GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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"21526 results found.
- GRB041223: decay of the afterglow
- GRB041224: ROTSE-III Optical Observations
- GRB 041223: XRT afterglow spectrum and light curve
- GRB 041223 Fluence measured by Swift-BAT
- GRB041224: Swift-BAT detection of a soft burst
- GRB041223: optical and NIR observations with REM
- Swift-BAT Time History of GRB041219
- GRB 041223: Detection of Optical Transient with LCO40
- GRB041223: Swift XRT Detection of X-ray Afterglow Emission
- GRB041223: ROTSE-III Optical Observations
- GRB041223: Swift-BAT detection of a bright long burst
- GRB041220: Swift-BAT burst
- GRB 041219 Optical Observations
- GRB041219c: Third Burst in One Day from Swift-BAT
- GRB041219b: A Swift-BAT burst
- Swift-BAT detection of the bright long burst GRB041219
- GRB041217: optical limit 30 min after GRB
- GRB041217: Optical Observations
- GRB041217: NIR and optical observations with REM
- GRB041217: P60 Optical Observations
- GRB041217: Infrared Observations
- GRB041217: The First GRB Located On-Board Swift
- GRB040916: Optical observations
- GRB040422: optical and NIR observations at the VLT
- GRB040223, improved XMM position
- SN 2003jd (SN/GRB?) - possible association with GRB 030929