2017MNRAS.468.4902P

Query : 2017MNRAS.468.4902P

2017MNRAS.468.4902P - Mon. Not. R. Astron. Soc., 468, 4902-4937 (2017/July-2)

A new method to unveil blazars among multiwavelength counterparts of unassociated Fermi γ-ray sources.

PAIANO S., FRANCESCHINI A. and STAMERRA A.

Abstract (from CDS):

We discuss a new method for unveiling the possible blazar active galactic nucleus nature among the numerous populations of unassociated gamma-ray sources (UGSs) in the Fermi catalogues. Our tool relies on the positional correspondence of the Fermi object with X-ray sources (mostly from Swift-XRT), correlated with other radio, infrared and optical data in the field. We built a set of spectral energy distribution templates representative of the various blazar classes, and we quantitatively compared them to the observed multiwavelength flux density data for all Swift-XRT sources found within the Fermi error box, by taking advantage of some well-recognized regularities in the broad-band spectral properties of the objects. We tested the procedure by comparison with a few well-known blazars, and tested the chance for false-positive recognition of UGSs against known pulsars and other Galactic and extragalactic sources. Based on our spectral recognition tool, we find the blazar candidate counterparts for 14 2FGL UGSs among 183 selected at high galactic latitudes. Furthermore, our tool also allows us to obtain rough estimates of the redshift for the candidate blazar. In a few cases in which this has been possible (i.e. when the counterpart was an SDSS object), we verified that our estimate is consistent with the measured redshift. The estimated redshifts of the proposed UGS counterparts are larger, on average, than those of known Fermiblazars, a fact that might explain the lack of previous association or identification in published catalogues.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - gamma-rays: galaxies - BL Lacertae objects: general - BL Lacertae objects: general

Simbad objects: 113

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Number of rows : 113
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 QSO J0017-0512 QSO 00 17 35.8173230832 -05 12 41.768611560       17.60   ~ 110 0
2 2FGL J0102.2+0943 BLL 01 02 17.1125605392 +09 44 09.591342864           ~ 32 0
3 WISEA J011619.62-615343.4 BLL 01 16 19.61241 -61 53 43.5148           ~ 37 0
4 WISEA J014347.41-584551.4 BLL 01 43 47.4327895920 -58 45 51.366823488           ~ 51 0
5 QSO B0229+200 BLL 02 32 48.6148874688 +20 17 17.486717388   18.0 18.00 13.96   ~ 339 1
6 WISEA J023734.04-360328.4 BLL 02 37 34.0464247200 -36 03 28.455320844 17.99 17.65 17.63 16.3   ~ 62 0
7 4C 28.07 QSO 02 37 52.40567519 +28 48 08.9899986     19.30 16.99   ~ 613 1
8 RBS 337 BLL 02 38 32.4803496720 -31 16 58.063079280 16.86 16.81 16.46 16.00   ~ 73 0
9 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1546 2
10 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 853 2
11 NGC 1218 Sy1 03 08 26.22380005 +04 06 39.3007808   12.84       ~ 382 1
12 IC 310 rG 03 16 42.9787569912 +41 19 29.615579544   14.3       ~ 281 2
13 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4008 3
14 6C 032130+340016 BLL 03 24 41.1612813408 +34 10 45.857918460     15.72 13.1   ~ 274 1
15 QSO B0323+022 BLL 03 26 13.9481827296 +02 25 14.675937708   17.05 16.55 15.3   ~ 243 1
16 4C 39.12 rG 03 34 18.4162545072 +39 21 24.413823900   14.2       ~ 104 1
17 3FGL J0334.2+3915 BL? 03 34 19.8 +39 20 20           ~ 15 0
18 RX J0338.4+1302 BLL 03 38 29.2787338512 +13 02 15.445163688   19.3   18.3   ~ 40 0
19 QSO B0347-121 BLL 03 49 23.1862105584 -11 59 27.366035532   18.74 18.2 17.46   ~ 230 0
20 QSO J0403-3605 Bla 04 03 53.74990003 -36 05 01.9131880   17.04 17.17 16.67   ~ 285 1
21 QSO B0403-132A BLL 04 05 34.00339116 -13 08 13.6909309   17.37 17.09 16.6   ~ 358 1
22 QSO B0414+009 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 287 0
23 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 951 1
24 ICRF J042210.7-064345 QSO 04 22 10.7953112760 -06 43 45.330888216       16.9   ~ 64 0
25 QSO B0420-0127 QSO 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1207 3
26 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 906 0
27 QSO J0457-2324 QSO 04 57 03.1791422424 -23 24 52.021129572   18.85 18.5 16.56   ~ 396 1
28 NAME Pic A Sy1 05 19 49.7229323856 -45 46 43.852662732   15.73 15.77 14.85   ~ 666 1
29 M 1 SNR 05 34 30.9 +22 00 53           ~ 6193 1
30 PSR J0614-3329 Psr 06 14 10.3479 -33 29 54.116           ~ 100 1
31 QSO B0625-354 BLL 06 27 06.7286533392 -35 29 15.363665088   14.93       ~ 188 1
32 NAME Geminga Psr 06 33 54.153 +17 46 12.91           ~ 1222 0
33 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 268 1
34 3FGL J0758.7+3747 BL? 07 58 45.4 +37 46 39           ~ 12 0
35 7C 080602.89+522749.00 BLL 08 09 49.1868285744 +52 18 58.249938744   16.11 15.59 14.6   ~ 278 2
36 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2316 1
37 ICRF J084047.5+131223 Sy1 08 40 47.58842599 +13 12 23.5637506   18.58 18.15 17.622   ~ 434 1
38 2MASS J08471293+1133501 BLL 08 47 12.9303893448 +11 33 50.153057640     16.90 16.6   ~ 106 0
39 ICRF J084957.9+510829 Sy1 08 49 57.97685916 +51 08 29.0238146   19.37 18.78 17.79   ~ 249 2
40 QSO J0854+2006 BLL 08 54 48.8749846272 +20 06 30.639583620   15.91 15.43 15.56   ~ 2331 1
41 6C 094211+581115 BLL 09 45 42.2361310488 +57 57 47.697286104   19.37 18.04 15.4   ~ 79 1
42 ICRF J094857.3+002225 Sy1 09 48 57.32005819 +00 22 25.5596984   18.85 18.61 18.17   ~ 318 2
43 ICRF J095738.1+552257 Sy1 09 57 38.1839604096 +55 22 57.754950636   18.24 17.89     ~ 434 1
44 ICRF J100646.4-215920 Sy1 10 06 46.4138565672 -21 59 20.411032848   17.05 16.89 16.29   ~ 94 1
45 ATO J153.0556+06.5158 Sy1 10 12 13.3484443872 +06 30 57.192683436   17.72 17.39 16.9   ~ 92 1
46 6C 101157+494057 BLL 10 15 04.1396533776 +49 26 00.706055496   16.56 16.15 14.58   ~ 370 3
47 1FGL J1018.6-5856 HXB 10 18 55.5875706288 -58 56 45.975246900   13.638 12.683     O6V((f)) 134 0
48 PSR J1025-07 Psr 10 24 38.6991893112 -07 19 19.045523388     19.81 18.78 18.00 ~ 241 1
49 ICRF J103351.4+605107 Sy1 10 33 51.4290959304 +60 51 07.334442756   19.31 18.86 20.24   ~ 166 2
50 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2440 0
51 ICRF J105837.7+562811 Sy1 10 58 37.7276569824 +56 28 11.207405028   16.80 16.31 14.58   ~ 209 2
52 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2675 1
53 87GB 111429.0+203022 BLL 11 17 06.2512673640 +20 14 07.380923028     15.20     ~ 138 1
54 SDSS J112903.24+375656.7 BLL 11 29 03.2509775616 +37 56 56.742130896           ~ 29 0
55 6C 113337+702604 BLL 11 36 26.4090783600 +70 09 27.309071232   15.16 14.49 10.51   ~ 368 1
56 LEDA 2703015 BLL 11 36 30.0868711488 +67 37 04.345988232   18.19 17.45 15.3   ~ 143 1
57 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 601 3
58 LB 2136 Sy1 11 53 24.46663994 +49 31 08.8301372   17.94 17.66     ~ 499 1
59 ICRF J120303.5+603119 Sy2 12 03 03.5072095320 +60 31 19.163050032   16.82 16.04     ~ 134 1
60 6C 121520+302351 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   ~ 478 1
61 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 874 1
62 ICRF J122454.4+212246 Sy1 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 704 2
63 XSS J12270-4859 Psr 12 27 58.7476831464 -48 53 42.824592960           ~ 270 0
64 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7196 3
65 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3045 2
66 NAME Cen A Core PoG 13 25 27.6039817176 -43 01 09.493008456           ~ 36 0
67 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4486 3
68 NAME Cen B QSO 13 46 49.04248361 -60 24 29.3553900         15.74 ~ 153 0
69 4FGL J1410.7+7405 Sy1 14 10 45.9501293016 +74 05 10.904898048   19.9   19.2   ~ 31 0
70 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1217 2
71 3FGL J1413.2-6518 BL? 14 13 10.7 -65 19 56           ~ 11 0
72 7C 1424+2401 BLL 14 27 00.3917926224 +23 48 00.037510776 14.52 14.34 14.95 14.5   ~ 366 1
73 PG 1437+398 BLL 14 39 17.4789214824 +39 32 42.807064020   17.36 17.10 16.5   ~ 116 1
74 ICRF J144302.7+520137 Sy1 14 43 02.76069031 +52 01 37.2985156   18.96 18.29     ~ 300 3
75 2FGL J1502.1+5548 Bla 15 02 29.0 +55 52 05           ~ 30 1
76 QSO B1502+1041 Bla 15 04 24.97978391 +10 29 39.1985309   18.97 18.56 18.94   ~ 574 1
77 ICRF J150506.4+032630 Sy1 15 05 06.47716039 +03 26 30.8125704   19.02 18.62 17.72   ~ 253 1
78 2FGL J1511.8-0513 BLL 15 11 48.6 -05 13 47           ~ 38 0
79 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1316 1
80 QSO B1514-24 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 770 3
81 1FGL J1544.5-1127 Psr 15 44 14.33 -11 24 42.0           ~ 54 0
82 DENIS J154439.3-112804 Bz? 15 44 39.3673762080 -11 28 04.679240124   19.25   18.54 17.93 ~ 2 0
83 1RXS J154439.4-112820 X 15 44 39.4 -11 28 20           ~ 26 0
84 QSO B1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 568 1
85 PSR J1614-2230 Psr 16 14 36.5070 -22 30 31.207           ~ 393 1
86 2FGL J1614.8+4703 AGN 16 15 04.9 +47 03 58           ~ 33 0
87 6C 161416+471901 BLL 16 15 41.2171778784 +47 11 11.765132412   18.77 17.98     ~ 39 1
88 NGC 6251 Sy2 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 727 0
89 4C 38.41 QSO 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 858 1
90 ICRF J163813.4+572023 Sy1 16 38 13.45629995 +57 20 23.9789828     16.90 16.94   ~ 359 1
91 NAME Her B Sy1 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1725 2
92 7C 165211.80+395026.00 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2162 2
93 6C 165609+601648 QSO 16 56 48.24496246 +60 12 16.4345142     19.00     ~ 69 1
94 2FGL J1704.3+1235 BLL 17 04 09.5806742568 +12 34 21.510015888           ~ 37 0
95 QSO B1714-373 BL? 17 18 10.160 -37 18 53.80           ~ 187 0
96 3C 371 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 857 2
97 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 572 2
98 ICRF J182931.7+484446 Sy1 18 29 31.7809732968 +48 44 46.160168892   17.05 16.81 16.860   ~ 688 1
99 ICRF J200755.1-443444 Sy1 20 07 55.1842447944 -44 34 44.274118260   19.3 19.3 18   ~ 172 1
100 QSO B2005-489 BLL 20 09 25.3903899240 -48 49 53.725051056   15.75 12.81 11.41   ~ 576 2
101 EM* AS 453 Sy* 21 02 09.8189024184 +45 46 32.733603228   16.04 14.68 11.38   Mep 310 0
102 SDSS J211522.00+121802.8 BLL 21 15 21.9991464024 +12 18 02.807891784           ~ 33 0
103 PSR J2124-3358 Psr 21 24 43.8464 -33 58 44.961           ~ 299 1
104 QSO B2144+093 QSO 21 47 10.16296704 +09 29 46.6722487   18.72 18.54 16.51   ~ 206 1
105 QSO J2147-7536 QSO 21 47 12.73063669 -75 36 13.2249063   17.79 17.30     ~ 147 1
106 QSO B2227-0848 Bla 22 29 40.08433313 -08 32 54.4355294   17.80 17.41 17.81   ~ 360 1
107 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1119 2
108 SDSS J224604.99+154435.3 BLL 22 46 04.9940968404 +15 44 35.400334745           ~ 47 0
109 BWE 2249+1832 QSO 22 51 34.7277468096 +18 48 40.087264428   18.52 18.4     ~ 226 2
110 3C 461 BL? 23 23 24.000 +58 48 54.00     14.30     ~ 2792 1
111 PSR J2339-0533 Psr 23 39 38.7412778376 -05 33 05.108592528     18.48     ~ 118 0
112 ICRF J234639.9+070506 Sy1 23 46 39.9335867472 +07 05 06.855326664   17.0 16.5     ~ 60 1
113 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 462 0

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