Table 3: List of the 76 known AGN brighter than $O_{\rm USNO}=16.5$ , located within 35 $\hbox {$^{\prime \prime }$ }$ of a ROSAT-FSC source. Column 1: right ascension, Col. 2: declination, Col. 3: separation between the ROSAT and USNO positions in arcsec, Col. 4: X-ray count rate (count s^-1), Col. 5: magnitude $O_{\rm USNO}$ , Col. 6: magnitude $O_{\rm APS}$ , Col. 7: APS O-E colour, Col. 8: redshift, Col. 9: absolute magnitude computed by using the $O_{\rm USNO}$ magnitude ( $H_{\rm o}=50$ km s^-1 Mpc^-1), Col. 10: classification, Col. 11: name.
J2000 USNO position

h m s $^{\circ}$ ' '' '' c/r $O_{\rm US}$ $O_{\rm APS}$ O-E z $M_{\rm abs}$ Name

0
6 23.08 12 35 53.2 20.8 0.030 15.8 16.26 0.36 0.98 -28.4 Q RGB J0006+125

0 24 44.10 0 32 21.4 9.7 0.047 16.2 16.92 0.58 0.404 -25.8 Q PB 5932

0 36 12.50 5 49 52.0 9.1 0.064 16.3 16.88 0.28 0.41 -25.7 Q HS 0033+0533

0 52 5.57 0 35 38.4 28.6 0.024 16.3 16.80 1.04 0.399 -25.7 Q Q 0049+0019A

0 57 9.93 14 46 10.4 26.7 0.246 15.9 16.11 1.12 0.171 -24.0 Q PHL 909

1 20 17.29 21 33 46.6 25.0 0.023 15.5 15.80 0.54 1.500 -29.7 Q PG 0117+213

1 39 55.80 6 19 22.5 8.4 0.031 15.7 16.55 0.60 0.396 -26.5 Q PHL 1092

1 40 35.02 23 44 51.1 25.1 0.029 16.1 16.64 0.98 0.32 -25.4 Q HS 0137+2329

1 41 59.60 6 12 5.5 2.7 0.049 16.3 16.27 0.56 0.345 -27.2 Q PHL 1106

3 18 25.57 15 59 56.7 11.2 0.033 16.3 16.58 0.02 0.515 -25.9 Q US 3828

3 39 9.60 3 45 52.5 23.7 0.038 16.4 17.55 0.44 0.199 -24.0 Q RXS J03391+0346

4 24 46.85 0 36 6.4 7.4 0.052 16.1 16.75 1.26 BL PKS 0422+00

8 15 59.21 41 44 57.1 17.9 0.021 15.8 15.97 0.32 1.28 -29.3 Q KUV 08126+4154

8 22 36.88 54 18 36.4 33.7 0.042 16.3 16.65 1.12 0.086 -22.3 S1 SBS 0818+544

8 43 49.78 26 19 11.1 19.4 0.068 16.4 17.23 0.20 0.258 -24.7 Q HS 0840+2630

8 59 24.35 46 37 17.3 22.3 0.047 16.5 16.89 0.74 0.923 -27.5 Q US 2068

9 0 47.30 74 44 26.3 16.6 0.045 16.1 0.77 -27.4 Q HS 0855+7456

9 19 57.63 51 6 9.1 17.1 0.039 15.8 16.35 -0.80 0.553 -27.0 Q SBS 0916+513

9 25 14.35 54 44 27.2 10.4 0.048 15.9 16.66 -0.12 0.476 -26.3 Q SBS 0921+549

9 29 9.82 46 44 24.1 15.9 0.025 15.6 15.66 0.18 0.240 -25.3 Q US 645

9 36 25.45 39 49 33.7 24.8 0.033 16.1 16.81 0.82 1.25 -28.7 Q KUV 09333+4003

9 37 1.93 34 25 0.0 12.7 0.031 16.0 16.55 0.22 0.908 -28.1 Q Ton 1078

9 41 33.72 59 48 11.3 13.2 0.045 16.3 16.70 0.36 0.966 -27.9 Q SBS 0938+600

9 56 49.89 25 15 16.0 8.0 0.048 16.2 16.92 0.84 0.712 -27.2 Q OK 290

10 4 20.10 5 13 0.6 22.1 0.021 16.2 16.55 0.26 0.161 -23.8 Q PG 1001+054

10 13 30.20 53 15 59.6 6.7 0.025 16.2 16.64 0.36 1.495 -29.1 Q SBS 1010+535

10 15 57.04 1 9 13.7 16.1 0.082 16.3 16.97 0.94 0.779 -27.2 Q Q 1013+0124

10 33 59.50 35 55 9.0 14.9 0.046 16.3 16.76 0.92 0.169 -23.8 Q CSO 275

10 43 55.52 56 27 57.0 18.6 0.028 16.3 16.81 -0.40 1.951 -29.6 Q SBS 1040+567

11 17 6.41 44 13 33.8 8.1 0.023 14.8 15.06 0.40 0.144 -24.9 Q PG 1114+445

11 30 4.76 41 16 19.5 23.2 0.035 15.7 16.20 0.10 1.530 -29.5 Q KUV 11274+4133

11 33 35.40 9 39 1.8 24.6 0.029 16.4 17.05 0.06 0.379 -25.5 Q RX J11335+0939

11 43 47.71 11 28 48.1 20.6 0.046 15.5 16.38 0.80 0.118 -23.8 Q RX J11437+1128

11 52 51.90 33 7 18.8 2.7 0.033 16.1 16.30 0.40 1.389 -28.8 Q CSO 373

11 55 7.62 52 1 29.4 6.4 0.036 16.4 16.46 1.08 0.156 -23.5 Q SBS 1152+523

11 59 6.78 53 6 43.5 6.1 0.043 16.5 17.19 0.36 0.482 -25.9 Q MS 11565+5323

12 7 4.53 38 40 24.6 3.7 0.045 16.3 16.64 0.00 0.572 -26.4 Q RXS J12070+3840

12 17 40.83 49 31 17.9 1.1 0.049 16.5 17.62 0.18 0.730 -26.6 Q SBS 1215+497

12 22 10.01 27 19 2.3 6.4 0.046 15.9 16.90 0.52 0.442 -26.3 Q RXS J12221+2719

12 23 0.23 55 40 0.3 9.4 0.057 16.5 17.48 0.48 0.905 -27.5 Q SBS 1220+559

12 28 24.97 31 28 37.7 24.8 0.024 15.6 16.28 0.28 2.219 -30.4 Q B2 1225+31

12 30 50.04 1 15 22.6 6.4 0.041 14.4 14.81 0.16 0.117 -24.8 Q RX J12308+0115

12 33 26.05 45 12 23.1 11.2 0.032 16.5 16.91 -0.24 1.958 -29.4 Q HS 1231+4528

12 44 10.82 17 21 4.5 16.3 0.027 15.7 16.58 0.74 1.283 -28.8 Q PG 1241+176

13 6 5.72 80 8 20.5 10.9 0.035 16.3 18.35 1.01 1.183 -28.3 Q S5 1305+80

13 13 21.39 78 21 53.9 11.9 0.026 15.6 15.86 0.22 2.00 -30.3 Q HS 1312+7837

13 19 56.24 27 28 8.4 23.4 0.031 15.5 16.54 0.22 1.014 -28.7 Q CSO 873

13 41 0.81 41 23 14.2 17.0 0.022 16.4 16.36 -0.02 1.204 -28.3 Q PG 1338+416

13 47 19.40 59 2 32.5 10.3 0.025 16.2 16.48 0.22 0.768 -27.3 Q SBS 1345+592

13 47 37.45 30 12 52.4 20.5 0.035 15.7 16.12 0.68 0.118 -23.6 Q Q J1347+3012

13 51 28.30 1 3 38.5 17.5 0.040 16.5 17.35 0.58 1.086 -27.9 Q Q 1348+0118

14 2 44.52 15 59 56.2 1.9 0.031 16.3 16.66 1.56 0.245 -24.5 BL MC 1400+162

14 27 35.60 26 32 14.5 26.8 0.040 15.4 15.18 -0.72 0.366 -26.6 Q PG 1425+267

14 36 45.79 63 36 37.6 32.1 0.038 15.7 16.61 -0.22 2.066 -30.4 Q S4 1435+63

14 50 26.68 58 39 44.7 9.9 0.046 15.8 16.13 1.14 0.210 -23.8 Q Mark 830

14 51 53.63 72 14 46.8 5.8 0.027 16.3 16.96 0.16 0.75 -27.1 Q HS 1451+7227

15 27 28.64 65 48 10.3 14.0 0.046 16.2 16.77 0.56 0.345 -25.5 Q FBS 1526+659

15 50 43.65 11 20 47.4 23.7 0.040 16.3 16.33 0.14 0.436 -25.9 Q MC 1548+114

15 51 58.16 58 6 44.7 4.5 0.036 16.2 16.74 1.14 1.320 -28.7 Q SBS 1550+582

16 19 40.54 25 43 23.3 13.1 0.035 16.4 16.62 1.36 0.268 -24.7 Q RX J16196+2543

16 23 19.93 41 17 2.7 26.3 0.030 16.5 16.88 0.32 1.618 -28.9 Q KUV 16217+4124

16 26 37.28 58 9 17.2 6.0 0.044 16.2 16.52 0.83 0.751 -27.2 Q SBS 1625+582

16 28 25.70 8 33 0.1 10.1 0.031 16.4 17.22 0.32 0.44 -25.8 Q HS 1626+0839

16 31 43.83 52 53 43.8 5.7 0.048 16.5 16.81 0.44 0.352 -25.2 Q SBS 1630+530

16 32 1.11 37 37 50.0 14.5 0.034 16.0 16.60 0.54 1.478 -29.4 Q PG 1630+377

16 32 34.68 73 59 43.0 3.2 0.030 16.1 17.97 1.30 0.208 -24.4 Q RXS J16325+7359

16 34 29.01 70 31 32.3 1.2 0.049 14.9 15.26 1.03 1.337 -30.1 Q PG 1634+706

16 37 7.53 41 40 26.9 17.0 0.028 16.2 16.28 1.60 0.765 -27.3 Q KUV 16355+4146

17 1 0.62 64 12 9.3 19.0 0.035 15.9 16.03 0.18 2.736 -31.2 Q HS 1700+6416

17 4 41.39 60 44 30.5 8.4 0.042 15.6 15.86 0.76 0.371 -26.3 Q 3C 351.0

17 6 48.06 32 14 22.9 17.0 0.029 16.2 16.94 0.66 1.070 -28.2 Q RGB J1706+322

17 19 34.18 25 10 58.6 16.9 0.039 16.4 16.87 1.34 0.579 -26.4 Q RX J17195+2510

22 53 7.37 19 42 34.7 21.5 0.039 16.4 16.75 0.92 0.284 -24.9 Q HS 2250+1926

23 7 45.62 19 1 20.8 11.6 0.033 16.4 17.13 0.98 0.313 -25.0 Q PKS 2305+18

23 11 59.50 9 26 1.4 7.4 0.048 16.3 17.51 0.16 0.479 -26.1 Q RX J23119+0925

23 50 10.07 8 12 55.3 16.6 0.025 16.4 18.19 1.00 1.70 -29.1 Q HS 2347+0756

**Table 3:** List of the 76 known AGN brighter than $O_{\rm USNO}=16.5$ , located within 35 $\hbox {$^{\prime \prime }$ }$ of a ROSAT-FSC source. Column 1: right ascension, Col. 2: declination, Col. 3: separation between the ROSAT and USNO positions in arcsec, Col. 4: X-ray count rate (count s^-1), Col. 5: magnitude $O_{\rm USNO}$ , Col. 6: magnitude $O_{\rm APS}$ , Col. 7: APS O-E colour, Col. 8: redshift, Col. 9: absolute magnitude computed by using the $O_{\rm USNO}$ magnitude ( $H_{\rm o}=50$ km s^-1 Mpc^-1), Col. 10: classification, Col. 11: name.
J2000 USNO position
h	m	s	$^{\circ}$	'	''	''	c/r	$O_{\rm US}$	$O_{\rm APS}$	O-E	z	$M_{\rm abs}$		Name
0	6	23.08	12	35	53.2	20.8	0.030	15.8	16.26	0.36	0.98	-28.4	Q	RGB J0006+125
0	24	44.10	0	32	21.4	9.7	0.047	16.2	16.92	0.58	0.404	-25.8	Q	PB 5932
0	36	12.50	5	49	52.0	9.1	0.064	16.3	16.88	0.28	0.41	-25.7	Q	HS 0033+0533
0	52	5.57	0	35	38.4	28.6	0.024	16.3	16.80	1.04	0.399	-25.7	Q	Q 0049+0019A
0	57	9.93	14	46	10.4	26.7	0.246	15.9	16.11	1.12	0.171	-24.0	Q	PHL 909
1	20	17.29	21	33	46.6	25.0	0.023	15.5	15.80	0.54	1.500	-29.7	Q	PG 0117+213
1	39	55.80	6	19	22.5	8.4	0.031	15.7	16.55	0.60	0.396	-26.5	Q	PHL 1092
1	40	35.02	23	44	51.1	25.1	0.029	16.1	16.64	0.98	0.32	-25.4	Q	HS 0137+2329
1	41	59.60	6	12	5.5	2.7	0.049	16.3	16.27	0.56	0.345	-27.2	Q	PHL 1106
3	18	25.57	15	59	56.7	11.2	0.033	16.3	16.58	0.02	0.515	-25.9	Q	US 3828
3	39	9.60	3	45	52.5	23.7	0.038	16.4	17.55	0.44	0.199	-24.0	Q	RXS J03391+0346
4	24	46.85	0	36	6.4	7.4	0.052	16.1	16.75	1.26			BL	PKS 0422+00
8	15	59.21	41	44	57.1	17.9	0.021	15.8	15.97	0.32	1.28	-29.3	Q	KUV 08126+4154
8	22	36.88	54	18	36.4	33.7	0.042	16.3	16.65	1.12	0.086	-22.3	S1	SBS 0818+544
8	43	49.78	26	19	11.1	19.4	0.068	16.4	17.23	0.20	0.258	-24.7	Q	HS 0840+2630
8	59	24.35	46	37	17.3	22.3	0.047	16.5	16.89	0.74	0.923	-27.5	Q	US 2068
9	0	47.30	74	44	26.3	16.6	0.045	16.1			0.77	-27.4	Q	HS 0855+7456
9	19	57.63	51	6	9.1	17.1	0.039	15.8	16.35	-0.80	0.553	-27.0	Q	SBS 0916+513
9	25	14.35	54	44	27.2	10.4	0.048	15.9	16.66	-0.12	0.476	-26.3	Q	SBS 0921+549
9	29	9.82	46	44	24.1	15.9	0.025	15.6	15.66	0.18	0.240	-25.3	Q	US 645
9	36	25.45	39	49	33.7	24.8	0.033	16.1	16.81	0.82	1.25	-28.7	Q	KUV 09333+4003
9	37	1.93	34	25	0.0	12.7	0.031	16.0	16.55	0.22	0.908	-28.1	Q	Ton 1078
9	41	33.72	59	48	11.3	13.2	0.045	16.3	16.70	0.36	0.966	-27.9	Q	SBS 0938+600
9	56	49.89	25	15	16.0	8.0	0.048	16.2	16.92	0.84	0.712	-27.2	Q	OK 290
10	4	20.10	5	13	0.6	22.1	0.021	16.2	16.55	0.26	0.161	-23.8	Q	PG 1001+054
10	13	30.20	53	15	59.6	6.7	0.025	16.2	16.64	0.36	1.495	-29.1	Q	SBS 1010+535
10	15	57.04	1	9	13.7	16.1	0.082	16.3	16.97	0.94	0.779	-27.2	Q	Q 1013+0124
10	33	59.50	35	55	9.0	14.9	0.046	16.3	16.76	0.92	0.169	-23.8	Q	CSO 275
10	43	55.52	56	27	57.0	18.6	0.028	16.3	16.81	-0.40	1.951	-29.6	Q	SBS 1040+567
11	17	6.41	44	13	33.8	8.1	0.023	14.8	15.06	0.40	0.144	-24.9	Q	PG 1114+445
11	30	4.76	41	16	19.5	23.2	0.035	15.7	16.20	0.10	1.530	-29.5	Q	KUV 11274+4133
11	33	35.40	9	39	1.8	24.6	0.029	16.4	17.05	0.06	0.379	-25.5	Q	RX J11335+0939
11	43	47.71	11	28	48.1	20.6	0.046	15.5	16.38	0.80	0.118	-23.8	Q	RX J11437+1128
11	52	51.90	33	7	18.8	2.7	0.033	16.1	16.30	0.40	1.389	-28.8	Q	CSO 373
11	55	7.62	52	1	29.4	6.4	0.036	16.4	16.46	1.08	0.156	-23.5	Q	SBS 1152+523
11	59	6.78	53	6	43.5	6.1	0.043	16.5	17.19	0.36	0.482	-25.9	Q	MS 11565+5323
12	7	4.53	38	40	24.6	3.7	0.045	16.3	16.64	0.00	0.572	-26.4	Q	RXS J12070+3840
12	17	40.83	49	31	17.9	1.1	0.049	16.5	17.62	0.18	0.730	-26.6	Q	SBS 1215+497
12	22	10.01	27	19	2.3	6.4	0.046	15.9	16.90	0.52	0.442	-26.3	Q	RXS J12221+2719
12	23	0.23	55	40	0.3	9.4	0.057	16.5	17.48	0.48	0.905	-27.5	Q	SBS 1220+559
12	28	24.97	31	28	37.7	24.8	0.024	15.6	16.28	0.28	2.219	-30.4	Q	B2 1225+31
12	30	50.04	1	15	22.6	6.4	0.041	14.4	14.81	0.16	0.117	-24.8	Q	RX J12308+0115
12	33	26.05	45	12	23.1	11.2	0.032	16.5	16.91	-0.24	1.958	-29.4	Q	HS 1231+4528
12	44	10.82	17	21	4.5	16.3	0.027	15.7	16.58	0.74	1.283	-28.8	Q	PG 1241+176
13	6	5.72	80	8	20.5	10.9	0.035	16.3	18.35	1.01	1.183	-28.3	Q	S5 1305+80
13	13	21.39	78	21	53.9	11.9	0.026	15.6	15.86	0.22	2.00	-30.3	Q	HS 1312+7837
13	19	56.24	27	28	8.4	23.4	0.031	15.5	16.54	0.22	1.014	-28.7	Q	CSO 873
13	41	0.81	41	23	14.2	17.0	0.022	16.4	16.36	-0.02	1.204	-28.3	Q	PG 1338+416
13	47	19.40	59	2	32.5	10.3	0.025	16.2	16.48	0.22	0.768	-27.3	Q	SBS 1345+592
13	47	37.45	30	12	52.4	20.5	0.035	15.7	16.12	0.68	0.118	-23.6	Q	Q J1347+3012
13	51	28.30	1	3	38.5	17.5	0.040	16.5	17.35	0.58	1.086	-27.9	Q	Q 1348+0118
14	2	44.52	15	59	56.2	1.9	0.031	16.3	16.66	1.56	0.245	-24.5	BL	MC 1400+162
14	27	35.60	26	32	14.5	26.8	0.040	15.4	15.18	-0.72	0.366	-26.6	Q	PG 1425+267
14	36	45.79	63	36	37.6	32.1	0.038	15.7	16.61	-0.22	2.066	-30.4	Q	S4 1435+63
14	50	26.68	58	39	44.7	9.9	0.046	15.8	16.13	1.14	0.210	-23.8	Q	Mark 830
14	51	53.63	72	14	46.8	5.8	0.027	16.3	16.96	0.16	0.75	-27.1	Q	HS 1451+7227
15	27	28.64	65	48	10.3	14.0	0.046	16.2	16.77	0.56	0.345	-25.5	Q	FBS 1526+659
15	50	43.65	11	20	47.4	23.7	0.040	16.3	16.33	0.14	0.436	-25.9	Q	MC 1548+114
15	51	58.16	58	6	44.7	4.5	0.036	16.2	16.74	1.14	1.320	-28.7	Q	SBS 1550+582
16	19	40.54	25	43	23.3	13.1	0.035	16.4	16.62	1.36	0.268	-24.7	Q	RX J16196+2543
16	23	19.93	41	17	2.7	26.3	0.030	16.5	16.88	0.32	1.618	-28.9	Q	KUV 16217+4124
16	26	37.28	58	9	17.2	6.0	0.044	16.2	16.52	0.83	0.751	-27.2	Q	SBS 1625+582
16	28	25.70	8	33	0.1	10.1	0.031	16.4	17.22	0.32	0.44	-25.8	Q	HS 1626+0839
16	31	43.83	52	53	43.8	5.7	0.048	16.5	16.81	0.44	0.352	-25.2	Q	SBS 1630+530
16	32	1.11	37	37	50.0	14.5	0.034	16.0	16.60	0.54	1.478	-29.4	Q	PG 1630+377
16	32	34.68	73	59	43.0	3.2	0.030	16.1	17.97	1.30	0.208	-24.4	Q	RXS J16325+7359
16	34	29.01	70	31	32.3	1.2	0.049	14.9	15.26	1.03	1.337	-30.1	Q	PG 1634+706
16	37	7.53	41	40	26.9	17.0	0.028	16.2	16.28	1.60	0.765	-27.3	Q	KUV 16355+4146
17	1	0.62	64	12	9.3	19.0	0.035	15.9	16.03	0.18	2.736	-31.2	Q	HS 1700+6416
17	4	41.39	60	44	30.5	8.4	0.042	15.6	15.86	0.76	0.371	-26.3	Q	3C 351.0
17	6	48.06	32	14	22.9	17.0	0.029	16.2	16.94	0.66	1.070	-28.2	Q	RGB J1706+322
17	19	34.18	25	10	58.6	16.9	0.039	16.4	16.87	1.34	0.579	-26.4	Q	RX J17195+2510
22	53	7.37	19	42	34.7	21.5	0.039	16.4	16.75	0.92	0.284	-24.9	Q	HS 2250+1926
23	7	45.62	19	1	20.8	11.6	0.033	16.4	17.13	0.98	0.313	-25.0	Q	PKS 2305+18
23	11	59.50	9	26	1.4	7.4	0.048	16.3	17.51	0.16	0.479	-26.1	Q	RX J23119+0925
23	50	10.07	8	12	55.3	16.6	0.025	16.4	18.19	1.00	1.70	-29.1	Q	HS 2347+0756

Source LaTeX | All tables | In the text