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CATEGORIES:Hills Coffee Talks
SUMMARY:Testing the HARPS3 Data Reduction Pipeline with Sy
 nthetic Spectra to achieve Earth-Twin RV Precision
  - Alicia Anderson (Cavendish Astrophysics)
DTSTART;TZID=Europe/London:20250513T111500
DTEND;TZID=Europe/London:20250513T120000
UID:TALK229495AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/229495
DESCRIPTION:The High Accuracy Radial velocity Planet Searcher-
 3 (HARPS3) is being developed for the Terra Huntin
 g Experiment\, a 10-year observing campaign to con
 duct nightly observations of a carefully selected 
 group of solar-like stars to detect long-period\, 
 low-mass exoplanets. The goal is to achieve extrem
 ely-precise radial velocity (EPRV) measurements at
  the level of 10 cm/s to enable the detection of a
 n Earth-twin. Attaining this precision requires a 
 deep understanding of all error sources: instrumen
 tal systematics\, astrophysical noise\, and data r
 eduction algorithms.\n\nTo address the latter\, I 
 have developed a novel method to test the data red
 uction pipeline (DRP) using synthetic data. Rather
  than attempting to replicate the instrument’s res
 ponse exactly\, the method is designed to systemat
 ically probe the DRP’s performance\, identify pote
 ntial biases\, and validate the reduction algorith
 ms. By injecting known inputs into the DRP and tra
 cing their propagation\, I can control all aspects
  of the data\, test specific algorithms\, and veri
 fy the accuracy of the reduction products. The aim
  is to use simulated data to identify systematic b
 iases and inaccuracies that could impact EPRV meas
 urements.\n\nIn this talk I will present my work\,
  currently in preparation for publication\, descri
 bing how I simulate the data and discussing the fi
 rst results of passing the synthetic echellogram t
 hrough the DRP. This approach provides a framework
  to assess the performance of HARPS3 during commis
 sioning and early operations - when it comes on-sk
 y in late 2025 - enabling us to identify issues an
 d refine data processing techniques.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
CONTACT:Charles Walker
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