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TESSCut may be confusing for high-proper motion objects #25

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barentsen opened this issue Nov 20, 2019 · 0 comments
Open

TESSCut may be confusing for high-proper motion objects #25

barentsen opened this issue Nov 20, 2019 · 0 comments
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bug Something isn't working Priority: Low Nice to have, but ultimately not needed TESScut Issues related to TESScut.

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@barentsen
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barentsen commented Nov 20, 2019

This may be a known issue, but I thought it'd be worth highlighting the following caveat:

TESSCut appears to resolve names to their J2000.0 position. For example, Proxima Cen:
Screenshot from 2019-11-20 13-57-49

This is a caveat because nearby stars such as Proxima Cen have a very large proper motion, so anyone clicking "Download FFI Cutout" after having entered the name of this target may be surprised to find that the object is not in the center of the TPF. This is because its high proper motion since J2000 has moved it slightly out of the cutout! Example for Proxima Cen:

proximacen-tesscut

This may not be important to fix, because it only affects a small number of high proper motion targets, but some solutions could be to:

  • have the TESSCut service automatically return the J2020.0 position;
  • highlight in the interface that the names resolve to J2000.0 positions; or
  • issue a warning if a name of a high-proper motion object is resolved.
@ceb8 ceb8 added TESScut Issues related to TESScut. bug Something isn't working Priority: Low Nice to have, but ultimately not needed labels Nov 22, 2019
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Labels
bug Something isn't working Priority: Low Nice to have, but ultimately not needed TESScut Issues related to TESScut.
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