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[33.06] G266.2-1.2: Another Nonthermal Shell-Type SNR

P. Slane (Harvard-Smithsonian CfA), J.P. Hughes (Rutgers), R.J. Edgar, P.P. Plucinsky (CfA)

The newly discovered supernova remnant G266.2--1.2 (RXJ0852--462), along the line of site to the Vela SNR, was observed with ASCA for 120 ks. We find that the SNR shell is dominated by nonthermal X-rays, extending to three the class of shell-type SNRs dominated by nonthermal X-ray emission. Like G347.3--0.5, this low-latitude remnant displays discrete regions of enhanced emission along the rim together with faint nonthermal emission from the interior. We derive limits on the thermal content of the remnant, although the presence of the Vela SNR compromises our ability to seriously constrain a low temperature component. Limits placed on the amount of Sc-K emission are compared with the expected flux based upon the observed ⁴⁴Ti emission from G266.2--1.2. We also report on an X-ray source surrounded by diffuse emission at the center of the remnant.