[vsnet-alert 11238] Re: SDSS J140429.37+172359.4: large-amplitude modulation

[var at kozmos.sk]

I have two nights on this target. The amplitude of light variations  
became higher last night. Look at  
http://var2.astro.cz/EN/obslog.php?obs_id=1183324800&projekt=%&star=SDSS1404&lang=en
The data were send to vsnet campaign report.
Clear Skies!
Pavol A. Dubovsky

> SDSS J140429.37+172359.4: large-amplitude modulation
>
>    Kyoto team (Ohshima-san et al.) observed this dwarf nova
> (=1RXS J140429.5+172352), reported to be in outburst (cvnet message),
> on May 2 and detected 0.4-mag variation.  Although the waveform of the
> first hump resembled that of a superhump, the exact periodicity was not
> confirmed due to the subsequent passage of clouds.  If this was indeed
> a superhump, the profile suggest a period of 1 hr or even shorter
> (and would be amazing!).  Alternatively, the object might resemble
> IQ Eri, which showed large-amplitude irregular variations.
> This finding appears to be consistent with the report by Etienne Morelle
> in cvnet, and further analyzed by Jeremy Shears.
> Further observations are strongly urged to better understand the
> nature of the variation.
>