| dc.description.abstract | In this study, we present X-ray emission properties of Type I and Type II supernova remnants from the Milky Way and Large Magellanic Cloud galaxies, respectively, using \textitChandra} data. Supernovae, the core-collapse of massive stars or the thermonuclear disruption of white dwarfs, are rare events, occurring on average every 50 years in the Galaxy (Keane \& Kramer 2008).
The Supernova Remnants (SNR) candidates SN1006 and SN1987 were observed with the Advanced Charge Couple Device Imaging Spectrometer (ACIS) on board the Chandra X-ray Observatory and recorded into different Observation Identifiers (ObsIDs) as raw data. After reprocessing, clean data remained by applying Good Time Interval (GTI). Standard processed data were used with CIAO version 4.11 which comes with Calibration Data Base (CALDB). The data were reduced with the Chandra Interactive Analysis of Observation software (CIAO) version 4.11 to obtain the light curves and X-Ray Spectral Fitting Package (XSPEC) used for spectral fitting. X-ray spectrum was fitted using a combination of blackboy, power-law one dimensional model, and bremsstrahlung model. To improve the goodness of the fit, some parameters likes photon index, amplitude, and temperature were thawed to improve on the fit statistic and frozen some parameters like reference points and model space (hydrogen column density). The analysis results in a best fitting model of blackboy, and thermal bremsstrahlung with a reduced Chi square and some degrees of freedom (d.o.f). The objects (SN1987A and SN1006) displayed strong variability in their X-ray light curves, where the magnitude of about -15.6$\pm$0.2 for SN1987A and about -19.2$\pm$0.5 for SN1006 were obtained. From the spectra of X-rays and the model, possible emission mechanisms have been highlighted for the X-ray radiations from SN1006 and SN1987A, which were mainly thermal emission mechanisms and Blackboy emission mechanisms. | en_US |
