XMM-Newton Observation of GRB040223


  • GRB040223 was discovered by INTEGRAL on February 23, 2004 at 13:28 UTC in the field of view of the IBIS telescope (GCN2525).
  • The GRB was approved by the XMM-Newton Project Scientist for a ToO observation during the ongoing revolution 771.
  • The EPIC exposure was started on 2004-02-23 at 18:21 UT, less than 5 hrs after the occurrence of the burst, and lasted for a total of 42 ksec. This has been the fastest XMM-Newton ToO response to date. The pointing coordinates were RA=16h 39m 34.0s, Dec=-41deg 55' 46", as reported in the GCN/INTEGRAL NOTICE.
  • Quick-Look-Analysis of the first 7 ksec of the XMM-Newton observation of the GRB040223 field showed the presence of a bright source in the EPIC-pn and MOS cameras within the INTEGRAL error circle, XMMU J163929.9-415601 (Breitfellner, Munuera and Martos, GCN2530) at a position of R.A. (J2000) = 16h 39m 29.9s, Decl. (J2000)= -41deg 56' 1.4", with a positional accuracy better than 6 arcsec.


  • The Observation Data File (ODF) is available in the XSA here.
  • The Pipeline Products are available in the XSA here.

Quick analysis of preliminary XMM-Newton data

EPIC-pn image

The image shows the field of GRB040223, together with the IBAS error circle.


EPIC-pn light curve

Background-subtracted EPIC-pn light curve of XMMU J163929.9-415601 in the range 0.3-9.0 keV


EPIC-pn spectrum

The EPIC-pn spectrum of XMMU J163929.9-415601 is absorbed below 1 keV, consistent with an Hydrogen column density of ~1.7 1022 cm-2.
The observed flux in the 2-10 keV band is approximately 2.4 10-13 erg cm-2 s-1.