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.
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"
32 results found.
- GRB 221009A: Armchair Energetics
- GRB 180720B: Testing the universality of the newly born neutron star in BdHNe
- GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
- GRB 160625B: TSHAO optical observations
- GRB 160625B: RTT150 optical observations
- GRB 160625B: SAO RAS monitoring
- GRB 160625B: LCOGT FTN observations
- GRB 160625B: TSHAO optical observations, correction GCN 19619
- GRB 160625B: TSHAO optical observations
- GRB 160625B CALET Gamma-Ray Burst Monitor detection
- GRB 160625B: SMARTS optical/IR afterglow observations
- Pi of the Sky detection of an optical flash accompanying GRB 160625B
- GRB 160625B: Global MASTER-Net prompt optical emission detection
- GRB 160625B: SAO RAS optical observations
- GRB 160625B: 15 GHz detection from AMI
- GRB 160625B: VLA Detection
- GRB 160625B: TSHAO optical observations
- Konus-Wind observation of GRB 160625B
- GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
- GRB 160625B: RATIR Optical and NIR Observations
- GRB 160625B: TNG redshift confirmation
- GRB 160625B: VLT/X-shooter redshift
- GRB 160625B: MITSuME Ishigakijima Optical Observation
- GRB 160625A: Swift-BAT refined analysis
- GRB 160625B: Swift/UVOT Detection
- GRB 160625B: RATIR Optical and NIR Afterglow Detection
- GRB 160625B: Fermi GBM refined analysis
- GRB 160625B: Fermi-LAT refined analysis
- GRB 160625B: Swift-XRT afterglow detection
- GRB 160625B: Tiled Swift observations
- GRB 160625B: Fermi GBM initial observations
- GRB 160625B: Fermi-LAT detection of a bright burst