C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:59:36

2014A&A...563A.135Z - Astronomy and Astrophysics, volume 563A, 135-135 (2014/3-1)

Low-frequency high-resolution radio observations of the TeV-emitting blazar SHBL J001355.9-185406.


Abstract (from CDS):

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 the FRI-type radio jets, exclusively. While analyzing the NRAO VLA Sky Survey (NVSS) maps of the TeV detected BL Lacs, we have discovered, however, that the high frequency-peaked object SHBLJ001355.9-185406 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 the large-scale morphology of SHBLJ001355.9-185406 in detail, we have performed low-frequency and high-resolution observations of the source at 156, 259, and 629MHz using the Giant Metrewave Radio Telescope (GMRT). 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 SHBLJ001355.9-185406 read as <10%-1% at 156-629MHz. The fact that the integrated radio spectrum of the unresolved blazar core is flat down to 156MHz indicates that a self-similar character of the jet in the source holds up to relatively large distances from the jet base.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: individual: SHBL J001355.9-185406 - radio continuum: galaxies

CDS comments: Table 2 sources not in SIMBAD.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 2MASX J00135605-1854066 BLL 00 13 56.0424516573 -18 54 06.713080197   17.01   15.82   ~ 49 0
2 ICRF J002549.1-260212 SyG 00 25 49.15626788 -26 02 12.6149312   20.30 19.5 18.084   ~ 138 1
3 QSO B0108-079 QSO 01 10 50.0215261020 -07 41 41.102503300   19.0 19.0 19.21   ~ 50 1
4 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2495 2
5 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5594 4

    Equat.    Gal    SGal    Ecl

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