2013ApJS..208...25T

Query : 2013ApJS..208...25T

2013ApJS..208...25T - Astrophys. J., Suppl. Ser., 208, 25 (2013/October-0)

Multiband diagnostics of unidentified 1FGL sources with Suzaku and Swift X-ray observations.

TAKEUCHI Y., KATAOKA J., MAEDA K., TAKAHASHI Y., NAKAMORI T. and TAHARA M.

Abstract (from CDS):

We have analyzed all the archival X-ray data of 134 unidentified (unID) gamma-ray sources listed in the first Fermi/LAT (1FGL) catalog and subsequently followed up by the Swift/XRT. We constructed the spectral energy distributions (SEDs) from radio to gamma-rays for each X-ray source detected, and tried to pick up unique objects that display anomalous spectral signatures. In these analyses, we target all the 1FGL unID sources, using updated data from the second Fermi/LAT (2FGL) catalog on the Large Area Telescope (LAT) position and spectra. We found several potentially interesting objects, particularly three sources, 1FGL J0022.2-1850, 1FGL J0038.0+1236, and 1FGL J0157.0-5259, which were then more deeply observed with Suzaku as a part of an AO-7 program in 2012. We successfully detected an X-ray counterpart for each source whose X-ray spectra were well fitted by a single power-law function. The positional coincidence with a bright radio counterpart (currently identified as an active galactic nucleus, AGN) in the 2FGL error circles suggests these sources are definitely the X-ray emission from the same AGN, but their SEDs show a wide variety of behavior. In particular, the SED of 1FGL J0038.0+1236 is not easily explained by conventional emission models of blazars. The source 1FGL J0022.2-1850 may be in a transition state between a low-frequency peaked and a high-frequency peaked BL Lac object, and 1FGL J0157.0-5259 could be a rare kind of extreme blazar. We discuss the possible nature of these three sources observed with Suzaku, together with the X-ray identification results and SEDs of all 134 sources observed with the Swift/XRT.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - gamma rays: general - radiation mechanisms: general - X-rays: general

VizieR on-line data: <Available at CDS (J/ApJS/208/25): table4.dat table5.dat table6.dat>

Simbad objects: 141

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Number of rows : 141
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 SUMSS J000133-415524 BLL 00 01 32.7531509127 -41 55 25.319606670           ~ 43 0
2 NVSS J000922+503028 BLL 00 09 22.7604063473 +50 30 28.834597215           ~ 47 0
3 ATO J005.5386-18.8930 BLL 00 22 09.2686975344 -18 53 34.868121432 17.48 17.20 16.97     ~ 52 1
4 PSR J0023+0923 Psr 00 23 16.890 +09 23 24.18           ~ 137 0
5 NVSS J003119+072456 BLL 00 31 19.7096957544 +07 24 53.560153296   19.8   18.6   ~ 42 1
6 9Y-MST J0031-5521 Bla 00 32 18.7 -55 22 00           ~ 32 0
7 LEDA 1413300 BLL 00 37 50.8803675096 +12 38 19.876764084 17.59 16.83 16.22 14.7   ~ 49 1
8 3FHL J0039.2+4330 BLL 00 39 08.147 +43 30 14.64           ~ 37 0
9 PMN J0051-6242 BLL 00 51 16.6464761530 -62 42 04.408098612 17.50 17.42 17.38   16.493 ~ 59 1
10 HE 0052-2511 BLL 00 54 46.7593476432 -24 55 29.219073024 17.06 16.85 16.78     ~ 57 0
11 PSR J0101-6422 Psr 01 01 11.1163 -64 22 30.171           ~ 63 0
12 2FGL J0102.2+0943 BLL 01 02 17.1125605392 +09 44 09.591342864           ~ 35 1
13 PSR J0103+48 Psr 01 02 50.6687164 +48 39 42.769776           ~ 41 0
14 PSR J0106+4855 Psr 01 06 25.030 +48 55 52.01           ~ 51 0
15 SDSS J011540.51+035643.3 BLL 01 15 40.5116006640 +03 56 43.302378840 18.04 18.01 17.82 19.2   ~ 63 1
16 PSO J021.2103-06.4169 BLL 01 24 50.4851504351 -06 25 00.943106646       18.4   ~ 46 1
17 SUMSS J014347-584550 BLL 01 43 47.4327895920 -58 45 51.366823488         16.442 ~ 57 1
18 PMN J0156-5302 BLL 01 56 58.0038753524 -53 01 59.958409848 18.53 18.36 18.46     ~ 60 1
19 PMN J0216-6636 BLL 02 16 50.8694017295 -66 36 42.600089395 17.96 17.44 17.57     ~ 50 1
20 6dFGS gJ022314.3-111738 BLL 02 23 14.2526085528 -11 17 38.474757384   19.02   18.46   ~ 47 0
21 NVSS J022613+093726 QSO 02 26 13.7149921054 +09 37 26.753629926   18.0 18.5     ~ 52 1
22 NVSS J023927+132738 BLL 02 39 27.2338101624 +13 27 38.504055421           ~ 33 1
23 NVSS J030515-160814 BLL 03 05 15.0695002294 -16 08 16.687113582           ~ 50 1
24 PSR J0308+7442 Psr 03 07 55.8956909 +74 43 13.432617           ~ 30 1
25 SUMSS J031614-643732 BLL 03 16 14.3328133715 -64 37 31.463468178         17.216 ~ 47 1
26 1RXS J033514.5-445929 BLL 03 35 13.8824904827 -44 59 43.724139067           ~ 43 0
27 PSR J0340+41 Psr 03 40 23.2887 +41 30 45.300           ~ 91 0
28 1FGL J0345.2-2355 Bz? 03 45 18.41 -23 52 20.0           ~ 28 0
29 NVSS J040946-040003 BLL 04 09 46.5862773216 -04 00 03.554420112   18.9 17.53 18.8 16.49 ~ 47 1
30 PMN J0439-1900 BLL 04 39 49.7320560216 -19 01 01.419513816   18.5   18.7   ~ 37 1
31 RX J0506.0+6113 BLL 05 05 58.7847983400 +61 13 35.957739216           ~ 50 2
32 RX J0506.9-5435 BLL 05 06 57.8154316665 -54 35 03.822937816 17.60 17.25 17.14   15.822 ~ 62 0
33 NVSS J051547+152716 BLL 05 15 47.3535758902 +15 27 16.593670679       18.1   ~ 44 1
34 ICRF J052217.4+011331 BLL 05 22 17.46744175 +01 13 31.1853463       20   ~ 76 1
35 PSO J080.8044-25.5318 G 05 23 13.0748610986 -25 31 54.492620030           ~ 56 0
36 PSR J0533+6759 Psr 05 33 55.1422119 +67 59 17.482910           ~ 26 0
37 2FGL J0537.7-5716 BLL 05 37 48.9538387032 -57 18 30.099289860 17.85 17.77 17.34     ~ 48 0
38 2MASS J05381040-3908424 BLL 05 38 10.3641407619 -39 08 42.458641108 19.24 19.22       ~ 43 1
39 1FGL J0545.6+6022 gam 05 45 46.1 +60 16 13           ~ 25 0
40 1FGL J0600.5-2006 gam 06 00 36 -20 06.8           ~ 13 0
41 4FGL J0602.8-4019 BLL 06 02 51.2904218280 -40 18 45.335282580           ~ 44 0
42 1RXS J060409.4-481726 BLL 06 04 08.6207497217 -48 17 25.157359371 17.96 17.91 17.79     ~ 51 1
43 CLASS J060458.4179+000043.362 BLL 06 04 58.4179 +00 00 43.362           ~ 33 1
44 1RXS J060915.4-024749 BLL 06 09 15.0673808232 -02 47 54.677092676           ~ 41 0
45 PSR J0622+3749 Psr 06 22 10.411 +37 49 14.60           ~ 58 0
46 2FGL J0647.8-6102 BLL 06 47 40.85242 -60 58 05.0538 20.06 19.55       ~ 44 1
47 1FGL J0707.3+7742 BLL 07 06 51.3339102456 +77 41 36.996122563           ~ 36 0
48 2FGL J0719.2-5000 Bla 07 19 18.08 -49 56 03.0           ~ 20 0
49 PMN J0803-0336 BLL 08 03 12.0784588526 -03 36 00.582280973           ~ 46 1
50 ATO J123.5487-10.2028 BLL 08 14 11.6936593656 -10 12 10.286072352 17.20 16.91 17.03 16.6   ~ 43 0
51 9Y-MST J0843+6713 BLL 08 43 23.5 +67 12 58           ~ 23 0
52 SDSS J084839.66+050617.8 Bz? 08 48 39.66265 +05 06 17.8982           ~ 21 0
53 ATO J135.6121+20.8462 BLL 09 02 26.9116467072 +20 50 46.396146264 16.91 16.74 16.69 17.4   ~ 60 1
54 NAME CRATES-VA J0906-0905 BLL 09 06 18.0549950471 -09 05 44.920448369 17.90 17.85 17.37     ~ 49 1
55 1RXS J090858.0-211902 Bla 09 08 58.6571046319 -21 18 54.690393737           ~ 11 0
56 9Y-MST J0921+2335 BLL 09 21 45.358 +23 35 48.41           ~ 30 0
57 2MASX J09432407-7620101 Bz? 09 43 24.02882 -76 20 10.3613   19       ~ 57 1
58 1FGL J0953.6-1505 gam 09 53 37.3 -15 09 18           ~ 23 0
59 CRTS J095527.8-394752 CV* 09 55 27.8212296096 -39 47 52.391744160     18.45     ~ 41 0
60 87GB 103758.5+063247 BLL 10 40 31.6262333280 +06 17 21.764932476   20.02 16.8 19.73   ~ 81 1
61 PSR J1048+2339 Psr 10 48 43.4339582160 +23 39 53.577436140     19.47     ~ 82 0
62 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
63 1FGL J1119.9-2205 gam 11 20.0 -22 04           ~ 36 0
64 PSR J1124-36 Psr 11 24 01.1169434 -36 53 19.108887           ~ 63 0
65 SDSS J112903.24+375656.7 BLL 11 29 03.2509775616 +37 56 56.742130896           ~ 35 0
66 1RXS J114142.2-140757 BLL 11 41 41.8080282552 -14 07 54.754153248           ~ 44 1
67 9Y-MST J1200+0202 BLL 12 00 12.346 +02 02 08.41           ~ 29 0
68 QSO B1216-010 BLL 12 18 34.9299611304 -01 19 54.342898428 18.43 18.30 18.01 18.2   ~ 119 1
69 PSR J1221-0633 Psr 12 21 24.76 -06 33 51.7           ~ 40 0
70 1FGL J1226.0+2954 gam 12 26 05 +29 53.8           ~ 24 0
71 PSR J1231-1411 Psr 12 31 11.3069 -14 11 43.628           ~ 139 0
72 PSR J1231-5113 Psr 12 31 35.6542969 -51 13 35.364075           ~ 29 0
73 NVSS J124919-280833 BLL 12 49 19.31040 -28 08 34.3860           ~ 40 1
74 RX J1251.2+1039 BLL 12 51 17.8838033784 +10 39 07.307958780 18.32 18.14 17.73     ~ 53 1
75 7C 1252+2227 BLL 12 54 33.2739157176 +22 11 03.647269968   18.0   17.7   ~ 44 1
76 [B68b] 142 BLL 12 57 16.5833312232 +36 47 14.916374592   18.34 17.84 16.6   ~ 71 1
77 PSR J1301+0833 Psr 13 01 38.26 +08 33 57.5           ~ 56 0
78 PSR J1302-32 Psr 13 02 25.5358887 -32 58 36.833496           ~ 35 0
79 1RXS J130421.2-435308 BLL 13 04 21.0058097184 -43 53 10.199729472 16.09 15.84 15.71     ~ 72 1
80 MCG-07-27-032 Sy1 13 06 26.1214861728 -40 24 52.595604396   13.58 13.42 12.01   ~ 269 0
81 PMN J1307-4259 BLL 13 07 37.9837746648 -42 59 38.986887192 16.39 16.10 15.92 15.80 14.59 ~ 68 1
82 PSR J1311-3430 Psr 13 11 45.7292612136 -34 30 30.294149760   21.0   18.8   ~ 181 1
83 PSR J1312+00 Psr 13 12 46.6406250 +00 51 00.071969           ~ 41 0
84 1FGL J1312.7+0051 gam 13 12 58.3 +00 50 05           ~ 1 0
85 NVSS J131552-073301 BLL 13 15 52.9742406408 -07 33 02.073662064   18.8   17.8 17.78 ~ 43 1
86 QSO B1313-333 Bla 13 16 07.98594757 -33 38 59.1726741   18.04 20.0 17.23   ~ 267 1
87 PMN J1328-4728 BLL 13 28 40.6236883896 -47 27 49.456920852           ~ 53 1
88 NVSS J134042-041006 BLL 13 40 42.0173568000 -04 10 07.046694084           ~ 46 1
89 NVSS J140609-250808 BLL 14 06 09.6096123648 -25 08 09.373534872           ~ 39 0
90 RX J1419.0+7732 BLL 14 19 00.3556447992 +77 32 29.346440708           ~ 49 1
91 NVSS J151148-051345 BLL 15 11 48.5608046106 -05 13 46.988172935         18.327 ~ 44 1
92 1RXS J152049.3-034845 BLL 15 20 48.9055251623 -03 48 51.669744514       18.1 16.194 ~ 45 1
93 2FGL J1539.2-3325 Bz? 15 39 11.58 -33 22 05.6           ~ 26 0
94 1FGL J1544.5-1127 Psr 15 44 14.33 -11 24 42.0           ~ 70 0
95 NVSS J154952-065907 BLL 15 49 52.0440165168 -06 59 07.919771748   19.8   18.5 18.021 ~ 39 0
96 PSR J1625-0021 Psr 16 25 10.469 -00 21 26.73           ~ 35 0
97 1FGL J1627.6+3218 gam 16 28 00.40656 +32 24 14.0328           ~ 35 0
98 PSR J1630+3734 Psr 16 30 36.4672852 +37 34 42.101440           ~ 48 0
99 PSR J1653-0158 Psr 16 53 38.0717183664 -01 58 36.843092004   20.4   19.4   ~ 102 0
100 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
101 1FGL J1721.1+0713 gam 17 20 39.3 +07 08 49           ~ 19 0
102 6C 175708+871924 Bla 17 37 25.4723845416 +87 17 43.192282956   19.3   17.6   ~ 37 1
103 1FGL J1738.9+8716 gam 17 41 43.1 +87 14 41           ~ 1 0
104 PSR J1744-7619 Psr 17 44 00.993 -76 19 13.95           ~ 36 0
105 1FGL J1744.1+7620 gam 17 45 08.5 -76 10 38           ~ 1 0
106 PSR J1745+1017 Psr 17 45 33.8371 +10 17 52.523           ~ 70 0
107 AT20G J175338-501515 BLL 17 53 38.5343844240 -50 15 14.454686916           ~ 42 1
108 PSR J1805+0615 Psr 18 05 42.3999024 +06 15 18.359184           ~ 33 0
109 PSR J1810+17 Psr 18 10 37.2791131488 +17 44 37.425884136           ~ 147 1
110 PSR J1816+4510 Psr 18 16 35.9342957160 +45 10 33.917516328           ~ 126 0
111 1FGL J1824.6+1013 gam 18 24 42 +10 13.1           ~ 10 0
112 RX J1841.7+3218 BLL 18 41 47.0421791016 +32 18 39.144474684           ~ 54 0
113 1RXS J184230.6-584202 BLL 18 42 29.8182908406 -58 41 57.947264504         17.709 ~ 39 0
114 PSR J1858-2216 Psr 18 58 04.42 -22 19 13.7           ~ 39 0
115 PSR J1902-5105 Psr 19 02 02.8476 -51 05 56.969           ~ 64 0
116 2FGL J1917.0-3027 BLL 19 16 53.7 -30 25 29           ~ 21 0
117 87GB 192614.4+614823 BLL 19 26 49.8911645880 +61 54 42.345978048           ~ 54 1
118 1FGL J1956.2-0238 gam 19 56 12 -02 38.6           ~ 8 0
119 1RXS J195945.8-472531 BLL 19 59 45.6659618232 -47 25 19.352198028 17.13 16.94 16.92     ~ 48 0
120 NVSS J200506+700440 BLL 20 05 06.0139547561 +70 04 39.353183462           ~ 42 1
121 1RXS J201431.2+064842 BLL 20 14 31.0874432885 +06 48 52.311655421           ~ 41 0
122 SUMSS J203451-420024 BLL 20 34 51.0909972120 -42 00 38.437476084           ~ 43 1
123 PSR J2039-5617 Psr 20 39 34.9609502672 -56 17 09.033104197           ~ 84 0
124 PSR J2043+1711 Psr 20 43 20.8828 +17 11 28.941           ~ 129 1
125 1FGL J2112.5-3044 gam 21 12 33.6 -30 43 45           ~ 30 0
126 PSR J2129-04 Psr 21 29 45.0469239408 -04 29 06.973600236     16.68     ~ 100 0
127 2FGL J2134.6-2130 BLL 21 34 30.1792251168 -21 30 32.798177496           ~ 37 0
128 SDSS J222329.57+010226.6 BLL 22 23 29.5712726232 +01 02 26.654394588           ~ 46 0
129 9Y-MST J2229-1633 Bla 22 28 30.1973748899 -16 36 43.180180795           ~ 31 1
130 ICRF J224412.7+405713 BLL 22 44 12.7311667056 +40 57 13.619816316       19.7   ~ 110 1
131 9Y-MST J2251-4928 BLL 22 51 28.6971348168 -49 29 11.135695488           ~ 36 1
132 PSR J2256-1024 Psr 22 56 56.390 -10 24 34.37           ~ 88 0
133 NVSS J225815-364433 BLL 22 58 15.0152441614 -36 44 34.384367511           ~ 39 0
134 9Y-MST J2258-8245 BLL 22 59 49.78 -82 52 06.9           ~ 33 1
135 1RXS J230940.6-363241 BLL 23 09 40.8459634525 -36 32 48.832723791           ~ 39 1
136 1RXS J232256.7-491658 BLL 23 22 54.4278625059 -49 16 30.398778875           ~ 42 1
137 QSO B2326-477 Bla 23 29 17.7043623168 -47 30 19.113949332   16.93 16.79 16.30   ~ 208 1
138 PSR J2339-0533 Psr 23 39 38.7412778376 -05 33 05.108592528     18.48     ~ 149 0
139 ICRF J234639.9+070506 BLL 23 46 39.9335867472 +07 05 06.855326664   17.0 16.5     ~ 69 1
140 [VV2006] J235021.5-300039 QSO 23 50 21.5357894856 -30 00 38.856405492   19.20       ~ 42 0
141 87GB 234934.7+173227 BLL 23 52 05.8374165936 +17 49 13.745647704 19.37 18.83 18.80 17.8   ~ 45 1

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