Table 1: Comparison of projected mass estimates interior to a given radius in the literature.
Reference r M(<r) Method

'' 10¹⁴ $M_{\odot}$ (Remark)

Gitti et al. (2007) 35 2.38 $\pm$ 0.27 X-ray (SO)

Gitti et al. (2007) 35 2.05 $\pm$ 0.37 X-ray (DDg1)

Schindler et al. (1997) 35 1.78 X-ray

Sahu et al. (1998) 35 5.34 SL

This work 35 2.56 $\pm$ 0.12 SL

Bradac et al. (2005) 90 12.00 $\pm$ 3.00 SWL

This work 90 8.69 $\pm$ 1.37 SL

Kling et al. (2005) 124 12.86 $\pm$ 2.86 WL (SIS)

Kling et al. (2005) 124 $15.00 _{\rm -2.14}^{+1.43}$ WL (NFW)

This work 124 12.60 $\pm$ 2.58 SL

Gitti et al. (2007) 147 9.95 $\pm$ 1.03 X-ray (SO)

Gitti et al. (2007) 147 9.17 $\pm$ 1.79 X-ray (DDg1)

Fischer & Tyson (1997) 294 28.81 $\pm$ 6.78 WL