The Astronomer's Telegram (ATel) is an internet-based short-notice publication service for quickly disseminating information on new astronomical observations. Examples include gamma-ray bursts, gravitational microlensing, supernovae, novae, or X-ray transients, but there are no restrictions on content matter. Telegrams as available instantly on the service's website and distributed to subscribers via email digest within 24 hours. The Astronomer's Telegram was launched on 17 December 1997 by Robert E. Rutledge with the goal of rapidly (<1 s) sharing information of interest to astronomers. Telegrams are sent out daily by email, but especially time sensitive events can be transmitted instantly. Since 2013, information is also broadcast over Twitter and Facebook. More information...
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