English: Partial graph of INTCAL13 data, showing variation in calibration curve results. The source for the underlying data 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 three columns of data from the given source -- calendar years before present, and radiocarbon years before present, plus the standard error, which is used to create the error lines adjacent to the main graph. There are two examples given, showing correct (t1) and incorrect (t2) ways to use the calibration error to derive a calendar year range. The layout of the graph is based on a diagram on page 101 of Aitken, M.J. (1990). Science-based dating in Archaeology. London: Longman. ISBN 0-582-49309-9