: ACCOMPLISHMENTS AND CHALLENGES journal January 2013
Recombining Plasma and Gamma-Ray Emission in the Mixed-morphology Supernova Remnant 3C 400.2 journal June 2017
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Supernova Shocks in Molecular Clouds: Velocity Distribution of Molecular Hydrogen journal October 2019
Runaway O-star Bow Shocks as Particle Accelerators? The Case of AE Aur Revisited journal November 2019
3FHL: The Third Catalog of Hard Fermi -LAT Sources journal September 2017
Fermi Large Area Telescope Fourth Source Catalog journal March 2020
Observational Signatures of Particle Acceleration in Supernova Remnants book January 2012
Cosmic Ray Production in Supernovae book November 2018
Fermi – LARGE AREA TELESCOPE: ACCOMPLISHMENTS AND CHALLENGES conference February 2013
The origin of galactic cosmic rays journal June 2014
The Second Fermi Large area Telescope Catalog of Gamma-Ray Pulsars text January 2013
Fermi Large Area Telescope Fourth Source Catalog text January 2020
The origin of galactic cosmic rays journal November 2013
Detection of the Characteristic Pion-Decay Signature in Supernova Remnants text January 2013
3FHL: The Third Catalog of Hard Fermi -LAT Sources text January 2017
Fermi Large Area Telescope Fourth Source Catalog collection January 2020
HESS J1640-465 - an exceptionally luminous TeV ${\gamma}$-ray supernova remnant text January 2014
Gamma-ray emission of accelerated particles escaping a supernova remnant in a molecular cloud text January 2011
Gamma-ray observations of the Be/pulsar binary 1A 0535+262 during a giant X-ray outburst text January 2011
Investigating the Cosmic-Ray Ionization Rate in the Galactic Diffuse Interstellar Medium through Observations of H3+ text January 2011
Supernova remnants: the X-ray perspective text January 2011
Search for Dark Matter Satellites using the FERMI-LAT text January 2012
Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium text January 2012
Observational signatures of particle acceleration in supernova remnants text January 2012
Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays text January 2012
Analytic Solution for Self-regulated Collective Escape of Cosmic Rays from their Acceleration Sites text January 2012
HESS J1640-465 - an exceptionally luminous TeV gamma-ray supernova remnant text January 2014
Recombining Plasma in the Gamma-ray Emitting Mixed-Morphology Supernova Remnant 3C 391 text January 2014
The origin of galactic cosmic rays text January 2014
Global Distribution of Ionizing and Recombining Plasmas in the Supernova Remnant G290.1$-$0.8 text January 2014
The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT text January 2016
3FHL: The Third Catalog of Hard Fermi-LAT Sources text January 2017
NuSTAR Detection of a Hard X-ray Source in the Supernova Remnant - Molecular Cloud Interaction Site of IC 443 text January 2018
The GeV emission in the field of the star-forming region W30 revisited text January 2019
A multispectral analysis of the northeastern shell of IC 443 text January 2019
Neutral iron line in the supernova remnant IC 443 and implications for MeV cosmic rays text January 2019
Runaway O-star Bow Shocks as Particle Accelerators? The Case of AE Aur revisited text January 2019
Supernova Shocks in Molecular Clouds: Velocity Distribution of Molecular Hydrogen text January 2019

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