Looking for optical counterparts of still unidentified TeV gamma-ray sources

PARISI, P.; MASETTI, N.; LANDI, R.; PALAZZI, E.; MCBRIDE, V. A.; MASON, E.; BASSANI, L.; BAZZANO, A.; BIRD, A. J.; CELLONE, S. A.; CHARLES, P. A.; DEAN, J.; MALIZIA, A.; ROMERO, G. E.; STEPHEN, J. B.; UBERTINI P.

Montreal, Canadá

Congreso; High-Energy Acceleration Processes in Supernova Remnants, PWNe, MicroBlazars and Binaries: the keV to TeV Connection, 37th COSPAR Scientific Assembly; 2008

Committee on Space Research (COSPAR)

The observations of the inner part of our Galaxy performed by HESS (High Energy Stereoscopic System) Cherenkov Telescopes have revealed the presence of a number of objects at TeV energies, some of which still lack an identification. Plausible counterparts are pulsar wind nebulae (PWN), supernova remnants (SNR) and X-ray binary systems. Followup X-ray observations with Swift were performed in the past to achieve better positional constraints on some unidentified HESS sources. We have then performed optical spectroscopy on selected optical objects associated with detected X-ray sources within or near the high-energy error box of these TeV objects. Here we report the preliminary results of this campaign.