Table 2: $3\sigma $ upper limits for undetected Praesepe members. Upper limits have been derived from the summed dataset.

Name		 RA$_{\rm X}$ DEC$_{\rm X}$ count rate $L_{\rm X}$ V B-V Mem Notes
  (J2000) (cts/ksec) (a)   $(R-I)_{\rm c}$*   (b)

KW 150		 $8\>39\>06.11$ $19\>40\>36.5$ 0.54 1.44 7.45 0.26 Y?  
KW 229 $8\>39\>57.78$ $19\>32\>29.2$ 0.19 0.51 7.54 0.25 Y SB2, X
KW 276 $8\>40\>18.10$ $19\>31\>55.1$ 0.21 0.55 7.54 0.16 Y SB
KW 284 $8\>40\>20.14$ $19\>20\>56.4$ 0.40 1.06 6.77 0.27 Y SB2
KW 300 $8\>40\>27.01$ $19\>32\>41.3$ 0.22 0.59 6.30 0.17 Y? SB2
KW 348 $8\>40\>56.30$ $19\>34\>49.2$ 1.29 3.43 6.78 0.17 Y? SB
KW 573 $8\>40\>13.83$ $19\>44\>55.9$ 0.80 2.11 16.06 1.50 Y  
JC 212 $8\>40\>31.55$ $19\>41\>43.2$ 0.41 1.10 15.20 1.47 Y  
JS 254 $8\>38\>53.59$ $19\>34\>17.0$ 0.62 1.63 14.16 1.33 Y  
JS 301 $8\>39\>36.51$ $19\>29\>07.9$ 0.25 0.66 15.12 1.48 Y  
JS 713 $8\>39\>46.70$ $19\>44\>12.0$ 0.46 1.23 18.35   Y? $(V-I)_{\rm k} = 2.82$
HSHJ 304 $8\>40\>13.00$ $19\>45\>49.7$ 0.81 2.14   2.00* Y  
RIZpr 11 $8\>39\>47.72$ $19\>28\>03.6$ 0.22 0.59     Y $I_{\rm c} =19.47$, $I_{\rm c}-K_{\rm UKIRT} = 3.61$
(a) Luminosity in the ROSAT band (0.1-2.4 keV) in units of 1028 erg s-1.
(b) An X indicates ROSAT detections. For the other notes see text
RIZpr 11 is from Pinfield et al. (1997).


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