Discovery of X-ray eclipses from the transient source located at only 0.1PC from Sgr A*

D. Porquet*, N. Grosso, G. Bélanger, A. Goldwurm, F. Yusef-Zadeh, R. S. Warwick, P. Predehl

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We present the discovery of X-ray eclipses with XMM-Newton from the transient source CXOGC J174540.0-290031 located at the Galactic Center at only 2.9″ (0.1 pc) South of the position of Sgr A*. In summer 2004, sharp and deep eclipses have been observed with a period of 27,961±5 s and a duration of 1,100±100 s, while no eclipses were present in Spring 2004. In the framework of semi-detached binary systems, we estimate the mass of secondary star to less than 1.0 M and the mass of the compact object to less than 60 M.

Original languageEnglish (US)
Title of host publicationX-ray Universe 2005
Number of pages2
StatePublished - 2006
EventX-ray Universe 2005 - Madrid, Spain
Duration: Sep 26 2005Sep 30 2005

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
ISSN (Print)0379-6566


OtherX-ray Universe 2005


  • Eclipses
  • Galactic center
  • X-rays

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science


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