Long duration X-ray burst from GX 3+1
ATel #327; S. Brandt, N. Lund, J. Chenevez, C. Budtz-Jorgensen (DSRI, Copenhagen), P. Goldoni, G. Belanger, A. Goldwurm (CEA, Saclay), E. Kuulkers (ESA, ESTEC)
on 2 Sep 2004; 09:11 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Niels Lund (email@example.com)
Subjects: X-ray, Request for Observations, Neutron Star
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.