Table 1
Description of the selected sample.
| Name | Fermi | RA | Dec | Obs. date | Exp. | Multifrequency notes* | z | Class |
| name | (J2000) | (J2000) | (yyyy-mm-dd) | (s) | ||||
|
|
||||||||
| Unidentified γ-ray sources | ||||||||
| WISE J040946.58-040003.5 | 2FGL J0409.8-0357 | 04:09:46.59 | -04:00:03.6 | 2013-09-25 | 1200 | N,w,U,g,u,x – SED in Takeuchi+13 | ? | BL Lac |
| WISE J090038.69+674223.3 | 2FGL J0900.9+6736 | 09:00:38.74 | +67:42:23.4 | 2013-12-28 | 3000 | V,T,W,N,87,GB,rf,w,g,u,U | ? | BL Lac |
| WISE J101544.43+555100.6 | 2FGL J1016.1+5600 | 10:15:44.42 | +55:51:00.5 | 2013-12-28 | 3600 | V,T,W,N,F,87,GB,rf,w,M,s,g | 0.677 | QSO |
| WISE J122358.06+795328.2 | 2FGL J1223.3+7954 | 12:23:58.22 | +79:53:29.0 | 2013-12-27 | 2400 | L,N,w,M,g,U | ? | BL Lac |
| WISE J200505.97+700439.5 | 2FGL J2004.6+7004 | 20:05:06.30 | +70:04:40.7 | 2013-09-26 | 3000 | N,w,M,U | ? | BL Lac |
| WISE J210805.46+365526.5 | 2FGL J2107.8+3652 | 21:08:09.76 | +36:56:17.9 | 2013-09-25 | 2700 | W,T,N,87,rf,w | ? | BL Lac |
| WISE J211020.19+381659.2 | 2FGL J2110.3+3822 | 21:10:20.21 | +38:16:58.8 | 2013-09-25 | 1800 | W,N,w,M | 0.46 | QSO |
|
|
||||||||
| Fermi active galaxies of uncertian type | ||||||||
| WISE J030943.23-074427.5 | 2FGL J0309.3-0743 | 03:09:43.24 | -07:44:27.5 | 2013-09-25 | 1200 | N,A,c,rfw,M,s,g | ? | BL Lac |
| WISE J060915.06-024754.5 | 2FGL J0609.4-0248 | 06:09:15.02 | -02:47:54.2 | 2013-09-24 | 1200 | N,w,M,U,X | ? | BL Lac |
| WISE J070858.28+224135.4 | 2FGL J0709.0+2236 | 07:08:58.29 | +22:41:35.5 | 2013-12-28 | 2400 | N,87,GB,rf,w,M,g,X | ? | BL Lac |
| WISE J081240.84+650911.1 | 2FGL J0812.6+6511 | 08:12:40.84 | +65:09:10.9 | 2013-12-27 | 2400 | L,N,87,GB,rf,w,M,g,X | ? | BL Lac |
| WISE J184450.96+570938.6 | 2FGL J1844.7+5716 | 18:44:51.19 | +57:09:40.6 | 2013-09-26 | 1800 | T,L,N,87,c,rf,w,M | ? | BL Lac |
| WISE J224753.22+441315.5 | 2FGL J2247.8+4412 | 22:47:53.21 | +44:13:15.3 | 2013-09-26 | 1200 | L,N,rf,w,M,X | ? | BL Lac |
| WISE J232445.32+080206.1 | 2FGL J2324.6+0801 | 23:24:45.31 | +08:02:05.9 | 2013-09-25 | 1800 | Pm,N,87,rf,w,M | ? | BL Lac |
| WISE J232538.11+164642.7 | 2FGL J2325.4+1650 | 23:25:38.12 | +16:46:42.7 | 2013-09-25 | 1800 | N,w,M | ? | BL Lac |
|
|
||||||||
| Fermi BL Lacs with no optical spectra | ||||||||
| WISE J212743.03+361305.7 | 2FGL J2127.8+3614 | 21:27:43.03 | +36:13:05.8 | 2013-12-28 | 2400 | V,T,W,N,87,c,rf,w,M | ? | BL Lac |
| WISE J231101.29+020505.3 | 2FGL J2310.9+0204 | 23:11:01.31 | +02:05:04.2 | 2013-09-25 | 1200 | N,w,M,U,g | ? | BL Lac |
| WISE J235205.84+174913.7 | 2FGL J2352.0+1753 | 23:52:05.88 | +17:49:14.3 | 2013-12-27 | 2400 | N,87,GB,rf,w,M,U,g,u,x – SED in Takeuchi+13 | ? | BL Lac |
| WISE J235612.70+403646.8 | 2FGL J2356.1+4034 | 23:56:12.68 | +40:36:48.5 | 2013-12-28 | 600 | L,N,w,M,U | 0.131 | BL Lac/galaxy |
|
|
||||||||
| BZB candidates in the Roma-BZCAT | ||||||||
| BZB J0103+4322 | 01:03:28.80 | +43:22:59.5 | 2013-09-26 | 1200 | ? | BL Lac | ||
| BZB J0607+4739 | 2FGL J0607.4+4739 | 06:07:23.25 | +47:39:46.9 | 2013-12-27 | 1800 | ? | BL Lac | |
| BZB J0612+4122 | 2FGL J0612.8+4122 | 06:12:51.18 | +41:22:37.4 | 2013-12-27 | 1800 | ? | BL Lac | |
| BZB J0814+6431 | 2FGL J0814.7+6429 | 08:14:39.19 | +64:31:22.0 | 2013-09-25 | 1200 | ? | BL Lac | |
| BZB J0848+6606 | 2FGL J0849.2+6606 | 08:48:54.60 | +66:06:09.3 | 2013-12-28 | 2400 | ? | BL Lac | |
| BZB J1123+7230 | 11:23:49.20 | +72:30:00.0 | 2013-12-27 | 3000 | ? | BL Lac | ||
| BZB J1143+7304 | 11:43:04.73 | +73:04:09.3 | 2013-12-27 | 1200 | 0.123 | BL Lac/galaxy | ||
| BZB J1330+7001 | 2FGL J1330.9+7001 | 13:30:25.81 | +70:01:38.7 | 2013-12-27 | 2400 | ? | BL Lac | |
| BZB J1435+5815 | 14:35:45.96 | +58:15:24.7 | 2013-12-28 | 2400 | 0.299 | BL Lac/galaxy | ||
| BZB J1836+3136 | 2FGL J1836.2+3137 | 18:36:21.24 | +31:36:26.8 | 2013-09-25 | 1800 | ? | BL Lac | |
| BZB J1903+5540 | 2FGL J1903.3+5539 | 19:03:11.61 | +55:40:38.4 | 2013-09-26 | 600 | ? | BL Lac | |
| BZB J2251+4030 | 2FGL J2251.9+4032 | 22:51:59.77 | +40:30:58.2 | 2013-09-25 | 600 | ? | BL Lac | |
| BZB J2255+2410 | 2FGL J2255.2+2408 | 22:55:15.34 | +24:10:12.4 | 2013-09-25 | 1800 | ? | BL Lac | |
| BZB J2320+4146 | 23:20:12.20 | +41:46:05.3 | 2013-12-28 | 600 | 0.152 | BL Lac | ||
|
|
||||||||
| BZBs listed in the Roma-BZCAT with uncertain z | ||||||||
| BZB J0650+2503 | 2FGL J0650.7+2505 | 06:50:46.52 | +25:03:00.3 | 2013-12-28 | 1800 | ? | BL Lac | |
| BZB J0749+2313 | 07:49:14.00 | +23:13:16.7 | 2013-12-28 | 1200 | ? | BL Lac | ||
| BZB J1230+2518 | 2FGL J1230.2+2517 | 12:30:14.09 | +25:18:07.1 | 2013-12-28 | 1800 | ? | BL Lac | |
| BZB J1411+7424 | 14:11:34.75 | +74:24:29.2 | 2013-12-28 | 1800 | ? | BL Lac | ||
| BZB J2323+4210 | 2FGL J2323.8+4212 | 23:23:52.10 | +42:10:58.7 | 2013-12-28 | 1200 | ? | BL Lac | |
| BZB J2338+2124 | 2FGL J2339.0+2125 | 23:38:56.38 | +21:24:41.4 | 2013-12-27 | 1800 | ? | BL Lac | |
Notes. Our sources are divided into four subsamples including 1) potential counterparts of UGSs; 2) sources are classified as active galaxies of uncertain type according to the 2LAC catalog; 3) BZBs classified in Ackermann et al. (2011) that had no available spectrum; 4) BL Lac candidates, both detected and not detected by Fermi, for which no optical spectroscopic information was found in the literature (Massaro et al. 2011b) or BZBs with uncertain/unknown redshift estimate.
Symbols used for the multifrequency notes are all reported in Sect. 3 together with the references of the catalogs/surveys.
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