Our first data science computing project will be to try to find a new
gravitationally-lensed Lyman-break galaxy for UW astronomer Christy
Tremonti.
<p>

  Here is background on our search:
  <ul>
    <li>Here is a toy <a href="targetNoiseShift.pdf">example</a> of a
      target spectrum of an astronomical object, a noisy version of
      the target, a shifted version of the target, and an unrelated
      spectrum. We want to find the second and third spectra from
      among many others.</li>
    <li><a href="https://en.wikipedia.org/wiki/Lyman-break_galaxy">Lyman-break galaxy</a> (1 page)</li>
    <li>Christy gave us a single target spectrum of a known Lyman-break
      galaxy
      called <a href="https://en.wikipedia.org/wiki/MS_1512-cB58">MS_1512-cB58</a>
      ("cB58") (1 sentence)
      <ul>
	<li><a href="https://www.google.com/sky/#latitude=31.2573066&longitude=40.6596495&zoom=10&Spitzer=0.00&ChandraXO=0.00&Galex=0.00&IRAS=0.00&WMAP=0.00&Cassini=0.00&slide=1&mI=-1&oI=-1">google
	    sky</a> (1 image: click "Constellations", zoom out, find
	    Big Dipper, follow arc to Arcturus, zoom back in) (may
	    need to use Safari to see constellations)</li>
	<li>go outside at night and look up: find Big Dipper, Arcturus,
	  and Bootes</li>
      </ul>
    </li>
    <li><a href="https://en.wikipedia.org/wiki/Gravitational_lens">Gravitational
	lens</a> (read 2 pages through the Description section)</li>
    <li><a href="https://en.wikipedia.org/wiki/Redshift">Red
    shift</a>, which is analogous to
    the <a href="https://en.wikipedia.org/wiki/Doppler_effect">Doppler
    effect</a> for sound
    </li>
    <li>We have the spectra of 2.5 million objects from
      the <a href="https://en.wikipedia.org/wiki/Sloan_Digital_Sky_Survey">Sloan
	Digital Sky Survey (SDSS)</a> (read 1 page, the introduction
      before the Observations section)</li>
    <li>Our job is to find those spectra most like cB58.</li>
    <li>Andrew
      Pontzen's <a href="Ponzen.mov">movie</a><!--http://www.cosmocrunch.co.uk/media/dla_credited.mov-->
      of a simulated redshifted spectrum developing as light from a quasar
      passes through gas clouds and a galaxy (24 seconds)
      <ul>
	<!--<li><a href="http://www.cosmocrunch.co.uk/?page=gal">Pontzen's
		   description</a> under "MAKING BEST USE OF OBSERVATIONS"</li>
	  -->
	<li><a href="movieComments">my comments</a></li>
      </ul>
    </li>
    <!--
       <li><a href="http://hubblesite.org/hubble_discoveries/science_year_in_review/pdf/2012/exploring_lyman_alpha_and_lyman_break_galaxies.pdf">Exploring Lyman-Alpha and Lyman-Break Galaxies</a> (NASA, 7 pages)</li>
       -->
  </ul>

<p>
  Let's brainstorm and discuss ideas on how to do this search. <!--
<a href="ideas.txt">our ideas</a>
-->