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"20 results found.
- GRB 140304A: Suzaku WAM observation of the prompt emission
- GRB 140304A: Continued RATIR Optical and NIR Observations
- GRB 140304A: 10.4m GTC refined redshift z = 5.283
- GRB 140304A: MASTER OT light curve
- GRB 140304A: CARMA 3mm detection
- GRB 140304A: VLA Detection
- GRB 140304A: RATIR g-band Dropout
- GRB 140304A: Swift-BAT refined analysis
- GRB 140304A: Swift-XRT refined Analysis
- GRB 140304A: Enhanced Swift-XRT position
- GRB 140304A: Redshift from the NOT
- GRB 140304A: Fermi GBM detection
- GRB 140304A: 10.4m GTC redshift z = 5.39
- GRB 140304A: NOT observations and redshift estimate
- GRB 140304A: Swift/UVOT Upper Limits
- GRB 140304A: Khureltogot optical observations
- GRB 140304A: Mondy optical observations
- GRB 140304A: Afterglow decay from Nanshan observations
- GRB 140304A: Swift detection of a burst
- GRB 140304A: MASTER OT detecton