[vsnet-campaign 327] QW Ser

[Rudolf Novak <rudolfn@physics.muni.cz>]

Dear colleagues,

More precise inspection of light curve of QW Ser gives period 0.0773(1)
and amplitude 0.15(2) mag in R-band. This is in a quite good agreement
of the report of dr. Pavlenko. The difference of period estimation could
be caused by the fact, that dr. Pavlenko did not covered whole superhump
cycle.

 On the light curve which is attached as an 20kb GIF are visible two
superhump maxima and minima. On the descending branch there is a larger
scater. Personaly I think this should be some reflection of QPOs 'cause
there is no reason to have 2x larger scatter in a same brightness in my
CCD frames. This should be certainly commented by others here.

The data were obtained on Nicholas Copernicus Observatory in Brno (Czech
Republic), using 40cm Newtonian telescope and CCD camera ST-7 (R-band
Kron-Cousins filter). Each exposure was 45 seconds. No points were
omitted, no filter was applied, modified JDs are without helliocentric
correction.

Hope that other observers will join the VSNET-campaign team on QW Ser to
obtain more and precise data to have information about period behavior
during the superoutburst of this star. Any comments are welcome.

Have a nice day

rudolf 

-- 
*******************************
Rudolf Novak
N. Copernicus Observatory Brno, CR
http://codel.astronomy.cz

VSNET Home Page

---

vsnet-adm@kusastro.kyoto-u.ac.jp

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp