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marvellous!<br>
Edwin<br>
<br>
On 27-7-2011 2:10, Konrad Kuijken wrote:
<blockquote
cite="mid:C79C1CB1-7193-4A2F-B878-B3E749A75354@strw.leidenuniv.nl"
type="cite">Dear all:
<br>
<br>
some good news from Paranal!
<br>
I am analysing the latest set of focus runs, but meanwhile the
fwhm variation in these very good seeing images look very, very
small.
<br>
K
<br>
<br>
Begin forwarded message:
<br>
<br>
<blockquote type="cite">From: Pietro Schipani
<a class="moz-txt-link-rfc2396E" href="mailto:pietro.schipani@oacn.inaf.it"><pietro.schipani@oacn.inaf.it></a>
<br>
Date: July 27, 2011 12:54:27 GMT+02:00
<br>
To: Konrad Kuijken <a class="moz-txt-link-rfc2396E" href="mailto:kuijken@strw.leidenuniv.nl"><kuijken@strw.leidenuniv.nl></a>, Lothar
Noethe <a class="moz-txt-link-rfc2396E" href="mailto:lnoethe@eso.org"><lnoethe@eso.org></a>, Dietrich Baade
<a class="moz-txt-link-rfc2396E" href="mailto:dbaade@eso.org"><dbaade@eso.org></a>, Ueli Weilenmann
<a class="moz-txt-link-rfc2396E" href="mailto:uweilenm@eso.org"><uweilenm@eso.org></a>, Ricardo Parra <a class="moz-txt-link-rfc2396E" href="mailto:rparra@eso.org"><rparra@eso.org></a>,
Octavio Lavin <a class="moz-txt-link-rfc2396E" href="mailto:olavin@eso.org"><olavin@eso.org></a>, <a class="moz-txt-link-abbreviated" href="mailto:nhaddad@eso.org">nhaddad@eso.org</a>,
Muschielok Bernard <a class="moz-txt-link-rfc2396E" href="mailto:mbernard@usm.lmu.de"><mbernard@usm.lmu.de></a>, Andrea Baruffolo
<a class="moz-txt-link-rfc2396E" href="mailto:Andrea.Baruffolo@oapd.inaf.it"><Andrea.Baruffolo@oapd.inaf.it></a>, Thomas Szeifert
<a class="moz-txt-link-rfc2396E" href="mailto:tszeifer@eso.org"><tszeifer@eso.org></a>, Steffen Mieske <a class="moz-txt-link-rfc2396E" href="mailto:smieske@eso.org"><smieske@eso.org></a>
<br>
Cc: Massimo Capaccioli <a class="moz-txt-link-rfc2396E" href="mailto:mc@na.infn.it"><mc@na.infn.it></a>, Javier Argomedo
<a class="moz-txt-link-rfc2396E" href="mailto:argomedo@arcetri.astro.it"><argomedo@arcetri.astro.it></a>, Jacopo Farinato
<a class="moz-txt-link-rfc2396E" href="mailto:jacopo.farinato@oapd.inaf.it"><jacopo.farinato@oapd.inaf.it></a>, Gabriele Umbriaco
<a class="moz-txt-link-rfc2396E" href="mailto:gabriele.umbriaco@unipd.it"><gabriele.umbriaco@unipd.it></a>, Massimo Dall'Ora
<a class="moz-txt-link-rfc2396E" href="mailto:massimo.dallora@live.it"><massimo.dallora@live.it></a>, Sergio D'Orsi
<a class="moz-txt-link-rfc2396E" href="mailto:dorsis@oacn.inaf.it"><dorsis@oacn.inaf.it></a>, Laurent Marty
<a class="moz-txt-link-rfc2396E" href="mailto:laurent@oacn.inaf.it"><laurent@oacn.inaf.it></a>, Carmelo Arcidiacono
<a class="moz-txt-link-rfc2396E" href="mailto:carmelo@arcetri.astro.it"><carmelo@arcetri.astro.it></a>, Roberto Ragazzoni
<a class="moz-txt-link-rfc2396E" href="mailto:roberto.ragazzoni@oapd.inaf.it"><roberto.ragazzoni@oapd.inaf.it></a>, Demetrio Magrin
<a class="moz-txt-link-rfc2396E" href="mailto:demetrio.magrin@oapd.inaf.it"><demetrio.magrin@oapd.inaf.it></a>
<br>
Subject: shimming news
<br>
<br>
Dear all,
<br>
please find attached something you will probably appreciate.
<br>
The PSF anisotropies tonight were "flat" on the whole field,
with ellipticities of about 10% and a symmetric pattern which in
some cases well recalls the theoretical pattern described by
Lothar in his analysis. The FWHM have been always well below
the DIMM value (included in the title of the figures). The depth
of focus in terms of M2 positions measured by the focuser
scripts is roughly about 20-30 microns, i.e. more or less as
expected from theory. The results of new tilt measurements with
both Konrad's method and the Shack-Hartmann are as usual in
agreement and say the effect was reduced to negligible values.
<br>
We have just 1 night data, but now we know that, provided the AO
correction is good and the defocus is well controlled in the
middle of the mosaic, the images can be good in the whole 1 deg
^2. Therefore we can say it was worth to do the shimming. It has
been really a very hard and delicate job, involving many people
for many days and nights. I have to thank all my colleagues, the
ESO team who gave a massive help and produced the shims, the
OmegaCAM team who supported the operations.
<br>
Certainly I missed somebody in the list, sorry but it's time to
sleep...
<br>
See you soon,
<br>
Pietro
<br>
<br>
</blockquote>
<br>
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</blockquote>
<br>
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