[vsnet-alert 12018] SDSS J090350.7+330036.1: stage transition

[Taichi Kato]

SDSS J090350.7+330036.1: stage transition

   Most recent data from Enrique de Miguel Agustino indicate that a stage
B-C transition has occurred.  The transition occurred on May 30, when
the superhunp period discotinuously decrased.

comment by de Miguel Agustino (start of the fading?)

              Plotting all the data up to now, this object is seen
              to display a slow fading rate of approximately 0.10-0.12
              mag/day and have entered a plateau for the last 3 runs
              with no appreciable change in the mean brightness 
              (this is supported by two additional runs provided 
              by another user in USA). A fast decay to quiescence is
              expected to take place at any moment, but the object
              may well remain in the plateau for some more days.

               The superhump period is 0.06032 d, but still,
              I won't give too much credit
              to this until I do a consistent analysis. 

                 Eclipse timing:

              run    E      HJD                O-C
              01     0   2455340.38225(17)   0.00008
                     1   2455340.44121(20)  -0.00004
              02    17   2455341.38710(18)   0.00066
                    18   2455341.44651(10)   0.00099
              03    35   2455342.44915(07)  -0.00063
              05    68   2455344.39911(14)  -0.00013
              06    85   2455345.40308(10)  -0.00042
              07   102   2455346.40804(08)   0.00027
              08   119   2455347.41128(27)  -0.00076
              09   135   not included 
                   136   2455348.41642(07)   0.00012  
              10   152   2455349.36137(12)  -0.00012 
                   153   2455349.42068(11)   0.00011

              A linear regression yields:

              HJD(min) = 2455340.3822(3) + 0.0590745(29) * E