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"17 results found.
- GRB 070809: Putative host galaxy and redshift
- GRB 060801: Swift/XRT Astrometry Correction
- GRB060801: host galaxy redshift
- GRB 060801: Second Epoch WSRT Radio Observations
- GRB 060801: no variability of optical sources
- GRB 060801: WSRT Radio Observations
- GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
- GRB060801: Radio Observations
- GRB 060801: optical observations at FORS2/VLT
- GRB 060801: optical observations at Hanle and Calar Alto
- GRB060801: optical upper limit in R
- GRB 060801: Swift XRT refined analysis
- GRB 060801: Refined analysis of the Swift-BAT short hard burst
- GRB 060801, optical observation
- GRB 060801: Kanazawa Optical Observation
- GRB 060801: Swift detection of a short burst
- GRB 060108: VLT K-band observations