First a brief reminder of the NuSTAR mission:
NuSTAR was launched on June 13, 2012 from above the Kwajalein Atoll region. The launch vehicle was built by Orbital Sciences Corporation, a Pegasus XL rocket. The platform was the “Stargazer” L-1011 aircraft, the rocket was released and dropped for five seconds before the three-stage rocket motor ignited and put the spacecraft into a 650 km by 610 km orbit and deploying the first orbiting telescopes to focus light in the high energy X-ray (3 – 79 keV) region of the electromagnetic spectrum.
It has been two years and now We are getting some nice data including finding a pulsar in the galaxy M82.
High-energy X-rays streaming from a rare and mighty pulsar (magenta), the brightest found to date, can be seen in this new image combining multi-wavelength data from three telescopes. The bulk of a galaxy called Messier 82 (M82), or the “Cigar galaxy,” is seen in visible-light data captured by the National Optical Astronomy Observatory’s 2.1-meter telescope at Kitt Peak in Arizona. Starlight is white, and lanes of dust appear brown. Low-energy X-ray data from NASA’s Chandra X-ray Observatory are colored blue, and higher-energy X-ray data from NuSTAR are pink.
The magenta object is what’s known as an ultraluminous X-ray source, or ULX — a source of blazing X-rays. Previously, all ULXs were suspected to be massive black holes up to a few hundred times the mass of the sun. But NuSTAR spotted a pulsing of X-rays from this ULX (called M82 X-2) – a telltale sign of a pulsar, not a black hole. A pulsar is a type a neutron star — a stellar core left over from a supernova explosion — that sends out rotating beams of high-energy radiation. Scientists were surprised to find the pulsar at the root of the ULX because it shines with a luminosity that is more typical of heftier black holes.
NuSTAR data covers the X-ray energy range of 10 to 40 kiloelectron volts (keV), and Chandra covers the range .1 to 10 keV.