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"619 results found.
- GRB011030 - further refinement WFC position
- GRB 011030, Radio observations
- GRB010220, Radio and Optical Observations
- GRB010213 (HETE) TAROT observations
- GRB 001109: deep JHK upper limits
- GRB 000301A, Radio Observations
- BEPPOSAX GRBM Localization of GRB991226
- IPN localization of GRB991226
- Optical Observations of GRB990627
- BeppoSAX NFI Observation of GRB980425
- GRB980425 Optical Follow-up
- GRB980425: X-ray revised positions
- GRB970519, optical follow-up at Schmidt Calern
- BSAX Observations of GRB980425 field
- GRB980425 BATSE observations
- GRB 980425 optical observations
- GRB980425: optical obs.
- GRB980425: Radio Observations
- GRB 980425 optical observations