[vsnet-alert 5251] Re: PQ Aql outburst

[Patrick Schmeer <p.schmeer@mx.uni-saarland.de>]

On Tue, Sep 12, 2000 at 07:54:18PM +0900, Taichi Kato wrote:
> PQ Aql outburst
> 
>    The long-period SU UMa-type candidate PQ Aql is reported to be in
> outburst.  The last outburst was reported in 2000 March by Patrick Schmeer.
> A long outburst was observed in 1999 November (see below).
 
All in all I observed three PQ Aql outbursts with the IRO:
1999 Nov.  8          mag 14.5:   supermaximum       (vsnet-alert 3676) 
2000 Mar. 17.519 UT   mag 15:     normal outburst    (vsnet-alert 4419) 
2000 Apr. 17          mag 15.5:   supermaximum       (vsnet-alert 4641) 

The mean cycle length may be about 1 month and the supercycle about
5 months, so the current outburst could well be another supermaximum.
 
>   YYYYMMDD(UT)   mag  observer
>   20000906.810  <151  (T. Kinnunen)
>   20000907.810  <153  (T. Kinnunen)
>   20000909.819  <153  (T. Kinnunen)
>   20000910.810  <153  (T. Kinnunen)
>   20000911.810   154  (T. Kinnunen)
> 
>   Time-resolved photoemtry during the present outburst is strongly encouraged
> in the context of continuing VSNET campaign.
> 
> cf. vsnet-alert 3690:
> 
> PQ Aql time-resolved CCD photometry
> 
>    From the CCD observation of PQ Aql on Nov. 9, we have detected light
> modulations (~0.10 mag), which may be attributable to superhumps.
> The possible period of the light modulation was 0.1 d or slightly longer,
> which makes definitive period determination difficult from a 3-hour run.
> Further observations are strongly urged to accurately determine the
> nature of the variability.
> 
> Regards,
> Taichi Kato, Makoto Uemura
 
I thought PQ Aql had been confirmed as an SU UMa-type dwarf nova (cf. the
following report).
--------------------------------------------------------------------------
Date: Mon, 15 Nov 1999 19:54:02 +0900 (JST)
From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
Subject: [vsnet-obs 24717] PQ Aql (Ouda team) Nov. 13

PQ Aql (Ouda team) Nov. 13

  Representative averaged magnitude:

AQLPQ 991113.445 15.42C Oud  time-series, clear superhumps

Observers: T. Kato and M. Uemura
Telescope: 25-cm SCT + ST-7 unfiltered
Comparison: GSC1066.287, Rc=10.09 assumed
--------------------------------------------------------------------------

Some CBAers (e.g. L.T. Jensen, T. Vanmunster) did also obtain time-series
during the 1999 November superoutburst, but I can't remember having seen
their results.
 
Regards,
Patrick

VSNET Home Page

Return to Daisaku Nogami

---

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