I imagine this will have to wait until Peter gets back, but if there's
any other TST enthusiasts out there who want to chip in, feel free.
Section 11.1 of SSN/75.1 says:
\item By default, the first three columns in the table are: an identifier
(that is, an object name), Right Ascension and Declination. These
columns are usually called {\tt Id}, {\tt ra} and {\tt dec}
respectively.
\item If the first three columns of the table are not an identifier,
Right Ascension and Declination then the TST should contain the
following three parameters:
\begin{quote}
{\tt id\_col \\
ra\_col \\
dec\_col}
\end{quote}
The value of each parameter should be the number of the appropriate
column or, if there is no such column, {\tt -1}. The column number is the
sequence number of the column in the list of column names, starting
counting at zero.
However, if I write a TST table with the line
id_col: -1
then GAIA complains "Error: column index -1 out of range" and won't
plot the data. This looks like a GAIA/SkyCat bug, but it may be an error
in SSN/75. Either way, since it's presumably worked like that for
a while, I presume that most TSTs in the field avoid writing id_col: -1,
so for now I will try to do the same.
Mark
--
Mark Taylor Astronomical Programmer Physics, Bristol University, UK
[log in to unmask] +44-117-928-8776 http://www.star.bris.ac.uk/~mbt/
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