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We present the analysis of Fermi Large Area Telescope (LAT) $\gamma$-ray observations of HB~21 (G89.0+4.7). We detect significant $\gamma$-ray emission associated with the remnant: the flux >100 MeV is…

High Energy Astrophysical Phenomena · Physics 2015-06-17 G. Pivato , J. Hewitt , L. Tibaldo , F. Acero , J. Ballet , T. J. Brandt , F. de Palma , F. Giordano , G. H. Janssen , G. Johannesson , D. A. Smith

The discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. W51C is a middle-aged remnant (~10^4 yr) with intense…

High Energy Astrophysical Phenomena · Physics 2012-08-27 Fermi LAT collaboration

CTB 109 (G109.1-1.0) is a Galactic supernova remnant (SNR) with a hemispherical shell morphology in X-rays and in the radio band. In this work we report the detection of {\gamma}-ray emission coincident with CTB 109, using 37 months of data…

High Energy Astrophysical Phenomena · Physics 2015-06-05 Daniel Castro , Patrick Slane , Donald C. Ellison , Daniel J. Patnaude

We report the discovery of extended gamma-ray emission measured by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the region of the supernova remnant (SNR) HB3 (G132.7+1.3) and the W3 HII complex adjacent to…

High Energy Astrophysical Phenomena · Physics 2016-02-17 H. Katagiri , K. Yoshida , J. Ballet , M. H. Grondin , Y. Hanabata , J. W. Hewitt , H. Kubo , M. Lemoine-Goumard

We analyze 3.5 years of public Fermi/LAT data around the position of the supernova remnant HB 21, where four point-like sources from the 2nd Fermi/LAT catalog are located. We determine that the gamma-ray source is produced by a single…

High Energy Astrophysical Phenomena · Physics 2012-10-01 Ignasi Reichardt , Emma de Oña Wilhelmi , Javier Rico , Rui-zhi Yang

We investigate the nature of the accelerated particles responsible for the production of the gamma-ray emission observed from the middle-aged supernova remnant (SNR) HB 21. The analysis of more than nine years of Fermi LAT data leads to the…

High Energy Astrophysical Phenomena · Physics 2019-02-19 L. Ambrogi , R. Zanin , S. Casanova , E. De Ona Wilhelmi , G. Peron , F. Aharonian

The middle-aged supernova remnant (SNR) W51C is an interesting source for the interaction of the shell with a molecular cloud. The shell emits intense radio synchrotron photons, and high-energy gamma-rays from the remnant have been detected…

High Energy Astrophysical Phenomena · Physics 2015-05-18 Jun Fang , Li Zhang

We present an analysis of the gamma-ray data obtained with the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the direction of SNR W49B (G43.3-0.2). A bright unresolved gamma-ray source detected at a significance…

High Energy Astrophysical Phenomena · Physics 2015-05-19 LAT Collaboration

A 5.5-year Fermi LAT gamma-ray observation shows significant extended emission at the position of the supernova remnant HB9 (G160.9+2.6). The significance of the detection above the background for photon energies above 0.2 GeV is…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Miguel Araya

This work reports on the detection of $\gamma$-ray emission coincident with the supernova remnant (SNR) SNR G5.7-0.1 using data collected by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope. The SNR is believed to be…

High Energy Astrophysical Phenomena · Physics 2016-01-13 Timothy Joubert , Daniel Castro , Patrick Slane , Joseph Gelfand

We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0-4622 with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. In the Fermi LAT data, we find a spatially extended source at the location of…

High Energy Astrophysical Phenomena · Physics 2011-10-06 T. Tanaka , A. Allafort , J. Ballet , S. Funk , F. Giordano , J. Hewitt , M. Lemoine-Goumard , H. Tajima , O. Tibolla , Y. Uchiyama

Gamma-ray emission provides constraints on the non-thermal radiation processes at play in astrophysical particle accelerators. This allows both the nature of accelerated particles and the maximum energy that they can reach to be determined.…

High Energy Astrophysical Phenomena · Physics 2023-11-06 Pauline Chambery , Marianne Lemoine-Goumard , Armelle Jardin-Blicq , Atreyee Sinha , J. Eagle

With the 15 yrs of Pass 8 data recorded by the {\em Fermi} Large Area Telescope, we report the detection of an extended gigaelectronvolt emission component with a 68\% containment radius of $0^{\circ}\!.85$, which is spatially associated…

High Energy Astrophysical Phenomena · Physics 2024-11-01 Xiaolei Guo , Xi Liu

We present detailed analysis of the two gamma-ray sources,1FGL J1801.3-2322c and 1FGL J1800.5-2359c,that have been found toward the supernova remnant(SNR) W28 with the Large Area Telescope(LAT) on board the Fermi Gamma-ray Space…

High Energy Astrophysical Phenomena · Physics 2016-04-13 LAT Collaboration , A. A. Abdo

We report the detection of gamma-ray emission coincident with three supernova remnants (SNRs) using data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. W41, MSH 17-39, and G337.0-0.1 are SNRs known to be…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Daniel Castro , Patrick Slane , Ashley Carlton , Enectali Figueroa-Feliciano

We present a detailed analysis of the GeV gamma-ray emission toward the supernova remnant (SNR) G8.7-0.1 with the Large Area Telescope (LAT) onboard the \emph{Fermi} Gamma-ray Space Telescope. An investigation of the relationship among…

High Energy Astrophysical Phenomena · Physics 2015-05-30 LAT Collaboration

The W51 complex hosts the supernova remnant W51C which is known to interact with the molecular clouds in the star forming region W51B. In addition, a possible pulsar wind nebula CXO J192318.5+140305 was found likely associated with the…

High Energy Astrophysical Phenomena · Physics 2015-06-03 MAGIC Collaboration , J. Aleksić , E. A. Alvarez , L. A. Antonelli , P. Antoranz , M. Asensio , M. Backes , U. Barres de Almeida , J. A. Barrio , D. Bastieri , J. Becerra González , W. Bednarek , K. Berger , E. Bernardini , A. Biland , O. Blanch , R. K. Bock , A. Boller , G. Bonnoli , D. Borla Tridon , T. Bretz , A. Cañellas , E. Carmona , A. Carosi , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , L. Cossio , S. Covino , P. Da Vela , F. Dazzi , A. De Angelis , G. De Caneva , E. De Cea del Pozo , B. De Lotto , C. Delgado Mendez , A. Diago Ortega , M. Doert , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , D. Eisenacher , D. Elsaesser , D. Ferenc , M. V. Fonseca , L. Font , C. Fruck , R. J. García López , M. Garczarczyk , D. Garrido , G. Giavitto , N. Godinović , A. González Muñoz , S. R. Gozzini , D. Hadasch , D. Häfner , A. Herrero , D. Hildebrand , J. Hose , D. Hrupec , B. Huber , F. Jankowski , T. Jogler , V. Kadenius , H. Kellermann , S. Klepser , T. Krähenbühl , J. Krause , A. La Barbera , D. Lelas , E. Leonardo , N. Lewandowska , E. Lindfors , S. Lombardi , M. López , R. López-Coto , A. López-Oramas , E. Lorenz , M. Makariev , G. Maneva , N. Mankuzhiyil , K. Mannheim , L. Maraschi , M. Mariotti , M. Martínez , D. Mazin , M. Meucci , J. M. Miranda , R. Mirzoyan , J. Moldón , A. Moralejo , P. Munar-Adrover , A. Niedzwiecki , D. Nieto , K. Nilsson , N. Nowak , R. Orito , S. Paiano , D. Paneque , R. Paoletti , S. Pardo , J. M. Paredes , S. Partini , M. A. Perez-Torres , M. Persic , M. Pilia , J. Pochon , F. Prada , P. G. Prada Moroni , E. Prandini , I. Puerto Gimenez , I. Puljak , I. Reichardt , R. Reinthal , W. Rhode , M. Ribó , J. Rico , S. Rügamer , A. Saggion , K. Saito , T. Y. Saito , M. Salvati , K. Satalecka , V. Scalzotto , V. Scapin , C. Schultz , T. Schweizer , S. N. Shore , A. Sillanpää , J. Sitarek , I. Snidaric , D. Sobczynska , F. Spanier , S. Spiro , V. Stamatescu , A. Stamerra , B. Steinke , J. Storz , N. Strah , S. Sun , T. Surić , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , O. Tibolla , D. F. Torres , A. Treves , M. Uellenbeck , P. Vogler , R. M. Wagner , Q. Weitzel , V. Zabalza , F. Zandanel , R. Zanin

We present the analysis of Fermi Large Area Telecope (LAT) data of the gamma-ray emission in the vicinity of a radio supernova remnant (SNR), G045.7$-$00.4. To study the origin of the gamma-ray emission, we also make use of the CO survey…

High Energy Astrophysical Phenomena · Physics 2022-07-12 Hai-Ming Zhang , Ruo-Yu Liu , Yang Su , Hui Zhu , Shao-Qiang Xi , Xiang-Yu Wang

The middle-aged supernova remnant (SNR) CTB 37A is known to interact with several dense molecular clouds through the detection of shocked ${\rm H_{2}}$ and OH 1720 MHz maser emission. In the present work, we use eight years of $\textit…

High Energy Astrophysical Phenomena · Physics 2020-06-24 Soheila Abdollahi , Jean ballet , Yasushi Fukazawa , Hideaki Katagiri , Benjamin Condon

We report the extended GeV $\gamma$-ray emission around the high Galactic latitude supernova remnant (SNR) DA 530 with the PASS 8 data recorded by the Fermi Large Area Telescope (Fermi-LAT). The $\gamma$-ray spectrum in the energy range of…

High Energy Astrophysical Phenomena · Physics 2023-09-13 Yuliang Xin , Xiaolei Guo
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