Is the enigmatic source 3EG J1828+0142 a Galactic microquasar?

Y. BUTT; D. F. TORRES; G. E. ROMERO; J. M. PAREDES; M. RIBÓ; J. MARTÍ; J. COMBI; B. PUNSLY

Córsica, Francia

Workshop; New Views on MICROQUASARS, the Fourth Microquasars Workshop; 2002

The unidentified EGRET source 3EG J1828+0142, located at (l,b)¡Ö(31.9,5.8) (Hartman et al. 1999), is particularly enigmatic since it displays very high variability over timescales of months (Tompkins 1999, Torres et al. 2000). However, no blazar has yet been found within the 95% confidence contour (CC) of the gamma-ray location error-box (Punsly et al. 2000). It also has an unusually steep ¦Ã-ray spectral index of ¦£=2.76¡À0.39. A multifrequency study of this source has been initiated and may reveal the presence of a novel type of compact galactic object: a microblazar. X-ray data, especially those of high spatial resolution from CHANDRA, would be particularly useful in establishing such a connection.