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<H1 align=center>ALMA MEMO #492 <BR><BR>ALMA Calibration - Example of Scientific Impact </H1><BR><BR>
<H2 align=center>Chris Carilli<BR>National Radio Astronomy Observatory<BR><BR>2004-05-04 </H2><BR><BR>Keywords: ALMA calibration, gallaxies - star forming, high redshift, dust - spectral energy distribution<br>
<P>An example of the scientific impact of band-to-band calibration errors for ALMA is presented. The specific example entails constraining the temperature of a modified black body at high redshift.  This experiment is one of the key goals in the study of the dust obscured star formation history of the universe.  We find that 3% calibration errors between 250 and 350 GHz will constrain (at 3σ ) the temperature of a warm (~50 K) dust compnent to only 20°, while 10% calibration errors between 250 and 650 GHz provide a 3σ contraint of 10°. </P><BR>
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<P><EM>Last modified: 2004-05-07</P>
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