catalogues derived from the [*Rosat*]{} All-Sky X-ray Survey (RASS). None of our sources has an X-ray counterpart within 20 arcsec of the optical position. In contrast 30 of the 48 CVs with orbital periods in the range 70–120 mins in the 2009 catalogue of Ritter & Kolb (2003) were detected in the RASS. Although at this stage we cannot preclude that none of our 31 sources are CVs we consider this rather unlikely.

  --------- ------------ ------------- --------- --------- ------ ------- -------- ------- ------------ ------------- ------- ----------
  Short       $\alpha$     $\delta$          $l$       $b$  $g$     $g-r$   Period Amp         $d$, $z$      $d$, $z$ Spec?          Low
  ID          (J2000)       (J2000)      (J2000)   (J2000)                  (mins) (mag)          (kpc)         (kpc)           $A_{V}$?
                                                                                                     FM            FO         
  J000114    00:01:14.7   +53:43:05.4     115.46     -8.42  17.8    -0.12     64.3 0.50       6.0, -0.9     5.0, -0.7         
  J000134    00:01:34.8   +53:51:42.2     115.54     -8.29  17.0     0.19     73.5 0.07       4.2, -0.6     3.5, -0.5         
  J000147    00:01:47.5   +53:23:18.7     115.48     -8.76  16.8     0.35     69.6 0.45       3.4, -0.5     2.8, -0.4         
  J030556    03:05:56.8   –00:36:16.2     179.16    -48.23  20.3    -0.08     82.9 0.28      30.0,-22.4   24.8, -18.5 SDSS             Y
  J050351    05:03:51.4   +35:08:02.1     169.90     -3.83  18.4     0.30     62.9 0.14       3.4, -0.2     2.8, -0.2         
  J065521    06:55:21.2   +10:41:58.9     203.82      5.72  15.9     0.12     60.9 0.13        2.7, 0.3      2.2, 0.2         
  J065541    06:55:41.8   +10:44:21.5     203.82      5.81  19.3     0.30     56.0 