An Apparently Extended Infrared Counterpart to 1E 1740.7-2942

MARTÍ, J.; LUQUE-ESCAMILLA, P. L.; SÁNCHEZ-SUTIL, J. R.; MUÑOZ-ARJONILLA, A. J.; SÁNCHEZ-AYASO, E.; COMBI, J. A.; GARCÍA-HERNÁNDEZ, M. T.

The Astrophysical Journal

IOPscience

Lugar: Philadelphia; Año: 2010 vol. 721 p. 126 - 128

2041-8205

We present the results of a revised search for the near-infrared counterpart to the microquasar 1E 1740.7-2942, which has eluded identification despite the many years elapsed since its discovery. By taking into account new astrometric information, we have been successful to identify a single near-infrared source, with apparent non-stellar morphology, whose position agrees well with that of the microquasar X-ray and radio-emitting core at the subarcsecond level. The possible implications of this finding with respect to the nature of 1E 1740.7-2942 are discussed.