[vsnet-campaign-dn 5051] Re: [vsnet-alert 9440] Superhumps in SDSS J155644.24-000950.2

[Hiroyuki Maehara]

On Wed, Aug 01, 2007 at 04:09:26PM +0900, Hiroyuki Maehara wrote:
> The superhump period estimated from two nights data is 0.08377(10)
> days or 0.07733(9) days.

According to Woudt et al., 2004, MNRAS, 351, 1015(astro-ph/0403435), 
SDSS J1556 during quiescence shows a periodic modulation with a period of
0.07408 days. If this period corresponds to the orbital period, 
a superhump period candidate of 0.07733(9) days may be a true superhump
period.
But superhump maximum timings from our data suggest that the true
period is 0.08377(10) days.

Further time-series observations are encouraged.
If you succeed in observing this star, please send your data to following
e-mail address:
vsnet-campaign-report at ooruri.kusastro.kyoto-u.ac.jp

Best regards,
Hiroyuki Maehara
VSNET Collaboration Team