The K correction
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The K correction "corrects" for the fact that sources observed at different redshifts are, in general, compared with standards or each other at different rest-frame wavelengths. It is part of the relation between the emitted- or rest-frame absolute magnitude of a source in one broad photometric bandpass to the observed-frame apparent magnitude of the same source in another broad bandpass. This short pedagogical paper provides definitions of and equations for the K correction.
This short and purely pedagogical text is not submitted anywhere but here. Errors reported to the authors will be rewarded with gratitude and acknowledgements
This short and purely pedagogical text is not submitted anywhere but here. Errors reported to the authors will be rewarded with gratitude and acknowledgements