ESO optical/IR observations of IGR J17544-2619

PELLIZZA, L. J.; CHATY, S.; NEGUERUELA, I.

Cozumel, México

Congreso; Triggering Relativistic Jets; 2005

Instituto de Astronomia, Universidad Nacional Autónoma de México (UNAM)

IGR J17544-2619 is a hard, transient X-ray source recently discovered by INTEGRAL, with flaring behaviour typical of X-ray binaries containing a neutron star or black hole. A possible optical and infrared counterpart has been proposed, with magnitudes consistent with a blue supergiant star. In this work we present new ESO optical/NIR photometric and spectroscopic observations of the counterpart candidate of IGR J17544-2619, and discuss the nature of the source.