The Nuclear Spectroscopic Telescope Array ( NuSTAR ) is the first focusing hard X-ray mission in orbit and operates in the 3–79 keV range . NuSTAR ’ s sensitivity is roughly two orders of magnitude better than previous missions in this energy band thanks to its superb angular resolution .
Since its launch in 2012 June , NuSTAR has performed excellently and observed many interesting sources including four magnetars , two rotation-powered pulsars and the cataclysmic variable AE Aquarii . NuSTAR also discovered 3.76-s pulsations from the transient source SGR J1745 - 29 recently found by Swift very close to the Galactic Center , clearly identifying the source as a transient magnetar .
For magnetar 1E 1841 - 045 , we show that the spectrum is well fit by an absorbed blackbody plus broken power-law model with a hard power-law photon index of \sim 1.3 .
This is consistent with previous results by INTEGRAL and RXTE .
We also find an interesting double-peaked pulse profile in the 25–35 keV band .
For AE Aquarii , we show that the spectrum can be described by a multi-temperature thermal model or a thermal plus non-thermal model ; a multi-temperature thermal model without a non-thermal component can not be ruled out .
Furthermore , we do not see a spiky pulse profile in the hard X-ray band , as previously reported based on Suzaku observations .
For other magnetars and rotation-powered pulsars observed with NuSTAR , data analysis results will be soon available .