Long duration X-ray burst from GX 3+1

S. Brandt, N. Lund, J. Chenevez, C. Budtz-Jørgensen, P. Goldoni, G. Belanger, A. Goldwurm, E. Kuulkers

Research output: Other contributionNet publication - Internet publicationResearch

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During an observation of the Galactic Center the JEM-X instrument on INTEGRAL detected an unusally long X-ray burst from GX 3+1. The burst began on August 31 at 18:57 UTC

After an precursor spike lasting 7 s where the burst reached a flux of about 2000 mCrab in the 4 to 20 keV band the flux fell to around 500 mCrab and then decayed with an e-folding time of about 700 s. This burst appear as intermediate between the normal type-I X-ray bursts (e-folding times up to a few tens of seconds) and the very long "superbursts" (e-folding times of several hours).

Prior to the outburst the source flux was about 150 mCrab.

Follow-up observations are encouraged.
Original languageEnglish
Publication date2 Sep 2004
Publication statusPublished - 2 Sep 2004
SeriesThe Astronomer's telegram
NumberATel #327


  • x-ray
  • Request for observations
  • Neutron star

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