Re: It looks like the coords in (at least one of) the subtractions is off by almost 2 arcMINUTES.

From: Saul Perlmutter (saul@lbl.gov)
Date: Sun Apr 04 2004 - 00:26:34 PST

  • Next message: Robert A. Knop Jr.: "Subtractions with bad coordinates"

    ...We can try to hunt down the three remaining candidates from that
    first batch of subtractions (we'll let you know if we have problems
    finding them), but would it be possible for the remaining subtractions
    to have the right coords?

    Robert A. Knop Jr. wrote:

    >I think I may know what I did to screw that up. It's technical, but has
    >to do with the way the images are treated in the sum.
    >
    >The short of it: the WCS in the "sum" images will often (though not
    >necessarily always) be very *wrong*. This is in principle OK, since the
    >database and searchscan software doesn't use the WCS at all, but it's
    >own transformation structures.
    >
    >I think my mistake was in not realizing myself that the WCS was wrong,
    >and in generating the database transformation structures from the WCS
    >rather than doing it the right way (which is almost as easy).
    >
    >I will let you know shortly how many of them are wrong.
    >
    >Do you want me to do new subtractions to fix this problem?
    >
    >-Rob
    >
    >
    >

    This archive was generated by hypermail 2.1.4 : Sun Apr 04 2004 - 00:26:43 PST