File:Intcal 13 calibration curve.png

English: Graph of INTCAL13 data. The source is here, via the "intcal13.14c" link. The paper for which this is supplementary data is "IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP", by Paula J Reimer, Edouard Bard, Alex Bayliss, J Warren Beck, Paul G Blackwell, Christopher Bronk Ramsey, Caitlin E Buck, Hai Cheng, R Lawrence Edwards, Michael Friedrich, Pieter M Grootes, Thomas P Guilderson, Haflidi Haflidason, Irka Hajdas, Christine Hatté, Timothy J Heaton, Dirk L Hoffmann, Alan G Hogg, Konrad A Hughen, K Felix Kaiser, Bernd Kromer, Sturt W Manning, Mu Niu, Ron W Reimer, David A Richards, E Marian Scott, John R Southon, Richard A Staff, Christian S M Turney, Johannes van der Plicht, in Radiocarbon, Vol. 55, No. 4.". This paper should be cited when using this data or this graph. The graph uses the first two columns of data from the given source -- calendar years before present, and radiocarbon years before present, using the Libby half-life of 5568 years.