[vsnet-chat 7472] Re: [VSS-members] Re: [AVSON] EK TrA Bright Outburst

[Peter F Williams]

removed vsnet alert / cvnet outburst
added vsnet chat / cvnet discussion

Hi Stan,

Yes, I remember all those "special programs" back in the 1970s and 80s,
providing alert notification to professional researchers for particular
groups of stars.  Made us amateurs feel "loved".  Don't have that these days
and seems the pros only look at stars north of the equator.....

Perhaps this is a service the new VSS could promote whereby lists of stars
could be distributed through the VSS-members list (and others) requesting a
concentrated effort to monitor for outbursts/activity and which is then
reported through the usual alert groups and/or direct to the
researcher/group.  A request for special attention usually tends to motivate
observers and some brief feed back make it even more satisfying.  And Rod
does suffer a cloudy night occasionally!

Peter Williams

  -----Original Message-----
  From: vss-members at googlegroups.com [mailto:vss-members at googlegroups.com]On
Behalf Of Stan Walker
  Sent: Sunday, 19 July 2009 8:18 AM
  To: vss-members at googlegroups.com; vsnet alert; cvnet outburst;
AVSON at yahoogroups.com
  Subject: [VSS-members] Re: [AVSON] EK TrA Bright Outburst


  Hi Peter,

  A couple of old friends in these two stars.

  I had a look at ASAS3 for EK but the data there are not very helpful with
nothing which resembles an outburst. A sound reason for visual measures. I
seem to remember that it was a confusing field, with another star each side
of EK which made it hard to observe with PEP.

  The GCVS gives a superhump period of 0.06492 which is attributed to Vogt
and Semeniuk in 1980 but I thought that these had been observed well before
this - probably before the Bateson article which was probably published
about 1978 (the C76 was meant to refer to the year but they were always very
late). We got a similar period at Auckland during one outburst, so there's
not much doubt that they are supermaxima.

  Warner was observing a lot of these stars in the 1970s and I thought he
had picked up this one along with Z Cha rather earlier than 1980. But it was
all a long time ago and the memory is vague.

  Regards,
  Stan

    ----- Original Message -----
    From: Peter F Williams
    To: VSS Members ; vsnet alert ; cvnet outburst ; AVSON at yahoogroups.com
    Sent: Sunday, July 19, 2009 12:48 AM
    Subject: [VSS-members] RE: [AVSON] EK TrA Bright Outburst


    BV Cen and EK TrA outbursts continue :

    CENBV    20090718.445    126    WPX
    TRAEK    20090718.449    109    WPX


    The current outburst of EK TrA appears to be bright and long, the star
now remaining near maximum for at least 4 days.  Both Narrow and Broad
maxima were identified by Frank Bateson (Publ 4, 1976 VSS RASNZ) where the
variable remains brighter than mag 13 for some 3 days and 10 days,
respectively but it is not clear from the visual data alone whether the
broad maxima are true super maxima.  The current outburst would seem a good
target for southern CCDs.

    Regards

    Peter Williams


      -----Original Message-----
      From: Peter F Williams [mailto:pfwilliams at onaustralia.com.au]
      Sent: Tuesday, 14 July 2009 11:40 PM
      To: AVSON at yahoogroups.com; cvnet outburst; vsnet alert
      Subject: RE: [AVSON] EK TrA Bright Outburst


      Further observations:

      ARAAT    20090714.513    128    WPX
      CENBV    20090714.475    125    WPX
      TRAEK    20090714.520    109    WPX
      TRAEK    20090714.545    109    WPX

      Regards

      Peter Williams
      Heathcote NSW



        -----Original Message-----
        From: AVSON at yahoogroups.com [mailto:AVSON at yahoogroups.com]On Behalf
Of Peter F Williams
        Sent: Tuesday, 14 July 2009 9:54 PM
        To: cvnet outburst; vsnet alert
        Cc: AVSON VSONetwork
        Subject: [AVSON] EK TrA Bright Outburst





        The dwarf nova EK TrA is undergoing a bright outburst as per the
following
        single visual observation:

        TRAEK 20090714.480 109 WPX

        Regards

        Peter Williams
        Heathcote NSW

        [Non-text portions of this message have been removed]



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