IGR J11014-6103: a newly discovered pulsar wind nebula?

¹ ISDC data center for astrophysics, University of Geneva, chemin d’Écogia, 16 1290 Versoix, Switzerland
e-mail: lucia.pavan@unige.ch
² Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Eberhard-Karls-Universität, Sand 1, 72076 Tübingen, Germany

Received: 31 May 2011
Accepted: 9 July 2011

Abstract

Context. IGR J11014-6103 is one of the still unidentified hard X-ray INTEGRAL sources, reported for the first time in the 4th IBIS/ISGRI catalog.

Aims. We investigated the nature of IGR J11014-6103 by carrying out a multiwavelength analysis of the available archival observations performed in the direction of the source.

Methods. We present the results of the timing and spectral analysis of all the X-ray observations of IGR J11014-6103 carried out with ROSAT, ASCA, Einstein, Swift, and XMM-Newton. We used them to search for possible counterparts to the source in the optical, infrared, radio and γ-ray domain.

Results. Our analysis reveals that IGR J11014-6103 is comprised of three different X-ray emitting regions: a point-like source, an extended object, and a cometary-like “tail” (~4 arcmin). A possible radio counterpart positionally coincident with the source was also identified.

Conclusions. Based on these results, we suggest that the emission from IGR J11014-6103 is generated by a pulsar wind nebula produced by a high-velocity pulsar. IGR J11014-6103 might be the first of these systems detected with INTEGRAL IBIS/ISGRI.