Table 2: Coordinates (equinox: J2000) and 90% confidence level errors of the positions of the X-ray source 4U 1700+24 and of the optical star HD 154791.
Source RA Dec Error Spacecraft Reference
  (J2000) (J2000)   and instrument  

HD 154791

 17$^{\rm h}$06$^{\rm m}$34 $\hbox{$.\!\!^{\rm s}$ }$5183 +23$^{\circ}$58'18 $\hbox{$.\!\!^{\prime\prime}$ }$554 0 $\hbox{$.\!\!^{\prime\prime}$ }$014 Hipparcos Perryman et al. (1997)
4U 1700+24 17$^{\rm h}$06$^{\rm m}$34 $\hbox{$.\!\!^{\rm s}$ }$517 +23$^{\circ}$58'18 $\hbox{$.\!\!^{\prime\prime}$ }$66 0 $\hbox{$.\!\!^{\prime\prime}$ }$6 Chandra/HRC  this paper
4U 1700+24 17$^{\rm h}$06$^{\rm m}$34 $\hbox{$.\!\!^{\rm s}$ }$6 +23$^{\circ}$58'14 $\hbox{$.\!\!^{\prime\prime}$ }$0 2 $\hbox{$.\!\!^{\prime\prime}$ }$1 ROSAT/HRI Morgan & Garcia (2001)
4U 1700+24 17$^{\rm h}$06$^{\rm m}$34 $\hbox{$.\!\!^{\rm s}$ }$6 +23$^{\circ}$58'17 $\hbox{$.\!\!^{\prime\prime}$ }$3 3 $\hbox{$.\!\!^{\prime\prime}$ }$5 ROSAT/PSPC Morgan & Garcia (2001)
4U 1700+24 17$^{\rm h}$06$^{\rm m}$34 $\hbox{$.\!\!^{\rm s}$ }$56 +23$^{\circ}$58'18 $\hbox{$.\!\!^{\prime\prime}$ }$7 4'' XMM-Newton/EPIC this paper


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