[vsnet-alert 13410] NY Her outburst and classification

[Taichi Kato]

NY Her outburst and classification

   CRTS has detected this variable in outburst:

CSS110610:175253+292219 http://nesssi.cacr.caltech.edu/catalina/20110610/1106101290854138513.html 17 52 52.59 +29 22 18.9 16.39 No SDSS object CV

   According to the CRTS light curve, the object appears to be a dwarf nova.
According to GCVS, the object is classified as a W Vir star with a period
of 6.3146 d.

This reference states:
http://adsabs.harvard.edu/abs/1988ATsir1534...17P

  * The GCVS period was not confirmed.
  * The object is at mag ~18 on POSS and blue.
  * A mean periodicity of 67.7067 d was derived
  * In addition to the main period, short outbursts were irregularly
    observed.
  * The object possibly varies 2 mag/d.
  * Short segments (several days) of faint state between outbursts were
    recorded.
  * The author suggests type ISA, excluding the Cepheid classification.

   NY Her appears to be a very interesting object to make intensive
observation.  The suggested two periods may suggest super- and normal
outbursts (then it might even be an ER UMa-type object!).