2020MNRAS.496..903H

Query : 2020MNRAS.496..903H

2020MNRAS.496..903H - Mon. Not. R. Astron. Soc., 496, 903-912 (2020/July-3)

A search for γ-ray emission from a sample of local Universe low-frequency selected radio galaxies.

HARVEY M., RULTEN C.B. and CHADWICK P.M.

Abstract (from CDS):

Radio galaxies are uncommon γ-ray emitters, and only low-redshift radio galaxies are detected with the Fermi Large Area Telescope (Fermi-LAT). However, they offer potential insights into the emission mechanisms of active galaxies, particularly as the alignment of their jets with respect to the Earth means that, unlike blazars, their emission is not necessarily jet dominated. We use the Fermi-LAT data to perform an unbiased survey of 78 radio galaxies from the Bologna complete sample in order to search for new γ-ray-emitting radio galaxies. We observe statistically significant γ-ray emission from four of the six known Fermi-LAT-detected radio galaxies included in this sample, and find some evidence for γ-ray emission spatially coincident with four previously undetected radio galaxies. As a large parameter space is searched, we calculate a probability distribution to compute the look-elsewhere effect. We find that these four spatially coincident sub-threshold γ-ray excesses are most likely a chance association, and are unlikely to be emission from the radio galaxies. Upper limits on flux are calculated for the radio galaxies from which no γ-ray emission is observed.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: statistical - galaxies: active - galaxies: jets - gamma-rays: galaxies

Simbad objects: 86

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Number of rows : 86
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Z 479-45 rG 00 37 05.4904711536 +25 41 56.361743556   14.8       ~ 83 0
2 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
3 NGC 326 rG 00 58 22.73535 +26 51 55.9192   14.9 13     ~ 188 1
4 NGC 383 AGN 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 821 3
5 2C 94 Sy2 01 08 52.8701830824 +13 20 14.262799812   15.19       ~ 494 2
6 Z 502-27 rG 01 19 35.00087601 +32 10 50.0619670   16 14.5     ~ 249 1
7 NGC 507 rG 01 23 39.950 +33 15 22.22   13.0       ~ 459 1
8 NGC 708 rG 01 52 46.482 +36 09 06.53 14.85 14.27 13.29 12.67 12.09 ~ 259 3
9 Z 522-118 rG 02 09 38.5601991144 +35 47 50.778945420   14.9 13.0     ~ 154 2
10 Z 538-57 Sy1 02 23 11.41124925 +42 59 31.3853324   15.71 14.81     ~ 582 2
11 Z 523-37 Bla 02 25 27.3274623754 +37 10 27.746857321   15.0   9.5   ~ 65 1
12 3C 76.1 rG 03 03 15.0210658512 +16 26 18.881230884   16.00 14.86     ~ 182 2
13 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
14 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
15 Z 541-15 rG 03 29 23.8863408096 +39 47 31.958110536   14.9       ~ 99 0
16 Z 525-41 rG 03 34 18.4162545072 +39 21 24.413823900   14.2       ~ 109 1
17 2C 349 Sy2 03 58 54.4370049840 +10 26 02.791855968   16.68 15.41     ~ 356 2
18 4C 32.15 Rad 04 00 20 +32 30.5           ~ 4 0
19 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
20 Z 145-17 Sy2 06 52 02.5060831464 +27 27 39.387328884   14.9       ~ 83 1
21 NVSS J071144+320301 Rad 07 11 44.422 +32 03 01.81           ~ 5 1
22 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 284 1
23 Z 118-54 LIN 08 03 16.5234602568 +24 40 36.389352144   15.7       ~ 44 0
24 2XMM J080535.0+240951 Sy2 08 05 35.0054956728 +24 09 50.330022516   15.46       ~ 336 1
25 4C 32.26 rG 08 41 13.0962137112 +32 24 59.720943456   14.08       ~ 79 1
26 IC 2402 LIN 08 47 59.04615 +31 47 08.3731   14.99       ~ 140 2
27 NVSS J091647+381807 rG 09 16 47.7571646064 +38 18 05.833769940           ~ 49 1
28 Z 151-55 AGN 09 18 57.9197964240 +31 51 10.798451460   15.5       ~ 64 1
29 3C 236.0 BLL 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 473 2
30 7C 103742.79+301338.00 LIN 10 40 29.9436842112 +29 57 57.795289452 19.85 16 16.05     ~ 53 1
31 NVSS J104318+313102 rG 10 43 18.398 +31 31 01.62   15       ~ 42 1
32 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
33 Z 155-59 SyG 11 05 22.8189218232 +30 09 41.606496180   15.7       ~ 63 0
34 Z 156-46 rG 11 16 34.6160545656 +29 15 17.112000564   15.02 14.90     ~ 133 1
35 Z 156-60 rG 11 18 59.3652976295 +27 54 07.004967404   15.7       ~ 42 1
36 NGC 3665 GiG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 364 1
37 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 646 1
38 NVSS J114649+352829 rG 11 46 49.39766 +35 28 28.5790           ~ 9 1
39 NVSS J120707+235423 rG 12 07 07.3651465320 +23 54 24.884547588           ~ 22 1
40 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
41 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
42 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
43 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
44 B2 1243+26 B rG 12 46 21.86992 +26 27 16.8487   19.7       ~ 47 1
45 3C 277.3 BLL 12 54 12.0071453880 +27 37 33.952663740   15.94       ~ 379 1
46 NGC 4839 BiC 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 482 3
47 NGC 4869 EmG 12 59 23.3588349024 +27 54 41.731884360 15.03 14.9 13.52 13.292 12.536 ~ 286 0
48 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
49 7C 1316+2954 BLL 13 19 04.1564797728 +29 38 34.835591976   16.620 15.7     ~ 92 1
50 NGC 5127 LIN 13 23 45.0315298080 +31 33 56.527040808   13.9       ~ 183 0
51 NGC 5141 Sy2 13 24 51.44109717 +36 22 42.7725745   13.9       ~ 192 1
52 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
53 Z 161-121 rG 13 41 50.4521371440 +26 22 12.897805224   15.3 15.3     ~ 63 3
54 Z 162-10 LIN 13 48 52.4892734448 +26 35 34.353002688   14.0       ~ 241 2
55 Z 162-21 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 502 3
56 NVSS J140000+283038 rG 14 00 00.47 +28 30 38.2           ~ 38 1
57 NGC 5532 LIN 14 16 52.9370483073 +10 48 26.616631120   13.3 12.59     ~ 364 2
58 4C 25.46 rG 14 32 41.4662315352 +24 55 17.916655008     16.5     ~ 45 1
59 Z 134-24 rG 14 44 06.2864704824 +26 01 11.459794800   15.7       ~ 29 1
60 IC 1065 Sy2 14 49 21.5927137128 +63 16 13.799495280   17.30 16.39     ~ 378 1
61 VV 204 SyG 15 04 57.1195361592 +26 00 58.455780156   15.24       ~ 299 1
62 NVSS J151404+300846 rG 15 14 04.1733109056 +30 08 47.270705424   16.47       ~ 38 0
63 NVSS J152744+285506 rG 15 27 44.4099822504 +28 55 06.607834248           ~ 77 1
64 NVSS J153015+290111 rG 15 30 10.2734781888 +29 00 30.167945712           ~ 52 0
65 3C 321 Sy1 15 31 43.46520 +24 04 18.9948   16.0   15.40   ~ 341 1
66 3C 326 Rad 15 52 24.9 +20 05 57   17.87 17.08     ~ 226 3
67 IC 4587 LIN 15 59 51.6141497592 +25 56 26.318529096   15.5       ~ 72 1
68 NGC 6086 LIN 16 12 35.5357829352 +29 29 05.246712168   14.8       ~ 202 1
69 NVSS J161531+272657 rG 16 15 31.3601937240 +27 26 57.334964640           ~ 45 1
70 NGC 6107 rG 16 17 20.143 +34 54 05.98   14.7       ~ 83 0
71 NGC 6137 rG 16 23 03.1194649896 +37 55 20.550626868   14.1       ~ 130 1
72 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
73 NVSS J163918+295157 Rad 16 39 18.56 +29 51 53.1           ~ 27 1
74 NVSS J163920+295050 rG 16 39 20.1166656432 +29 50 55.850999820   15.15       ~ 34 0
75 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
76 4C 32.52 Rad 17 00 24.3 +32 33 32           ~ 8 0
77 4C 30.31 rG 17 00 45.2320367856 +30 08 12.874902000   15.00 14.3     ~ 76 0
78 NVSS J173835+325558 rG 17 38 35.7693534696 +32 56 01.527914472           ~ 37 1
79 NVSS J175435+323415 rG 17 54 35.5035434400 +32 34 17.203067580   15.82       ~ 42 1
80 Z 173-14 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 688 1
81 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
82 3C 388.0 SyG 18 44 02.3840387736 +45 33 29.628672300   16.91 15.56     ~ 338 1
83 Z 201-45 rG 18 57 37.5 +38 00 31   14.9       ~ 57 1
84 Z 514-50 SyG 22 31 20.5885689288 +39 21 29.593072404   14.6       ~ 446 1
85 Z 514-80 rG 22 38 29.417 +35 19 46.84   15.0       ~ 108 1
86 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 565 4

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