[LSST|dm-astrometry #8] Re: update on the development of a simultaneous astrometry package

[Jim Bosch]

I think this looks like a great start, and I do think it'd be a good idea
to start integrating it into the stack as soon as possible (though might
depend on how much DM effort is available to help with that).  I mostly
agree with your ideas for other "next steps" - though I don't think proper
motion/parallax needs to be a top priority, and I do wonder how much work
it'd be to get better outlier rejection (would we have to write our own
custom low-rank Cholesky update?)

I imagine there will eventually be a lot of modification to what your
classes look like now in order to integrate them with existing LSST classes
with overlapping or related functionality.  But it might make the most
sense to just ignore most of that for now and just move this into a new
LSST package immediately, write some adapters to make it accept inputs from
the rest of the LSST pipeline, and then integrate those individual classes
one at a time later.


Jim



On Tue, May 19, 2015 at 11:32 AM, Pierre Astier <pierre.astier at in2p3.fr>
wrote:

> Hi,
>
>    Since our first phone conference about the development of a simultaneous
>  astrometry package, I have coded a fit and ran a couple of tests on
> exposure
> sets from the CFHTLS and Suprime cam. I have described the work and the
> first
> results in a few slides that you can find at:
> http://supernovae.in2p3.fr/~astier/sim-ast.pdf
>
>    I am mostly wondering whether this is enough to start discussing
> how we practically implement the algorithms into the stack.
>
> Pierre.
>
> --
> -------------------
> Pierre Astier , LPNHE, 12-22 1er étage.
> 4 place Jussieu, F 75252 Paris Cedex 05
> tel (33) 1 44 27 76 47  ---- fax (33) 1 44 27 46 38
>
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