Single-baseline interferometer for mJy observations
February 24, 2022
May 24, 2022
The Ventspils International Radio Astronomy Centre (VIRAC) of Ventspils University
of Applied Sciences (VeUAS) has developed an 800 m single-baseline interferometer
consisting of 32 m (IR) and 16 m (IB) radio telescopes with 15 arcseconds of angular
resolution. Irbene radio telescopes are operating at C/M/X-band (4.5-8.8 GHz).
Raw telescope data are correlated with the Software FX Correlator (SFXC)  and
output visibilities are calibrated with a ParselTongue ∗ pipeline. Data processing
techniques provide a velocity resolution of 0.088 kms −1 and spectral resolution of
0.002 MHz and enabling observations to approach the theoretical sensitivity limit
of the interferometer, at about 6 mJy for a 120 s integration. We propose to use
the Irbene interferometer for discoveries in a new age of transient astrophysics. In
this paper, we will show correlation and calibration schema and initial monitoring results.
Keywords: Galactic masers, VLBI observations, SFXC, ParselToung, high-mass proto-
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