2025MNRAS.537..730S

Query : 2025MNRAS.537..730S

2025MNRAS.537..730S - Mon. Not. R. Astron. Soc., 537, 730-738 (2025/February-3)

Detection of new gamma-ray AGN candidates using SIMEFIC III and DBSCAN in Fermi-LAT data.

SOOR M., AKHONDI F. and HEDAYATI KH H.

Abstract (from CDS):

We present the detection of new high-energy gamma-ray active galactic nucleus candidates using the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) clustering algorithm on two-dimensional gamma-ray data from Fermi Large Area Telescope. Our approach involves iterative applications of the SIeving MEthod for FInding Core (SIMEFIC III) algorithm, designed to enhance point source detection. By integrating DBSCAN at each denoising step, we track and evaluate the significance of potential sources across iterations. Our findings indicate that source significance increases to a specific threshold, beyond which further denoising may remove genuine sources. At the optimal denoising stage, we identified 18 sources not listed in the Fermi catalogue, with several of these sources potentially matching entries in the the Candidate Gamma-Ray Blazar Survey (CRATES) and Roma-BZCAT (Roma-BZCAT Multi-Frequency Catalog of Blazars) catalogues.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): methods: data analysis - gamma-rays: general

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 66

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Number of rows : 66
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 4FGL J0000.3-7355 gam 00 00 23.6 -73 55 19           ~ 5 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 US 1889 BLL 08 54 09.8887760136 +44 08 30.280418016   17.40 17.14 17   ~ 70 1
4 6C 085940+470301 Bla 09 03 03.99010563 +46 51 04.1374172   19.90 19.44 18.7   ~ 285 1
5 4C 42.28 QSO 09 04 15.62846918 +42 38 04.7653533   19.9 19.9     ~ 87 1
6 Ton 1015 BLL 09 10 37.0353299208 +33 29 24.418940568   16.19 15.71 15.9   ~ 100 2
7 ICRF J091042.1+224835 Bla 09 10 42.1337 +22 48 35.565   21.17 20.90 20.69   ~ 85 1
8 9Y-MST J0910+3901 Bla 09 10 50.2 +39 00 00           ~ 25 0
9 7C 090843.79+340139.00 BLL 09 11 47.7614248824 +33 49 16.794379596   19.39 18.89 18.6   ~ 65 1
10 6C 090857+413813 Bla 09 12 11.6174 +41 26 09.356       20.3   ~ 82 1
11 Ton 397 BLL 09 15 52.4015550384 +29 33 24.042671532   16.79 16.39 16.085   ~ 238 1
12 4C 38.28 Bla 09 16 48.90457434 +38 54 28.1463634   19.92 19.38 18.77   ~ 159 1
13 6C 091740+445437 Bla 09 20 58.45848666 +44 41 53.9850947   18.40 18.16 16.55   ~ 407 1
14 9Y-MST J0921+2335 BLL 09 21 45.358 +23 35 48.41           ~ 30 0
15 4FGL J0922.6+4454 Bz? 09 22 38.1 +44 54 47           ~ 13 0
16 6C 092018+413804 Bla 09 23 31.30498064 +41 25 27.4393351       20.01   ~ 88 1
17 7C 092054.7+282821 Bla 09 23 51.52339821 +28 15 25.0219334   19.70 19.48 19.00   ~ 112 1
18 3FGL J0925.7+3129 Bla 09 25 46.9 +31 26 49           ~ 20 0
19 4FGL J0927.2+2454 Bz? 09 27 17.0 +24 54 07           ~ 15 0
20 [VV2006] J092837.5+404845 BLL 09 28 37.4357240448 +40 48 45.359432784   18.98 18.66     ~ 35 0
21 4FGL J0930.7+3502 Bz? 09 30 43.5 +35 02 00           ~ 16 0
22 2MASS J09323935+1042352 BLL 09 32 39.3632208192 +10 42 35.178509520   19.41 18.63 17.6   ~ 31 0
23 ICRF J093406.6+392632 BLL 09 34 06.67011639 +39 26 32.1332266   20.48 20.06 19.28   ~ 65 1
24 4FGL J0936.5+1847 Bz? 09 36 32.3 +18 47 51           ~ 12 0
25 [VV2006] J094635.1+101705 Bla 09 46 35.06995887 +10 17 06.1344498   20.03 19.69 18.9   ~ 120 1
26 4FGL J0947.6+2215 Bz? 09 47 37.0 +22 15 36           ~ 15 0
27 US 1015 BLL 09 50 11.8169003520 +45 53 20.052168648   19.64 19.00     ~ 59 1
28 4FGL J0950.2+0615 Bz? 09 50 14.3 +06 15 30           ~ 13 0
29 NVSS J095249+071330 BLL 09 52 49.5769750296 +07 13 30.043757136           ~ 31 1
30 RX J0955.1+3550 BLL 09 55 07.8818398488 +35 51 00.885435048   21.04 20.36 19.1   ~ 68 0
31 6C 095304+394936 QSO 09 56 08.5587582720 +39 35 16.208555280   19.97 19.60     ~ 57 1
32 7C 095359.3+252945 Bla 09 56 49.87537985 +25 15 16.0498155   17.46 17.21 17.96   ~ 367 2
33 4FGL J0957.8+3423 Bz? 09 57 53.0 +34 23 51           ~ 17 0
34 4FGL J0958.0+3222 AG? 09 58 05.3 +32 22 08           ~ 20 0
35 RX J0959.4+2123 BLL 09 59 29.8891063800 +21 23 21.092839476           ~ 48 1
36 9C J1001+2911 BLL 10 01 10.2057148656 +29 11 37.537140264   19.00 18.34 16.39   ~ 123 1
37 1RXS J100235.8+221609 BLL 10 02 34.4165616288 +22 16 14.884159692   18.92   19.41   ~ 43 0
38 7C 100052.4+261941 BLL 10 03 42.2283532704 +26 05 12.884527932           ~ 34 1
39 RX J1006.9+3454 BLL 10 06 56.4721611528 +34 54 45.192297024   19.48 19.03 18.2   ~ 59 0
40 QSO J1008+0621 BLL 10 08 00.81616040 +06 21 21.2160257 17.61 17.17 17.85 16.73   ~ 123 1
41 4FGL J1011.6+3600 Bz? 10 11 37.2 +36 00 51           ~ 12 0
42 ATO J153.0556+06.5158 BLL 10 12 13.3484443872 +06 30 57.192683436   17.72 17.39 16.9   ~ 105 1
43 SDSS J101241.37+243923.4 Bla 10 12 41.3779909824 +24 39 23.394747816   19.77 19.58 19.4   ~ 82 1
44 RX J1012.7+4229 BLL 10 12 44.3054821248 +42 29 57.094313532   19.01 18.43     ~ 93 1
45 NVSS J101349+344550 Bla 10 13 49.61404321 +34 45 50.7834679   19.32 18.95 19.30   ~ 151 1
46 3FGL J1014.2+4115 Bla 10 14 21.8 +41 12 30           ~ 23 0
47 4FGL J1014.7+3210 Bz? 10 14 44.3 +32 10 24           ~ 10 0
48 QSO J1016+0513 Bla 10 16 03.13647602 +05 13 02.3413146   20.26 19.83 20   ~ 162 1
49 7C 1015+3557 Bla 10 18 10.98810472 +35 42 39.4409041   18.62 18.07 17.65   ~ 212 1
50 3FGL J1018.1+1904 Bz? 10 18 11.5 +19 05 47           ~ 17 0
51 [VV2006] J101827.8+053029 Bla 10 18 27.84828610 +05 30 29.9620200   19.63 19.33 20.05   ~ 112 1
52 4FGL J1019.7+0511 Bz? 10 19 46.0 +05 11 26           ~ 15 0
53 NVSS J102100+162553 BLL 10 21 00.3533388672 +16 25 54.017072220       18.4   ~ 23 0
54 4C 40.25 Bla 10 23 11.56566843 +39 48 15.3853581   17.5 17.5 17.18   ~ 182 1
55 RX J1023.6+3001 BLL 10 23 39.7366248552 +30 00 57.751171200   19.31 18.77 18.2   ~ 58 0
56 QSO J1024+2332 BLL 10 24 53.6370693744 +23 32 33.963550476   18.00 17.42 16.6   ~ 83 1
57 3FGL J1028.0+1829 BLL 10 27 40.6 +18 28 53           ~ 24 0
58 7C 102527.69+312300.00 BLL 10 28 17.6123293728 +31 07 34.239431604           ~ 24 1
59 6C 102947+375354 BLL 10 32 40.7210836656 +37 38 26.750635656   18.42 18.07 17.3   ~ 60 1
60 7C 1030+4131 Bla 10 33 03.70787172 +41 16 06.2329333   20.01 19.64 19.97   ~ 234 1
61 RX J1033.7+3708 BLL 10 33 46.3947713592 +37 08 25.141905816   20.96 20.14     ~ 32 0
62 [VV96] J103633.0+220312 BLL 10 36 32.9805521328 +22 03 12.205766268   19.25 19.15 19.01   ~ 83 1
63 4FGL J1036.5+1231 Bz? 10 36 35.5 +12 31 22           ~ 12 0
64 RX J1040.9+1342 BLL 10 40 58.3765733673 +13 41 50.635572203           ~ 29 0
65 NVSS J104939+154838 BLL 10 49 39.3568561080 +15 48 37.578031668           ~ 47 1
66 3FGL J1049.8+1425 Bla 10 49 52.2 +14 29 01           ~ 25 0

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