Superoutburst of RX Vol



(Outburst CCD image by Peter Nelson: click to see the wide-field image)


(Outburst CCD image by Berto Monard: click to see the wide-field image)


(Outburst CCD image by Roland Santallo)

(vsnet-outburst 5482)

RX Vol appears to be in outburst.

VOLRX          030504.388   147  Stu.RASNZ
VOLRX          030504.442   147  Stu.RASNZ

Regards,
Rod Stubbings

(vsnet-alert 7727)

RX Vol is registered as UGSU: in GCVS (maximum 16p). The present likely outburst absolutely need further investigation. Time-resolved photometry is urgently encouraged (after confirmation of the outburst, naturally).

The catalog position is 08:39:32.30 -66:17:39.2 (J2000.0). We would be happy to receive representative images (in FITS) for accurate astrometry, as usual.

(vsnet-outburst 5485)

RX Vol outburst is the first one recorded that I know of.

Regards,
Rod Stubbings
(vsnet-alert 7729)

Dear colleagues,

The first outburst since the discovery of RX Vol was reported to VSNET. Follow-up obsevations are encouraged! The only one reference (Munari & Zwitter 1998, A&AS, 128, 277) picked by the ADS except for the DS catalog gives a quiescence V magnitude below 22 (the amplitude over 7 mag!?), while the finding chart given in the Downes catalog living edition show a faint object.

Best regards,
Daisaku Nogami

Astrometry

(vsnet-outburst 5487)

RX Vol astrometry by Peter Nelson

Peter Nelson's measurement:

Using GSC-ACT I get the following astrometry:
08 39 32.39
-66 17 39

84 stars used, average residual 0.35 arc"

===
The FITS image is also being examined by Yamaoka-san for accurate astrometry and quiescent identification.
Regards,
Taichi Kato

(Outburst CCD image by Peter Nelson)

Likely emerging superhumps

(vsnet-alert 7732)

RX Vol: likely emerging superhumps!

Peter Nelson provided a 2.7-hour time-series photometry. The data show 0.1 mag modulations, which are probably emerging superhumps. The present period is about 0.06 d, suggesting that RX Vol belongs to a short-period SU UMa-type dwarf nova (as represented by WZ Sge-type stars). The fully developed superhumps may have different periods, as we have seen in V1028 Cyg. We strongly encourage further continuous observations!

We will soon put information on the VSNET website.

Regards,
Taichi Kato
VSNET Collaboration team

Fully grown superhumps!

(vsnet-alert 7736)

RX Vol: definite SU UMa-type dwarf nova with fully grown superhumps!

Dear Colleagues,

We have received further data from Roland Santallo and Peter Nelson. As Peter Nelson reported in [vsnet-outburst 5502], the star now exhibits decisive superhumps with a mean amplitude of 0.22 mag.

The period determined from the May 5 data is 0.0613(2) d, which confirms the earlier suggestion that RX Vol belongs to short-period SU UMa stars. The earlier emergence of a seemingly slightly shorter period may represent a variety of "early superhumps", which was suspected in T Leo with Psh = 0.0602 d (Kato 1997, PASJ 49, 583). Please note that EG Cnc (WZ Sge-type star) also has a similar period (Psh = 0.06038 d). Combined with the presumably large outburst amplitude, RX Vol is expected to show some sort of similar activities (Psh increase, rebrightening etc.) as seen in WZ Sge stars. Further continued observations are very strongly encouraged!!

Regards,
Taichi Kato
VSNET Collaboration team

VSNET light curve (requires Java)

Light curve

VSNET data search

Search!


Return to HomePage

Return to Daisaku Nogami's page


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

Powered by ooruri technology