Suzaku and Fermi observations of the supernova remnant G1.9+0.3

Search for the time evolution of the synchrotron X-ray spectrum of the youngest Galactic supernova remnant G1.9+0.3 usingSuzaku

“…In this work, we focus on the time evolution of roll-off frequency of the synchrotron spectrum from SNR G1.9+0.3 using archival Suzaku data. We found that the roll-off frequencies of both observations are in the range of ∼(3.1 − 3.7)×10 17 Hz, which are consistent with the roll-off frequencies derived by [8,9]. The roll-off frequency has been measured in several young SNRs (e.g., SN 1006 [19]).…”

“…SRCUT model describes synchrotron radiation from a PL distribution of electrons with an exponential cut-off [11]. The flux (at 1 GHz) for SRCUT is fixed at the value 1.24 Jy similar to previous studies [8,9]. PL and SRCUT models are well fitted to the data.…”

“…Using Chandra and NuStar data, Zoglauer et al [8], performed a detailed X-ray study of the SNR and found a spectral index of α ∼ 0.63, and a roll-off frequency of ν rolloff ∼3.1 × 10 17 Hz. From Suzaku 2011 observation, Gök and Ergin [9], obtained a spectral index of ∼0.61 and a roll-off frequency of ∼ 3.1 × 10 17 Hz.…”

“…Observations and Data Reduction SNR G1.9+0.3 observed with XIS on 2011 March (Obs ID: 505053010) and 2015 March (Obs ID:509003010) for ∼101 ks and ∼92 ks, respectively. A detailed spectral analysis of Suzaku observation in 2011 was previously presented in[9]. The XIS consists of four X-ray chargecoupled devices (CCDs).…”