NSF award 2606779 · Princeton University

Collaborative Research: Uncovering Neutron Star and Black Hole Engines of Ultraluminous X-ray Sources with Radiative GRMHD Simulations

Final report due

29 December 2029

in 1,168 days · The award ends on 31 August 2029.

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award ending 2029-08-31 · Research.gov
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Extension request17 Jul 2029in 1003 days
award ending 2029-08-31 · Research.gov
PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice21 Aug 2029in 1038 days
award ending 2029-08-31 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due29 Dec 2029in 1168 days
award ending 2029-08-31 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due29 Dec 2029in 1168 days
award ending 2029-08-31 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out29 Dec 2029in 1168 days
award ending 2029-08-31 · Research.gov
PAPPG 24-1: “financially closed out 120 days after their expiration date”

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NSF lists this award's end date as 31 August 2029.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 29 December 2029.

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Award card

Award number: 2606779
Period of support: 1 Sep 2026 – 31 Aug 2029
Amount: $332,333
Awardee: Princeton University, Princeton, NJ
Program: STELLAR ASTRONOMY & ASTROPHYSC
Directorate: MPS

Abstract

Ultraluminous X-ray sources (ULXs) are exceptionally bright, off-center X-ray sources in galaxies that emit X-ray luminosities exceeding 10^39–10^41 erg/s, far brighter than typical X-ray binaries but below the luminosity of supermassive black holes. This has led to two competing models for explaining the nature of these extreme sources: neutron stars and intermediate-mass black holes (IMBHs). Both models have…

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