Data for galaxy assymetry experiment

This page provides links to data files used in the experiment described in Photometric asymmetry between clockwise and counterclockwise spiral galaxies in SDSS <br>
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The files can be uploaded to CAS and then used to replicate the results of the experiment. For instance, comparing the r magnitude of the of the classes can be done with the following CAS query:<br>
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select avg(g) from PhotoObjAll, MyDB.cw where Objid=ID and g&gt;0 and ra&gt;90 and ra&lt;270 <br>
select stdev(g) from PhotoObjAll, MyDB.cw where Objid=ID and g&gt;0 and ra&gt;90 and ra&lt;270 <br>
select count(g) from PhotoObjAll, MyDB.cw where Objid=ID and g&gt;0 and ra&gt;90 and ra&lt;270 <br>
select avg(g) from PhotoObjAll, MyDB.ccw where Objid=ID and g&gt;0 and ra&gt;90 and ra&lt;270 <br>
select stdev(g) from PhotoObjAll, MyDB.ccw where Objid=ID and g&gt;0 and ra&gt;90 and ra&lt;270 <br>
select count(g) from PhotoObjAll, MyDB.ccw where Objid=ID and g&gt;0 and ra&gt;90 and ra&lt;270 <br>
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Then the t-test can be calculated using the mean, standard deviation, and number of samples of the two classes. The "g&gt;0" is added to avoid possible flag values such as "-9999". <br>
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Paper reference:<br>
Shamir, L., Photometric asymmetry between clockwise and counterclockwise spiral galaxies in SDSS, <em>PASA</em>, In Press, 2017.