Bamba, AyaAyaBambaTerada, YukikatsuYukikatsuTeradaHewitt, JohnJohnHewittPetre, RobertRobertPetreAngelini, LorellaLorellaAngeliniSafi-Harb, SamarSamarSafi-HarbZhou, PingPingZhouBOCCHINO, FabrizioFabrizioBOCCHINOSawada, MakotoMakotoSawada2020-05-222020-05-2220160004-637Xhttp://hdl.handle.net/20.500.12386/25067We present the first dedicated X-ray study of the supernova remnant (SNR) G32.8-0.1 (Kes 78) with Suzaku. X-ray emission from the whole SNR shell has been detected for the first time. The X-ray morphology is well correlated with the emission from the radio shell, while anti-correlated with the molecular cloud found in the SNR field. The X-ray spectrum shows not only conventional low-temperature (kT ∼ 0.6 keV) thermal emission in a non-equilibrium ionization state, but also a very high-temperature (kT ∼ 3.4 keV) component with a very low ionization timescale (∼2.7 × 10<SUP>9</SUP> cm<SUP>-3</SUP> s), or a hard nonthermal component with a photon index Γ ∼ 2.3. The average density of the low-temperature plasma is rather low, of the order of 10<SUP>-3</SUP>-10<SUP>-2</SUP> cm<SUP>-3</SUP>, implying that this SNR is expanding into a low-density cavity. We discuss the X-ray emission of the SNR, also detected in TeV with H.E.S.S., together with multi-wavelength studies of the remnant and other gamma-ray emitting SNRs, such as W28 and RCW 86. Analysis of a time-variable source, 2XMM J185114.3-000004, found in the northern part of the SNR, is also reported for the first time. Rapid time variability and a heavily absorbed hard-X-ray spectrum suggest that this source could be a new supergiant fast X-ray transient.STAMPAenArticle10.3847/0004-637X/818/1/632-s2.0-84959222366000370370800063https://iopscience.iop.org/article/10.3847/0004-637X/818/1/632016ApJ...818...63BFIS/05 - ASTRONOMIA E ASTROFISICA