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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

Abstract.

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 19^mag 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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