# Typesetting plus-minus uncertainties with different upper and lower bounds

I'm making a data table and need to include my error bars with my data. $\pm$ works great if the upper and lower bounds are the same, however, several of my data points has a different upper limit than lower. In papers I've read, I've seen plenty of uncertainties expressed as plus x minus y stacked on top of one another with the $\pm$ sign. Could someone tell me how to typeset such a thing?

I'm using a journal-specific document type (aastex) and the deluxetable coding.

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$1.23\substack{+0.4 \\ -0.5}$\,pb