XBL AGN

This is the group of X-ray selected BL Lac objects which are the only confirmed extragalactic sources above the GeV range. It is anticipated that VERITAS will detect between 20 and 30 of the sources depending somewhat on the source spectra and the amount of attenuation above energies of 300 GeV. Table 2 lists the 33 known XBL AGN which are visible with VERITAS and have a cosmological redshift $z \leq 0.5$ . As the ROSAT all sky survey analysis is completed the number of candidate sources is expected to increase.

**Table 2:** XBL AGN with $z \leq 0.5$ visible to VERITAS.
	Name	R.A. (J2000)	Dec. (J2000)	z
1	1ES0120+340	01^h 23 $^{\prime}$ 08 $^{\prime\prime}$ .6	+34 $^{\circ}$ 20 $^{\prime}$ 47 $^{\prime\prime}$ .5	0.272
2	1ES0145+138	01^h 48 $^{\prime}$ 29 $^{\prime\prime}$ .7	+14 $^{\circ}$ 02 $^{\prime}$ 18 $^{\prime\prime}$ .0	0.125
3	1ES0158+003	02^h 01 $^{\prime}$ 06 $^{\prime\prime}$ .3	+00 $^{\circ}$ 34 $^{\prime}$ 00 $^{\prime\prime}$ .0	0.299
4	3C66A	02^h 22 $^{\prime}$ 39 $^{\prime\prime}$ .6	+43 $^{\circ}$ 02 $^{\prime}$ 08 $^{\prime\prime}$ .0	0.444
5	1ES0229+200	02^h 32 $^{\prime}$ 48 $^{\prime\prime}$ .6	+20 $^{\circ}$ 17 $^{\prime}$ 17 $^{\prime\prime}$ .0	0.139
6	RGB0326+024	03^h 26 $^{\prime}$ 14 $^{\prime\prime}$ .0	+02 $^{\circ}$ 25 $^{\prime}$ 16 $^{\prime\prime}$ .0	0.147
7	1ES0347-121	03^h 49 $^{\prime}$ 23 $^{\prime\prime}$ .2	-11 $^{\circ}$ 59 $^{\prime}$ 27 $^{\prime\prime}$ .0	0.188
8	1H0413+009	04^h 16 $^{\prime}$ 52 $^{\prime\prime}$ .4	+01 $^{\circ}$ 05 $^{\prime}$ 24 $^{\prime\prime}$ .0	0.287
9	1ES0446+449	04^h 50 $^{\prime}$ 07 $^{\prime\prime}$ .2	+45 $^{\circ}$ 03 $^{\prime}$ 12 $^{\prime\prime}$ .0	0.203
10	1H0506-039	05^h 09 $^{\prime}$ 38 $^{\prime\prime}$ .1	-04 $^{\circ}$ 00 $^{\prime}$ 46 $^{\prime\prime}$ .0	0.304
11	1ES0525+713	05^h 31 $^{\prime}$ 41 $^{\prime\prime}$ .7	+71 $^{\circ}$ 22 $^{\prime}$ 17 $^{\prime\prime}$ .0	0.249
12	MS0737.9+7441	07^h 44 $^{\prime}$ 05 $^{\prime\prime}$ .7	+74 $^{\circ}$ 33 $^{\prime}$ 58 $^{\prime\prime}$ .0	0.315
13	1ES0806+524	08^h 09 $^{\prime}$ 49 $^{\prime\prime}$ .2	+52 $^{\circ}$ 18 $^{\prime}$ 58 $^{\prime\prime}$ .4	0.138
14	1ES0927+500	09^h 30 $^{\prime}$ 37 $^{\prime\prime}$ .6	+49 $^{\circ}$ 50 $^{\prime}$ 26 $^{\prime\prime}$ .0	0.188
15	1ES1011+496	10^h 15 $^{\prime}$ 04 $^{\prime\prime}$ .2	+49 $^{\circ}$ 26 $^{\prime}$ 00 $^{\prime\prime}$ .0	0.200
16	RGB1031+508	10^h 31 $^{\prime}$ 18 $^{\prime\prime}$ .5	+50 $^{\circ}$ 53 $^{\prime}$ 35 $^{\prime\prime}$ .8	0.239
17	Markarian421	11^h 04 $^{\prime}$ 27 $^{\prime\prime}$ .3	+38 $^{\circ}$ 12 $^{\prime}$ 31 $^{\prime\prime}$ .8	0.031
18	RGB1120+422	11^h 20 $^{\prime}$ 48 $^{\prime\prime}$ .1	+42 $^{\circ}$ 12 $^{\prime}$ 12 $^{\prime\prime}$ .5	0.124
19	Markarian180	11^h 36 $^{\prime}$ 26 $^{\prime\prime}$ .4	+70 $^{\circ}$ 09 $^{\prime}$ 27 $^{\prime\prime}$ .3	0.046
20	1H1219+301	12^h 21 $^{\prime}$ 21 $^{\prime\prime}$ .9	+30 $^{\circ}$ 10 $^{\prime}$ 37 $^{\prime\prime}$ .1	0.182
21	MS1229.2+6430	12^h 31 $^{\prime}$ 31 $^{\prime\prime}$ .4	+64 $^{\circ}$ 14 $^{\prime}$ 18 $^{\prime\prime}$ .4	0.170
22	1ES1255+244	12^h 57 $^{\prime}$ 31 $^{\prime\prime}$ .9	+24 $^{\circ}$ 12 $^{\prime}$ 40 $^{\prime\prime}$ .0	0.141
23	1E1415+2557	14^h 17 $^{\prime}$ 56 $^{\prime\prime}$ .7	+25 $^{\circ}$ 43 $^{\prime}$ 25 $^{\prime\prime}$ .0	0.237
24	1H1430+423	14^h 28 $^{\prime}$ 32 $^{\prime\prime}$ .6	+42 $^{\circ}$ 40 $^{\prime}$ 21 $^{\prime\prime}$ .1	0.130
25	RGB1442+120	14^h 42 $^{\prime}$ 48 $^{\prime\prime}$ .2	+12 $^{\circ}$ 00 $^{\prime}$ 41 $^{\prime\prime}$ .0	0.162
26	MS1552.1+2020	15^h 54 $^{\prime}$ 24 $^{\prime\prime}$ .1	+20 $^{\circ}$ 11 $^{\prime}$ 25 $^{\prime\prime}$ .4	0.222
27	1ES1553+113	15^h 55 $^{\prime}$ 43 $^{\prime\prime}$ .2	+11 $^{\circ}$ 11 $^{\prime}$ 21 $^{\prime\prime}$ .0	0.360
28	Markarian501	16^h 53 $^{\prime}$ 52 $^{\prime\prime}$ .2	+39 $^{\circ}$ 45 $^{\prime}$ 36 $^{\prime\prime}$ .6	0.033
29	I Zw 187	17^h 28 $^{\prime}$ 18 $^{\prime\prime}$ .6	+50 $^{\circ}$ 13 $^{\prime}$ 10 $^{\prime\prime}$ .5	0.055
30	1ES1741+196	17^h 43 $^{\prime}$ 57 $^{\prime\prime}$ .5	+19 $^{\circ}$ 35 $^{\prime}$ 10 $^{\prime\prime}$ .0	0.083
31	1ES1959+650	19^h 59 $^{\prime}$ 59 $^{\prime\prime}$ .9	+65 $^{\circ}$ 08 $^{\prime}$ 55 $^{\prime\prime}$ .0	0.048
32	1ES2326+174	23^h 29 $^{\prime}$ 03 $^{\prime\prime}$ .3	+17 $^{\circ}$ 43 $^{\prime}$ 30 $^{\prime\prime}$ .0	0.213
33	1ES2344+514	23^h 47 $^{\prime}$ 04 $^{\prime\prime}$ .8	+51 $^{\circ}$ 42 $^{\prime}$ 18 $^{\prime\prime}$ .0	0.044