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  <VOEvent xmlns="http://www.ivoa.net/xml/VOEvent/v2.0" xmlns:voe="http://www.ivoa.net/xml/VOEvent/v2.0" version="2.0" role="observation" ivorn="ivo://archive.aavso/archive/voevents#alertnotice459" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/VOEvent/v2.0  http://www.ivoa.net/xml/VOEvent/VOEvent-v2.0.xsd">
    <Description xmlns="http://jabber.org/protocol/pubsub#event">
      Alert Notice from the AAVSO
    </Description>
    <Who xmlns="http://jabber.org/protocol/pubsub#event">
      <AuthorIVORN>
        ivo://archive.aavso/
      </AuthorIVORN>
      <Author>
        <shortName>
          AAVSO
        </shortName>
        <contactName>
          Richard C.S. Kinne
        </contactName>
        <contactEmail>
          rkinne at aavso.org
        </contactEmail>
      </Author>
      <Date>
        2012-06-06T13:36:25
      </Date>
    </Who>
    <Reference xmlns="http://jabber.org/protocol/pubsub#event" uri="http://www.aavso.org/publications_files/alerts/alert459.shtml" />
    <What xmlns="http://jabber.org/protocol/pubsub#event">
      <Param name="aavsoNumber" value="459" />
      <Param name="event" value="AAVSO Alert Notice 459: Monitoring of RU Peg requested for Swift observations" />
      <Param ucd="meta.link.url" name="link" value="http://www.aavso.org/aavso-alert-notice-459">
        <Description>
          Link back to the AAVSO web page
        </Description>
      </Param>
      <Param ucd="meta.id" name="objectName" value="RU Peg">
        <Description>
          Standard name for the astronomical object
        </Description>
      </Param>
      <Param dataType="float" ucd="phot.mag" name="magnitude" value="12.9">
        <Description>
          Approximate magnitude of the object.
        </Description>
      </Param>
      <Param name="body">
        <Value>
          Monitoring of RU Peg requested for Swift observations

Dr. Koji Mukai (Universities Space Research Association/NASA 
Goddard Space Flight Center) has requested AAVSO observers'
assistance in monitoring the SS Cyg-type dwarf nova RU Peg in 
support of target-of-opportunity observations with the NASA 
Swift satellite during an outburst.

His observations will be targeted during the rise to outburst 
and during late decline from outburst. Thus, your prompt 
notification to AAVSO Headquarters of activity in RU Peg will 
be crucial to the success of this campaign.

The campaign will run from now through March 31, 2013. According 
to Dr. Mukai, although RU Peg is observable with Swift from 
mid-April to mid-January, the best time of the year for Swift is 
late June through late October. However, he notes, there are ~3 
days every month when it is too close to the Moon (around July 
7, August 4, August 31, September 27, and October 25).

According to observations in the AAVSO International Database, 
the last outburst of RU Peg occurred 2012 April 7, reached visual
magnitude 10.1, and was brighter than magnitude 12.0 for 12 days. 
Around 12.9 at minimum, it is currently at magnitude 13.1 (M. 
Komorous, London, ONT, Canada). The next outburst is expected to 
occur mid-June through mid-July.

Visual and CCD observations (filtered preferred to unfiltered) 
are appropriate for this campaign. Observers are requested to 
monitor RU Peg duning minimum, throughout the next outburst,
and after return to minimym, and report their observations in 
a timely manner. If RU Peg appears to be brightening from 
minimum, please report your observations immediately to the AAVSO. 
If it is brighter than magnitude 12.3, please also send an email 
report to Elizabeth Waagen (eowaagen@aavso.org) and Matthew
 Templeton (matthewt@aavso.org).  

Please be aware that there is a ~12.5-magnitude star 11&quot; NE of 
RU Peg. Be sure to use a chart that goes deep enough to clearly
show the locations of both RU Peg and the 12.5 star, and please
be careful not to push your telescope too far.

Dr. Mukai writes: &quot;In the famous AAVSO/EUVE/RXTE campaign on SS 
Cyg (Mattei et al. 2000JAVSO..28..160M), the hard X-ray flux 
went up (with a delay) during the rise, then suddenly dropped; 
there was a corresponding flux enhancement episode during the 
decline.  We know that, during the peak of the outburst, many 
dwarf novae are hard X-ray fainter than in quiescence (with a 
few exceptions, like U Gem). However, the hard X-ray enhancement 
episodes seen in SS Cyg have never been observed in other dwarf 
novae. We have proposed a hypothesis that this is related to the 
mass of the accreting white dwarf; only dwarf novae with a 
relatively massive white dwarf show the hard X-ray enhancement. 
If that's true, we may well see similar enhancement in RU Peg, 
which is thought to have a massive white dwarf. Even if this 
hypothesis is completely wrong, RU Peg is a good target for an 
SS Cyg-like campaign, since it's X-ray bright during quiescence.&quot;

Coordinates: RA 22 14 02.58  Dec +12 42 11.4  (2000.0)

Charts for RU Peg may be created using the AAVSO Variable Star
Plotter (http://www.aavso.org/vsp).

Please submit observations promptly to the AAVSO International
Database using the name RU PEG.

This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.
        </Value>
      </Param>
    </What>
    <WhereWhen xmlns="http://jabber.org/protocol/pubsub#event">
      <ObsDataLocation>
        <ObservatoryLocation id="TOPOCEN" />
        <ObservationLocation>
          <AstroCoordSystem id="UTC-FK5-TOPO" />
          <AstroCoords coord_system_id="UTC-FK5-TOPO">
            <Time unit="s">
              <TimeInstant>
                <ISOTime>
                  2012-06-06T13:36:25
                </ISOTime>
              </TimeInstant>
            </Time>
            <Position2D unit="deg">
              <Name1>
                RA
              </Name1>
              <Name2>
                Dec
              </Name2>
              <Value2>
                <C1>
                  333.51075
                </C1>
                <C2>
                  12.703166666667
                </C2>
              </Value2>
              <Error2Radius>
                0.0
              </Error2Radius>
            </Position2D>
          </AstroCoords>
        </ObservationLocation>
      </ObsDataLocation>
    </WhereWhen>
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