IAU Central Bureau for Astronomical Telegrams
International Astronomical Union Circulars
Central Bureau for Astronomical Telegrams
The International Astronomical Union Circulars (IAUCs) are a series of postcard notices giving information about astronomical phenomena requiring prompt dissemination, particularly the discovery and follow-up of novae, supernovae and comets. The IAUCs are also available in electronic form via e-mail or through the CBAT/MPC Computer Service. [Note that the printed IAUCs are considered "official" and final; the e-mailed versions are officially issued but are not the final version, because they are issued in ASCII form (and do not entail diacritical marks, Greek letters, and other aspects). Official citing should always be to the printed IAUCs, not the electronic versions.]
On-line IAUCs
are available, the newer ones by paid subscription only, and
many (but not
yet all) older ones freely available. Please ensure that
you have read this policy statement on the
availability of IAUCs.
IMPORTANT NOTE: When looking at the sample IAUCs below, please note that the
CBAT TWX number has been discontinued.
The available sample Circulars are:
Details
on how to subscribe to the IAUCs are available.
Sample IAUCs
Sample IAUCs are available showing a range of the material
covered. The sample Circulars are available in two forms:
in ASCII format as used in the e-mail version
in .dvi format as used in the printed version
