Details

Type: RFC

Status: Implemented

Resolution: Done

Component/s: DM

Labels:None

Location:This RFC
Description
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from Paul Price following the lead of PanSTARRS, I propose the following column names and units.
pmRa  Proper motion in the RA coordinate (mas/yr; float32)

pmRaErr  Error in proper motion in the RA coordinate (mas/yr; float32)

pmDec  Proper motion in the Declination coordinate (mas/yr; float32)

pmDecErr  Error in proper motion in the Declination coordinate (mas/yr; float32)

epoch  Mean epoch (TAI MJD for which the position needs no proper motion correction; float64)

Note that the definitions above allow direct application of the proper motion correction by multiplying pmRa and pmDec by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to pmRa of cos(Dec) is required (or one could do the dot product in Cartesian 3space).
If pmRaErr or pmDecErr are missing, zero error will be assumed. If any of pmRa, pmDec, or epoch are missing, no proper motion correction will be applied.
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DM8837 Reference catalog proper motions, parallaxes and errors
 Done
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Description 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (arcsec/yr) pm_ra_err  Error in proper motion in the RA coordinate (arcsec/yr) pm_dec  Proper motion in the Declination coordinate (arcsec/yr) pm_dec_err  Error in proper motion in the Declination coordinate (arcsec/yr) epoch  Mean epoch (seconds relative to the UNIX epoch) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (arcsec/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (arcsec/yr; float32) pm_dec  Proper motion in the Declination coordinate (arcsec/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (arcsec/yr; float32) epoch  Mean epoch (seconds relative to the UNIX epoch; int64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
Description 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (arcsec/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (arcsec/yr; float32) pm_dec  Proper motion in the Declination coordinate (arcsec/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (arcsec/yr; float32) epoch  Mean epoch (seconds relative to the UNIX epoch; int64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (mas/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (mas/yr; float32) pm_dec  Proper motion in the Declination coordinate (mas/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (MJD (TAI) for which the position needs no proper motion correction; float32) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
Description 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (mas/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (mas/yr; float32) pm_dec  Proper motion in the Declination coordinate (mas/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (MJD (TAI) for which the position needs no proper motion correction; float32) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (mas/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (mas/yr; float32) pm_dec  Proper motion in the Declination coordinate (mas/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (MJD (TAI) for which the position needs no proper motion correction; float64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
Description 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (mas/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (mas/yr; float32) pm_dec  Proper motion in the Declination coordinate (mas/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (MJD (TAI) for which the position needs no proper motion correction; float64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (mas/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (mas/yr; float32) pm_dec  Proper motion in the Declination coordinate (mas/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (TAI MJD for which the position needs no proper motion correction; float64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
Resolution  Done [ 10000 ]  
Status  Proposed [ 10805 ]  Adopted [ 10806 ] 
Description 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pm_ra  Proper motion in the RA coordinate (mas/yr; float32) pm_ra_err  Error in proper motion in the RA coordinate (mas/yr; float32) pm_dec  Proper motion in the Declination coordinate (mas/yr; float32) pm_dec_err  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (TAI MJD for which the position needs no proper motion correction; float64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pm_ra}} and {{pm_dec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pm_ra}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pm_ra_err}} or {{pm_dec_err}} are missing, zero error will be assumed. If any of {{pm_ra}}, {{pm_dec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
We will need to apply proper motion corrections (when available) to our reference catalogs when generating astrometric solutions. We have no current standardized schema for these columns. Following suggestions from [~price] following the lead of PanSTARRS, I propose the following column names and units.
{noformat} pmRa  Proper motion in the RA coordinate (mas/yr; float32) pmRaErr  Error in proper motion in the RA coordinate (mas/yr; float32) pmDec  Proper motion in the Declination coordinate (mas/yr; float32) pmDecErr  Error in proper motion in the Declination coordinate (mas/yr; float32) epoch  Mean epoch (TAI MJD for which the position needs no proper motion correction; float64) {noformat} Note that the definitions above allow direct application of the proper motion correction by multiplying {{pmRa}} and {{pmDec}} by the difference in epoch in units of years. If the angular distance travelled is to be calculated a correction term to {{pmRa}} of {{cos(Dec)}} is required (or one could do the dot product in Cartesian 3space). If {{pmRaErr}} or {{pmDecErr}} are missing, zero error will be assumed. If any of {{pmRa}}, {{pmDec}}, or {{epoch}} are missing, no proper motion correction will be applied. 
Resolution  Done [ 10000 ]  
Status  Adopted [ 10806 ]  Flagged [ 10606 ] 
Risk Score  0 
Status  Flagged [ 10606 ]  Proposed [ 10805 ] 
Comment  [ Another question: what about covariance (correlation) for position and/or proper motion? Gaia provides a number of these, including RA/Dec and mixtures of that with proper motion. SDSS does not. ] 
Watchers  Jim Bosch, John Parejko, KianTat Lim, Paul Price, Russell Owen, Simon Krughoff, Tim Jenness [ Jim Bosch, John Parejko, KianTat Lim, Paul Price, Russell Owen, Simon Krughoff, Tim Jenness ]  Jim Bosch, John Parejko, KianTat Lim, Paul Price, Robert Lupton, Russell Owen, Simon Krughoff, Tim Jenness [ Jim Bosch, John Parejko, KianTat Lim, Paul Price, Robert Lupton, Russell Owen, Simon Krughoff, Tim Jenness ] 
Planned End  09/Jan/17 6:00 PM  20/Jul/18 11:00 PM 
Risk Score  0  1 
Assignee  Simon Krughoff [ krughoff ]  Russell Owen [ rowen ] 
Risk Score  1  0 
Status  Proposed [ 10805 ]  Adopted [ 10806 ] 
Resolution  Done [ 10000 ]  
Status  Adopted [ 10806 ]  Implemented [ 11105 ] 