Landing page for project EM178

We have identified the source IRAS 18293-0941 as a distant and highly obscured relativistic jet source in our Galaxy. The source was already proposed as a high-mass X-ray binary candidate in the literature back in 2010, but the new multi-wavelength evidence gathered by us strongly enhance its interest and points to a possible new microblazar. The system consists of a flat spectrum radio core and a prominent one-sided radio lobe emanating from it with negative spectral index. Proof of its binary nature relies on a solid photometric period of about 5.7 days that could also be present in the gamma-ray domain. The X-ray spectrum is well fitted by an absorbed power-law and a black body plus an iron emission line. A variety of other emission lines in the near infrared spectrum, with marked P-Cygni profiles, additionally suggest a wind from a face on accretion disk or some sort of expanding envelope. EVN+eMERLIN observations are mandatory to confirm the association of the radio emission with the source and to discriminate among possible interpretations by resolving the relativistic jet flow. This could lead to the first ever unambiguously-confirmed Galactic microblazar.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197