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Imprecise radial velocities in NOVAS C 3.1 #49

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attipaci opened this issue Jul 30, 2024 · 0 comments · Fixed by #48
Closed

Imprecise radial velocities in NOVAS C 3.1 #49

attipaci opened this issue Jul 30, 2024 · 0 comments · Fixed by #48
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attipaci commented Jul 30, 2024

Radial velocities, as calculated in NOVAS C 3.1 (and previous SuperNOVAS) releases were not quite accurate because:

  1. it used the aberrated source position, whereas the radial velocity should be measured towards the geometric source direction. This resulted in a typical error at the tens of m/s level.
  2. it did not correctly account for the gravitational deflection in the radial velocity calculation. (What was done was in the wrong direction, and not quite right magnitude either). This resulted in a typical error at the few m/s level.

Both aspects will be corrected in v1.1

@attipaci attipaci added the bug Something isn't working label Jul 30, 2024
@attipaci attipaci added this to the 1.1.0 milestone Jul 30, 2024
@attipaci attipaci self-assigned this Jul 30, 2024
@attipaci attipaci linked a pull request Jul 30, 2024 that will close this issue
@attipaci attipaci changed the title Incorrect radial velocities in NOVAS C 3.1 Imprecise radial velocities in NOVAS C 3.1 Jul 31, 2024
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