TOPCAT release

[Mark Taylor]

Hi topcat users,

this is to announce a new release of TOPCAT and gang:

   TOPCAT v4.6-2
   STILTS v3.1-5
   STIL   v3.3-2

There is a mixed bag of new features, enhancements and bug fixes 
this time round.  Highlights include:

   - The option to define subsets graphically by clicking on points
     to define a polygon (points may be inside, outside, above, below,
     left or right of marked region).  This is quite like the old
     blob-drawing mode, but instead of just marking rows as included
     or not, it gives you a subset defined by an algebraic function
     that you can e.g. reuse with other tables or report in a paper.

   - Additional Gaia-friendly astrometry functions, e.g.
     icrsToGal(astromUVW(array(ra, dec, parallax, pmra, pmdec, radial_velocity)))
     will calculate Cartesian components of velocity in galactic
     coordinates.

   - Improved capabilities for searching for values in table columns.

   - Single/bulk download activation action capabilities.

and so on.

The full lists of new and updated features, along with downloads and
documentaion etc, are in the usual places:

   http://www.starlink.ac.uk/topcat/
   http://www.starlink.ac.uk/stilts/
   http://www.starlink.ac.uk/stil/

All feedback welcome as always.

Thanks for your continuing support, and especially if you've been
citing TOPCAT/STILTS in published work - almost 200 already in 2018!:
http://adsabs.harvard.edu/cgi-bin/nph-ref_history?refs=CITATIONS&bibcode=2005ASPC..347...29T

Mark

--
Mark Taylor   Astronomical Programmer   Physics, Bristol University, UK
m.b.taylor at bris.ac.uk +44-117-9288776  http://www.star.bris.ac.uk/~mbt/