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"18 results found.
- GRB 160104A: ISON-Ussuriysk optical observations
- GRB 160104A: Swift/UVOT Detection
- GRB 160104A: Continued MITSuME Akeno Optical Observation
- GRB 160104A: Nishi-Harima MINT Observations
- GRB 160104A: Spectroscopic observations from 10.4m GTC
- GRB 160104A: Swift-XRT refined Analysis
- GRB 160104A: Swift-BAT refined analysis
- GRB 160104A: Fermi GBM observation
- GRB 160104A: Mini-GWAC upper limit during prompt emission phase
- GRB 160104A: GWAC upper limit during prompt emission phase
- GRB 160104A: MITSuME Okayama upper limits
- GRB 160104A: Xinglong TNT optical observation
- GRB 160104A: Enhanced Swift-XRT position
- GRB 160104A: MASTER early OT detection
- GRB 160104A: MITSuME Okayama Ks-band upper-limit
- GRB 160104A: MITSuME Akeno Optical Observation
- GRB 160104A: LCOGT-FTN afterglow candidate
- GRB 160104A: Swift detection of a burst