Low-frequency High-resolution Radio Observations of the TeV-emitting
  Blazar SHBLJ001355.9-185406
  In the framework of the unification scheme of radio-loud active galactic
nuclei, BL Lac objects and quasars are the beamed end-on counterparts of
low-power (FRI) and high-power (FRII) radio galaxies, respectively. Some BL
Lacs have been found to possess the FRII-type large-scale radio morphology,
suggesting that the parent population of BL Lacs is a mixture of low- and
high-power radio galaxies. This seems to apply only to `low frequency-peaked'
BL Lacs, since all the `high frequency-peaked' BL Lacs studied so far were
shown to host exclusively the FRI-type radio jets. While analyzing the NVSS
survey maps of the TeV detected BL Lacs, we have however discovered that the
high frequency-peaked object SHBL J001355.9-185406 is associated uniquely with
the one-sided, arcmin-scale, and edge-brightened jet/lobe-like feature
extending to the south-west from the blazar core. In order to investigate in
detail the large-scale morphology of SHBL J001355.9-185406, we have performed
low-frequency and high-resolution observations of the source at 156, 259 and
629 MHz using the Giant Metrewave Radio Telescope. Our analysis indicates that
no diffuse arcmin-scale emission is present around the unresolved blazar core,
and that the arcmin-scale structure seen on the NVSS map breaks into three
distinct features unrelated to the blazar, but instead associated with
background AGN. The upper limits for the extended radio halo around the
TeV-emitting BL Lac object SHBL J001355.9-185406 read as < 10% - 1% at
$156-629$ MHz. The fact that the integrated radio spectrum of the unresolved
blazar core is flat down to 156 MHz indicates that a self-similar character of
the jet in the source holds up to relatively large distances from the jet base.
