# E2-light

Rows: 2. Files: E2-light.csv, E2-light.json (same rows).
Unit: 1 (gamma - 1).

Columns:
- value: measured value
- sigma: 1-sigma uncertainty, same unit
- source: publication (authors, journal, volume, page)
- year: year of publication
- provenance: where the lab first read the number (internal notes name the lab record; the primary source is the source column)
- pooled: yes: used in the combined value; no: shown as a cross-check only

Notes from the record:
- E2 light past the Sun. Quantity: gamma - 1, with the bending 2(1 + gamma)GM/(c^2 b) and the Shapiro delay (1 + gamma)(GM/c^3) ln(...).
- not pooled: Shapiro, Davis, Lebach, Gregory 2004 (PRL 92, 121101), gamma = 0.99983 +/- 0.00045, uses the 1979-1999 geodetic VLBI data inside the 2011 set

Source of the data: the publications in the source column.

Licence: Values are numerical results quoted from the cited publications; the publications themselves remain under their publishers' copyright and licences, and the numbers are reproduced here for scholarly citation, each with its source. This compilation (the selection, the columns and the notes): licence to be set by the author; CC BY 4.0 proposed.

sha256 of E2-light.csv: 942c2ebfe4a0daef8e5b88157394049482baa392a3be2f8296f3800cf65ed224
Record file last written: 2026-11-07 19:14:10 IST.