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"19 results found.
- GRB 170317A: SAO RAS optical observations
- DOAO 1m telescope V, R, I observation of GRB 170317A
- GRB 170317A: 15 GHz upper limits from AMI
- GRB 170317A: Mondy optical observations
- GRB 170317A: POLAR observation
- GRB 170317A: RATIR Optical and NIR Observations
- GRB 170317A: RATIR Optical and NIR Observations
- GRB 170317A: LCO FTN observations
- GRB 170317A: MITSuME Okayama Optical Observation
- GRB 170317A: Swift-BAT refined analysis
- GRB 170317A: Swift/UVOT Detection
- GRB 170317A: Mondy optical observations
- GRB 170317A: MITSuME Okayama Ks-band upper-limit
- GRB 170317A: Swift-XRT refined Analysis
- GRB 170317A: GMG observation
- GRB 170317A : Xinglong TNT optical observation
- GRB 170317A: Enhanced Swift-XRT position
- GRB 170317A: ISON-Ussuriysk aferglow confirmation
- GRB 170317A: Swift detection of a burst with an optical counterpart