ADASSX

The Transients and Variable Stars Science Collaboration (TVS) for the Vera C. Rubin
Legacy Survey of Space and Time (LSST) includes a strikingly wide-range of researchers
and interest topics, from exoplanets to stellar variability of all kinds through to
extra-galactic transients such as Tidal Disruption Events. As a result, the community
also presents a wide range of requirements and challenges for the software tools needed
to accomplish these science goals. TVS has an active Software Group that aims to
facilitate the development of the necessary tools and to provide training opportunities
in key technologies.

TVS's groups for transient phenomena, ranging from microlensing to flares to
supernovae, are working with the developers of several brokers to produce filtered
alert streams to identify their targets of interest. Meanwhile, groups interested in
large-scale population analyses, or the detection of new stellar associations are
investigating optimal ways to perform very large catalog queries and/or bulk image
analysis. TVS' group searching for optical counterparts of gravitational wave or
neutrino detections are collaborating closely with Rubin project to establish protocols
for Rubin to perform a limited number of Target of Opportunity overrides.

The Science Collaboration is also the recipient of a number of directable software
contributions under Rubin's International In Kind program. These projects are
undertaken collaboratively to provide tools and services of general interest to TVS
members.

I will review ongoing software development efforts relating to TVS and In Kind
contributions.