Details
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Type:
Story
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Status: Done
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Resolution: Done
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Fix Version/s: None
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Component/s: jointcal, meas_algorithms, meas_astrom
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Labels:
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Story Points:14
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Epic Link:
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Sprint:AP F18-2, AP F18-3, AP F18-4
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Team:Alert Production
Description
Neglect of proper motion in the reference catalog can cause zonal astrometric errors in wide-field surveys (Tholen, Micheli & Elliott 2013). We therefore require a means to transform reference catalog positions to the epoch of observation.
The PS1 PV3 catalog contains columns with the proper motions for RA and Dec in arcsec/year (pmRa, pmDec) with associated errors, and the mean epoch in seconds relative to the UNIX epoch (epoch). It would be good to support this scheme even if another is chosen.
Attachments
Issue Links
- is blocked by
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DM-15005 Add a new AngleUnit: milliarcseconds
- Done
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DM-15244 Change fluxSigma to fluxErr and similarly for apCorr and covariances
- Done
- is triggered by
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RFC-368 Include position errors in reference catalogs
- Implemented
- relates to
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DM-11998 Add required missing fields and errors to reference catalogs
- Invalid
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DM-8837 Reference catalog proper motions, parallaxes and errors
- Done
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RFC-271 Standardized schema for proper motions in reference catalogs
- Implemented
Would it be practical to add support for ingesting parallax on this same ticket (while deferring applying parallax to a different ticket)? The advantages I see are that the reference catalog schema and ingest will be finished (assuming we go with Robert's desire to not support radial velocity, which is not my first choice but seems acceptable). Naively, at least, it looks like very little additional work.