Latest News

• The NICER Enhanced Visibility Calculator Released (05 Oct 2021)
  The NICER Enhanced Visibility Calculator calculates NICER visibilities for targets over roughly the next 2-week period taking into account ISS orientation and target occultation by ISS structures, and other relevant constraints. These visibility intervals are more accurate than visibilities based solely on Sun and Moon avoidance
• NICER XTI CALDB Updated (20 Jul 2021)
  The NICER XTI caldb has been updated to version 20210707. This version updates the detector gain, response and effective area of the XTI and other files.
• NICER detection of possibly periodic X-ray absorption dips in MAXI J1803-298 (06 May 2021)
  New NICER observations of the X-ray transient MAXI J1803-298 shows recurrent absorption dips in the lightcurve similar to dips seen in other high-inclination X-ray binaries, and suggest a possible orbital period of 7-8 hours.
• NICER follow-up observations of MAXI J1803-298 (05 May 2021)
  Continuing NICER observations of the new X-ray transient MAXI J1803-298 show temporal and spectral properties suggestive of a hard state accreting stellar-mass black hole than a neutron star, though confirmation is still needed.
• NICER detection of periodicity in the new X-ray transient MAXI J0901-531 (19 Apr 2021)
  NICER observation of the newly-discovered X-ray transient MAXI J0901-531 found periodic X-ray variations with a period of P = 14.055 seconds, consistent with the gamma-ray period seen by Fermi.

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