  This paper presents results of a survey of authors of journal articles
published over several decades in astronomy. The study focuses on determining
the characteristics and accessibility of data behind papers, referring to the
spectrum of raw and derived data that would be needed to validate the results
of a particular published article as a capsule of scientific knowledge.
Curating the data behind papers can arguably lead to new discoveries through
reuse. However, as shown through related research and confirmed by the results
of the present study, a fully accessible portrait of the data behind papers is
often unavailable. These findings have implications for reusability efforts and
are presented alongside a discussion of open science.
