N49 or LMC N49 (PKS 0525-66, PKS B0525-661, PKS J0525-6604, SNR J052559-660453), also known as Brasil Nebula,Sky & Telescope, August 2004, page 12 is a supernova remnant in the Large Magellanic Cloud.
On March 5, 1979, Venera 11, Venera 12, and seven other spacecraft detected a massive burst of Gamma-ray and X-ray emissions from LMC N49 Cosmos, Carl Sagan, page 300, confirmed to be particularly strong by the first X-ray telescope, the Einstein Observatory. The N49 supernova remnant is also known as the Brasil Nebula, due to its shape resembling the outline of Brazil in some images.
References "The Einstein Observatory (HEAO-2)" https://heasarc.gsfc.nasa.gov/docs/einstein/heao2.html Harvard-Smithsonian Center for Astrophysics, "N49: A supernova remnant in the Large Magellanic Cloud"