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"15 results found.
- GRB 101020A: MASTER prompt and afterglow limit
- GRB 101020A: MASTER polarization optical observations
- GRB 101008A: correction to the GCN 11352
- GRB 101008A: optical observations
- GRB 101008A: Fermi GBM observation
- GRB 101008A: MASTER prompt optical observations (correction to GCN#11328)
- GRB 101008A: MASTER prompt optical observations
- GRB 101008A: Swift-BAT refined analysis
- GRB101008A, GROND detection of a fading afterglow
- GRB 101008A: Swift-XRT refined analysis
- GRB 101008A: SAO RAS optical observations
- GRB 101008A: Enhanced Swift-XRT position
- GRB 101008A: 1.23m CAHA optical observations
- GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
- GRB 101008A: Swift detection of a burst