Table 1: Targets: basic properties.

Object Name
RA Dec z $N_{\rm H,Gal}$ Type $L_{2-10~{\rm keV}}$ Ref.
       (1) (2) (3) (4) (5) (6) (7) (8)

PKS 0548-322
05 50 40.80 -32 16 17.80 0.069 2.52 HBL 31.9 KU98
3C 371 18 06 50.60 +69 49 28.10 0.051 4.73 LBL 1.5 DO01
PKS 2005-489 20 09 25.40 -48 49 54.00 0.071 5.08 HBL 62.2 PA01
BL Lac 22 02 43.30 +42 16 39.80 0.069 21.6 LBL 6.1 RA02
1ES 2321+419 23 23 52.10 +42 10 59.00 0.059 10.9 HBL 1.5 PE96
1ES 2344+514 23 47 04.80 +51 42 17.40 0.044 16.8 HBL 3.9 DO01
Columns: $\rm (1)=Source$ name; $\rm (2)=Right$ Ascension at J2000; $\rm (3)=Declination$ at J2000; $\rm (4) =Redshift$; $\rm (5)=Galactic$ column density in units of  $10^{20}~{\rm cm^{-2}}$. The Galactic values was derived from the nh program at HEASARC (based on Dickey & Lockman 1990); $\rm (6)=Source$ type: $\rm HBL=High$-Energy Peaked BL Lacertae object, $\rm LBL=Low$-Energy Peaked BL Lacertae object; $\rm (7)=Intrinsic$ X-ray luminosity (in units of 1043 erg s-1) between 2 and 10 keV from data in literature; $\rm (8)=Reference$ for the X-ray luminosity: $\rm KU98=Kubo$ et al. (1998); $\rm DO01=Donato$ et al. (2001); $\rm PA01=Padovani$ et al. (2001); $\rm RA02=Ravasio$ et al. (2002); $\rm PE96=Perlman$ et al. (1996).

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