GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"16 results found.
- GRB 130131A: JCMT SCUBA-2 sub-mm observations
- GRB 130131A: MITSuME Akeno Optical upper limits
- GRB 130131A: optical observation in Mondy observatory
- GRB 130131A: Swift/UVOT Upper Limits
- GRB 130131A: RATIR optical and infrared upper limits
- GRB 130131A: RAPTOR Limits During Gamma-Ray Emitting Interval
- GRB 130131A - UKIRT confirmation of afterglow
- GRB 130131A: CARMA 3mm Observations
- GRB 130131A: VLA 5.8 Ghz Detection
- GRB 130131A: Swift-XRT refined Analysis
- GRB 130131A: MITSuME Okayama optical upper limits
- GRB 130131A: Swift-BAT refined analysis
- GRB 130131A: Enhanced Swift-XRT position
- GRB 130131A - Faulkes Telescope North Observations
- GRB 130131A - UKIRT afterglow candidate
- GRB 130131A: Swift detection of a burst