• Swift CALDB updated (13 Jan 2021)
    The Swift SC caldb has been updated (update version 20210113) to updated the clock correction file to v140 ...
  • Swift and NICER Show that the X-ray Outburst of Cen X-4 has Ended (13 Jan 2021)
    Observations with NICER and Swift, along with ground-based observations, suggest that the Cen X-4 has returned to quiescence
  • Hera and WebSpec short downtime on Wednesday, January 13th, 2:00pm EST (19:00 UTC) (11 Jan 2021)
    Hera and WebSpec will stop working at around 2:00pm EST (19:00 UTC) on Wednesday, January 13th, in order for the HEASARC to update some infrastructure. The downtime could last up to an hour.
  • Swift and NICER Indicate a Rare X-ray Outburst of Cen X-4 (06 Jan 2021)
    Following indications from ground-based observations, X-ray observations by Swift and NICER show a sudden X-ray brightening of the nearby low-mass X-ray binary Cen X-4, suggesting the onset of a rare X-ray outburst
  • NuSTAR Cycle 7 Due Date January 29, 2021 (5 Jan 2021)
    Phase-1 science proposals are due by 4:30 p.m. EST, January 29, 2021. Please see the Guide for Proposers and the Guidelines for Anonymous Proposals for more details.
  • NuSTAR Caldb Update (05 Jan 2021)
    The NuSTAR FPM caldb has been updated to version 20210104. This release includes a new clock correction file, v114. Please see the release notes for more details.