[vsnet-alert 12363] HT Cas: further development of superhumps

[Taichi Kato]

   See Enrique de Miguel's comment:

   The superhump period has been stabilized to 0.07644(9) d.  There may
be even some hint of a positive Pdot.

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Comments:     Difficult to know if this one is nicer and 
              more interesting than the one obtained yesterday. 
              Note that:
               (i) a larger aperture instrument is used;
              (ii) time resolution has been increased.

              In addition to fully-developed superhumps (of similar
              amplitude than those observed yesterday), 
              the most salient feature I can see from today's run
              is the growth of a second modulation, between the
              main superhump peak and the orbital eclipse.
              One can barely notice this second peak by the begining
              of the run, but cycle after cycle, it keeps growing
              and becomes more prominent by the end of the run.
              The run has been extended up to high airmass values,
              so the last data points (~ 5-10 last minutes) suffer
              from a larger uncertainty.
              Beautiful!