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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"15 results found.
- GRB 111123A: Keck-I host detection and VLT/X-shooter redshift
- GRB 111210A: MITSuME Okayama Optical upper limits
- GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
- GRB 111123A: optical upper limit in CrAO
- GRB 111123A, Swift-BAT refined analysis
- GRB 111123A: Swift/UVOT Upper Limits
- GRB 111123A - NOT optical observations
- GRB 111123A, GROND observations
- GRB 111123A: correction to GCN 12593
- GRB 111123A: TNG NIR detection of the afterglow candidate
- GRB 111123A: Swift-XRT refined Analysis
- GRB 111123A: MITSuME Okayama Optical upper limits
- GRB 111123A: Enhanced Swift-XRT position
- GRB 111123A: GMG optical observation
- GRB 111123A: Swift detection of a burst