With the possible spacial association to the Fermi/LAT source 3FGL J 1330.0-3818,TOL 1326-379 may be the first one that is identified as a γ-ray emitting Fanaroff-Riley type 0 radio galaxy(FR0 RG).We analyze the～12 yr Fermi/LAT observation data of this γ-ray source and examine its association to TOL 1326-379.We show that theγ-ray source(named as J1331.0-3818)is tentatively detected with a TS value of 28.7,3FGL J 1330.0-3818 is out of the 95％containment of J1331.0-3818,and their positions are spatially separated～0°.2.4FGL J1331.3-3818 falls into the 68％containment of J1331.0-3818,suggesting that our result agrees with that reported in the Fourth Fermi LAT Source Catalog.TOL 1326-379 is out of the 95％containment of J1331.0-3818,and their positions are spatially separated～0°.4,indicating that the association between J1331.0-3818 and TOL 1326-379 is quite ambiguous.However,we do not find other possible potential radio or X-ray counterpart within the circle centered at J1331.0-3818 with a radius of 0°.4.The spectral energy distribution(SED)of TOL 1326-379 shows a bimodal feature as seen in the γ-ray emitting RGs.We fit the SED with the one-zone leptonic model and find that the average energy spectrum of J1331.0-3818 agrees with the model prediction.Assuming that J1331.0-3818 is an unidentified γ-ray source,we derive the upper-limit of the γ-ray flux for TOL 1326-379.It is not tight enough to exclude this possibility with the SED modeling.Based on these results,we cautiously argue that the γ-ray source J1331.0-3818 is associated with TOL 1326-379 and its jet radiation physic is similar to those γ-ray emitting RGs.

Wen-Jing Fu;Hai-Ming Zhang;Jin Zhang;Yun-Feng Liang;Su Yao;En-Wei Liang

Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China;School of Astronomy and Space Science,Nanjing University,Nanjing 210023,China;School of Physics,Beijing Institute of Technology,Beijing 100081,China;Max-Planck-Institute für Radioastronomie,Auf dem Hügel 69,D-53121 Bonn,Germany

天文和天体物理学研究

[1]Wen-Jing Fu;Hai-Ming Zhang;Jin Zhang;Yun-Feng Liang;Su Yao;En-Wei Liang-.Is TOL 1326-379 a Prototype of γ-Ray Emitting FR0 Radio Galaxy?)[J].天文和天体物理学研究,2022(03):47-56

FR0,3FGL,Fanaroff,J1331,4FGL,RGs,leptonic

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