DOI:	10.7795/720.20211028
title:	Additional data for the publication "Improved Limits for Violations of Local Position Invariance from Atomic Clock Comparisons"
summary:	Data on measurements of the absolute transition frequency of the Yb+ E3 transition and measurements of the E3 and E2 Yb+ transition frequencies.
creators:	Lange, Richard, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID:0000-0002-9927-4858, 
	Huntemann, Nils, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0002-1876-0513, 
	Rahm, Johannes M., Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0002-4832-8043
	Sanner, Christian, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0002-9682-8237, 
	Shao, Hu, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0002-8739-4457, 
	Lipphardt, Burghard, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0001-7039-1914, 
	Tamm, Christian, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0002-4094-321X, 
	Weyers, Stefan, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0003-4484-6481
	Peik, Ekkehard, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0001-6309-2975
license:	CC-BY 4.0 International
keywords:	Optical clocks ; Frequency measurements ; Atomic structure
classification:	INSPEC A3200 Atomic spectra and interactions with photons ; INSPEC A3280P Photon interactions with atoms ; INSPEC A4262 Laser applications ; INSPEC A3580 Atomic and molecular measurements and techniques
Funding: European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Robust Optical Clocks for International Timescales, Grant Number: EMPIR 18SIB05 ROCIT, http://empir.npl.co.uk/rocit/
European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Coulomb Crystals for Clocks, Grant Number: EMPIR 17FUN07 CC4C, https://www.ptb.de/empir2018/cc4c/home/
Max Planck-RIKEN-PTB Center for Time, Constants and Fundamental Symmetries
related objects:	https://doi.org/10.1103/PhysRevLett.126.011102
software: The data is in ascii format, therefore no special software is required.
description of the individual files:	
Frequency ratio data as shown in figure 2: E3_E2_frequency_ratio_measurement
Absolute frequency data as shown in figure 3: E3_frequency_measurement.txt
Should be added:	This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.