Chandra X-ray Observatory, Spitzer Satellite, Hubble Space Telescope, and GALEX Satellite.
Fast, Furious, Refined: Smaller Black Holes Can Eat Plenty
ULX-1 is located near a spiral arm of M101. The image for M101 is composed from X-ray (Chandra X-ray Observatory; Purple), Infrared (Spitzer Satellite; Red), Optical (Hubble Space Telescope; Yellow) and Ultraviolet (GALEX satellite; Blue).
