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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#alertnotice453" 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>
        2012-02-23T12:07:00
      </Date>
    </Who>
    <Reference xmlns="http://jabber.org/protocol/pubsub#event" uri="http://www.aavso.org/publications_files/alerts/alert453.shtml" />
    <What xmlns="http://jabber.org/protocol/pubsub#event">
      <Param name="aavsoNumber" value="453" />
      <Param name="event" value="AAVSO Alert Notice 453: Monitoring of S Dor requested for multiwavelength campaign" />
      <Param ucd="meta.link.url" name="link" value="http://www.aavso.org/aavso-alert-notice-453">
        <Description>
          Link back to the AAVSO web page
        </Description>
      </Param>
      <Param ucd="meta.id" name="objectName" value="S Dor">
        <Description>
          Standard name for the astronomical object
        </Description>
      </Param>
      <Param dataType="float" ucd="phot.mag" name="magnitude" value="10.4">
        <Description>
          Approximate magnitude of the object.
        </Description>
      </Param>
      <Param name="body">
        <Value>
          Dr. Noel Richardson, Georgia State University, has requested 
monitoring of the luminous blue variable (LBV) prototype S Doradus 
as part of a multiwavelength campaign he is coordinating to study 
the photosphere of this star. At present the observations planned 
include:

1. UV Spectroscopy from HST
2. Optical spectroscopy from CTIO and an amateur in Australia
3. Near-IR Spectroscopy from SOAR (pending approval)
4. Mid-IR photometry from Gemini (pending approval)

While these observations will likely take place in May 2012, optical
monitoring beginning now is important. Your observations will not
only be very interesting but also necessary to correlate all of the 
observations and interpret the variability taking place in S Dor.
S Dor is particularly interesting at present because its current 
state allows the deepest look into its photosphere since the 1960s, 
leading to a better understanding of its stellar and wind 
properties. To quote Dr. Richardson, &quot;...the types of variability 
we are really wanting to probe are the long term trends and the 
decline to optical minimum it is going through.&quot;

Visual and photometric observations are requested on a nightly 
basis. BVRI photometry would be ideal, but any filter(s) would be 
very helpful. According to observations in the AAVSO International 
Database, S Dor is currently at visual magnitude ~10.4. Its decline 
from visual magnitude 9.2 began in 2006, with a more rapid decline 
starting in early 2010.

Coordinates: RA 05 18 14.35  Dec -69 15 01.1 (2000.0)

Charts may be created using VSP (http://www.aavso.org/vsp).

Please report observations to the AAVSO International Database 
using the name S DOR.

Your observations are key to the success of this campaign. If you 
have been observing S Dor, please continue. If you have not, and if
you can observe this far south, please add S Dor to your nightly 
list. Many thanks!

This AAVSO Alert Notice was prepared by Elizabeth O. Waagen.
        </Value>
      </Param>
    </What>
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      <ObsDataLocation>
        <ObservatoryLocation id="TOPOCEN" />
        <ObservationLocation>
          <AstroCoordSystem id="UTC-FK5-TOPO" />
          <AstroCoords coord_system_id="UTC-FK5-TOPO">
            <Time unit="s">
              <TimeInstant>
                <ISOTime>
                  2012-02-23T12:07:00
                </ISOTime>
              </TimeInstant>
            </Time>
            <Position2D unit="deg">
              <Name1>
                RA
              </Name1>
              <Name2>
                Dec
              </Name2>
              <Value2>
                <C1>
                  79.559791666667
                </C1>
                <C2>
                  -69.250305555556
                </C2>
              </Value2>
              <Error2Radius>
                0.0
              </Error2Radius>
            </Position2D>
          </AstroCoords>
        </ObservationLocation>
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