gravitationally bound for a long time. This bridge of gas is a star-forming site. X-ray sources No X-rays above background were detected from either cloud during the September 20, 1966, Nike-Tomahawk rocket flight nor that of two days later. The second took off from Johnston Atoll at 17:13 UTC and reached an apogee of , with spin-stabilization at 5.6 rps. The LMC was not detected in the X-ray range 8–80 keV. Another was launched from same atoll at 11:32 UTC on October 29, 1968, to scan the LMC for X-rays. The first discrete X-ray source in Dorado was at RA Dec , and it was the Large Magellanic Cloud. This X-ray source extended over about 12° and is consistent with the Cloud. Its emission rate between 1.5–10.5 keV for a distance of 50 kpc is /s. An X-ray astronomy instrument was carried aboard a Thor missile launched from the same atoll on September 24, 1970, at 12:54 UTC and altitudes above , to search for the Small Magellanic Cloud and to extend observation of the LMC. The source in the LMC appeared extended and contained star ε Dor. The X-ray luminosity (Lx) over the range 1.5–12 keV was (). The Large Magellanic Cloud (LMC) appears in the constellations Mensa and Dorado. LMC X-1 (the first X-ray source in the LMC) is at RA Dec , and is a high-mass X-ray binary (star system) source (HMXB). Of the first five luminous LMC X-ray binaries: LMC X-1, X-2, X-3, X-4 and A 0538–66 (detected by Ariel 5 at A 0538–66), LMC X-2 is the one that is a bright low-mass X-ray binary system (LMXB) in the LMC. DEM L316 in the Cloud consists of two supernova remnants. Chandra X-ray spectra show that the hot gas shell on the upper left has an abundance of iron. This implies that the upper-left SNR is the product of a Type Ia supernova; much lower such abundance in the lower remnant belies a Type II supernova. A 16 ms X-ray pulsar is associated with SNR 0538-69.1. SNR 0540-697 was resolved using ROSAT. Gallery See also SP77 46-44 Notes External links NASA Extragalactic Database Encyclopedia of Astronomy entry SEDS LMC page Large Magellanic Cloud at Constellation Guide Dwarf barred irregular galaxies 17223 Astronomical objects known since antiquity 56- G 115 Magellanic Clouds Dorado (constellation) Mensa (constellation) Local Group