The likely IR counterpart to the Anomalous X-ray Pulsar XTE J1810-197

Physics – Optics

Scientific paper

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Infra-Red, Optical, X-Ray, Neutron Stars, Pulsars, Variables

Scientific paper

We report on IR VLT adaptive optics (2003 October 7th; H and Ks band) and Chandra (2003 November 1st; HRC-I) ToO observations of the field of the new candidate Anomalous X--ray Pulsar (AXP) XTE J1810-197 (also known as CXOU J180951.1-194351; IAUC 8168 , IAUC 8190, ATEL #193, ATEL #195, Ibrahim et al. 2003, astro-ph/0310665, and Gotthelf et al. 2003, astro-ph/0309745). Images in the H and Ks band were obtained (effective exposure time of 42 minutes) with NAOS-CONICA (1024x1024 pixels, 0.027" pixel scale; 28"x28" Field of View) under very good sky and seeing condition (about 0.5"), resulting in an on-axis FWHM of about 0.15" for a point-like source.

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