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Preprint 02a/02

Observation of the AXP 1E 1048.1-5937 with XMM-Newton

E. Göhler (1), A. Tiengo (2), S. Mereghetti (3), R. Staubert (1)

(1) Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Sand 1, D-72076 Tübingen, Germany
(2) XMM-Newton Science Operation Center, Vilspa esa, Apartado 50727, 28080 Madrid, Spain
(3) Istituto di Fisica Cosmica "G.Occhialini", via Bassini 15, I-20133 Milano, Italy

in: New Visions of the X-ray Universe in the XMM-Newton and Chandra Era, eds. F. Jansen & TBD, ESA SP-488, 2002


On 28-Dec-2000 a short observation (~ 5 ksec) of the Anomalous X-ray pulsar 1E1048.1-5937 was performed with the XMM-Newton satellite.

The observation (using PN and MOS cameras) gives an improved position of this pulsar. There is no optical counterpart brighter than 19mag within the new error circle.

We found that the spectrum can be fit with the standard two component spectrum consisting of a steep power-law (GAMMA ~ 3) plus a blackbody (kT ~ 0.6 keV). The flux of ~ 4.1x10-12 erg/sec (2-10 keV) is similar to that observed in previous observations. We found no significant evidence for absorption or emission lines.

The spin period was 6.4525 ± 0.0001 sec.

Phase resolved spectroscopy shows no variability during pulsed phases, except for a small soft excess at energies below ~ 2 keV in correspondence of the minimum of the pulse.

Key words: Missions: XMM-Newton - Object: 1E1048.1-5937

Paper (253k gzip'ed Postscript including figures)

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