<?xml version="1.0" encoding="UTF-8"?>
  <VOEvent xmlns="http://www.ivoa.net/xml/VOEvent/v2.0" xmlns:voe="http://www.ivoa.net/xml/VOEvent/v2.0" version="2.0" role="observations" ivorn="ivo://archive.aavso/archive/voevents#specialnotice243" 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">
      Special 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>
        2011-06-07T16:08:45
      </Date>
    </Who>
    <Reference xmlns="http://jabber.org/protocol/pubsub#event" uri="http://www.aavso.org/publications_files/specialnotice/243.shtml" />
    <What xmlns="http://jabber.org/protocol/pubsub#event">
      <Param name="aavsoNumber" value="243" />
      <Param name="event" value="AAVSO Special Notice #243: Pre-SN 2011dh images of M51 requested" />
      <Param ucd="meta.link.url" name="link" value="http://www.aavso.org/aavso-special-notice-243">
        <Description>
          Link back to the AAVSO web page
        </Description>
      </Param>
      <Param ucd="meta.id" name="objectName" value="M51">
        <Description>
          Standard name for the astronomical object
        </Description>
      </Param>
      <Param dataType="float" ucd="phot.mag" name="magnitude" value="-">
        <Description>
          Approximate magnitude of the object.
        </Description>
      </Param>
      <Param name="body">
        <Value>
          Iair Arcavi and Avishay Gal-Yam (on behalf of the Palomar Transient 
Factory) write: 

&quot;[The discovery of SN 2011dh in M51] (see AAVSO Special Notices 
#241 (http://www.aavso.org/aavso-special-notice-241) and 
#242 (http://www.aavso.org/aavso-special-notice-242)) is a very 
exciting scientific discovery, to which amateurs can further 
significantly contribute! We at the Palomar Transient Factory seek 
more image data of M51 obtained between May 30 and June 2, 2011.
So, if you have imaged this galaxy using a telescope and a digital 
camera, your data may be very useful to this project!

&quot;Helpful data would be:
- images of M51 between 2011 May 30 and June 2
- only if it has an accurate time stamp

&quot;In case such data exist, please send the raw images, specify the 
filter(s) used, and if possible also send images of the same field 
taken with the same instrument and telescope before May 30, to:

ptf11eon@gmail.com 

&quot;Your help could be crucial for great scientific discoveries! We 
will not use any data without permission, and will of course credit
all useful images. Many thanks.&quot;


Coordinates of M51 (NGC 5194): RA 13 29 52.698 Dec +47 11 42.93 (J2000.0)


This AAVSO Special 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>
                  2011-06-07T16:08:45
                </ISOTime>
              </TimeInstant>
            </Time>
            <Position2D unit="deg">
              <Name1>
                RA
              </Name1>
              <Name2>
                Dec
              </Name2>
              <Value2>
                <C1>
                  202.469575
                </C1>
                <C2>
                  +47.195258333333
                </C2>
              </Value2>
              <Error2Radius>
                0.0
              </Error2Radius>
            </Position2D>
          </AstroCoords>
        </ObservationLocation>
      </ObsDataLocation>
    </WhereWhen>
  </VOEvent>