Reference:	"Ugelow, M. S., De Haan, D. O., Hörst, S. M. and Tolbert, M. A. (2018) 'The Effect of Oxygen on Organic Haze Properties', The Astrophysical Journal Letters, 859:L2, 5 pp."
DOI:	"https://doi.org/10.3847/2041-8213/aac2c7"
Sample Type:	"Gas Tholin"
Composition:	"N₂:CH₄:CO₂:O₂ (99.798:0.1:0.1:0.002)"
Temperature:	"293K"
OCdb page:	"https://ocdb.smce.nasa.gov/dataset/Ugelow_2018_ApJL_dataset-4_gastholin_N2-CH4-CO2-O2_99.798-0.1-0.1-0.002_293K"
Annotations:	"Early Earth gas tholin sample produced from nitrogen:methane:carbon dioxide:oxygen (N₂:CH₄:CO₂:O₂ with a 99.798:0.1:0.1:0.002 ratio) gas precursors by UV photolysis at 293 K (20 °C) temperature and 620 Torr pressure at University of Colorado, Boulder, CO, USA.
Tholin sample produced as spherical particles with sizes ranging from 175 to 350 nm.
The real (n) and imaginary (k) parts of the complex index of refraction were determined from optical measurements done at a temperature of 293 K (20 °C) and a pressure of 620 Torr, by photoacoustic spectroscopy and cavity ringdown spectroscopy at λ = 405 nm. 
Error bars/uncertainties are provided in the downloadable data.
More information can be found in the publication and on the OCdb contributor's page."

"Wavelength"	"n₁"	"Error n₁  (+/-)"	 	"Wavelength"	"k₁"	"Error k₁  (+)"	"Error k₁  (-)"	 
nm		absolute	 	nm		absolute	absolute	 
405	1.67	0.03	 	405	0.002	0.003	0.002