The Neutron star Interior Composition ExploreR Mission


Current Activity:


NICER Activities

NICER Significant Events

NICER Coordinated Observations

Early Post-Launch NICER activities

  • July 13 Begin Science Program
  • June 21-July 12 Initial calibration and hardware commissioning
  • June 17 NICER uses Raster scan of Serpens X-1 to determine X-ray instrument and star tracker alignment
  • June 14 NICER is powered up, NICER is deployed, NICER range of motion is verified by robotic camera
  • June 12-13 NICER is installed on the ISS ELC2
  • June 11 2017 NICER is extracted from the Dragon trunk
Latest News
  • NICER detects X-ray pulsations from the rapidly brightening SAX J1808.4-3658 (08 Aug 2019)
    NICER monitoring of the accreting millisecond X-ray pulsar SAX J1808.4-3658 successfully recovered a 401 Hz pulsation after correcting for delays due to the known binary orbit. The time of ascending node derived from the timing solution is 27 seconds earlier than predicted, which indicates that the orbital expansion is proceeding more slowly than expected.
  • NICER detection of QPOs from EXO 1846-031 (01 Aug 2019)
    Following reports of renewed activity from the X-ray transient EXO 1846-031, NICER executed rapid follow-up observations. These observations detected a sharp QPO at 0.26 Hz. The timing and X-ray spectrum suggest that this source is a black hole X-ray binary in the hard state.
  • GSFC X-ray Technology Opens New Frontiers in Space and on Earth (24 Jul 2019)
    The Miniaturized High-Speed Modulated X-ray Source (MXS) has been chosen as NASA's 2019 Government Invention of the Year. MXS was developed by Keith Gendreau (the NICER Project Scientist) and Zaven Arzoumanian (the NICER Deputy Project Scientist) and was used in the ground calibration of NICER. It also can help generate medical images similar to a CT scan for patients on earth and for astronauts in space.
  • Ultra-luminous X-ray pulsar NGC 300 ULX1 experienced unprecedented spin evolution, study finds (31 May 2019)
    NASA's NICER image shows 22 months of X-ray data recorded by the Space Station payload during its nighttime moves between targets.
  • NASA's NICER Shows Entire Sky in X-rays in Stunning Arc Image (31 May 2019)
    NASA's NICER image shows 22 months of X-ray data recorded by the Space Station payload during its nighttime moves between targets.

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