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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"18 results found.
- GRB 111215A: Keck/LRIS Imaging
- GRB 111215A: EVLA observations
- GRB111215A: optical upper limit
- GRB 111215A: WHT, LT and NOT imaging
- GRB 111215A: TNG K-band observations
- GRB 111215A: MITSuME Okayama Optical upper limits
- GRB 111215A: Swift/UVOT Upper Limits
- GRB 111215A: Swift-XRT refined Analysis
- Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
- GRB 111215A: Enhanced Swift-XRT position
- GRB 111215A: Swift-BAT refined analysis
- GRB 111215A: OSN I-band observations
- GRB 111215A: MASTER-Net optical prompt and follow up observations
- GRB 111215A, Optical Observations
- GRB 111215A: MITSuME Akeno Optical upper limits
- GRB 111215A: GMG optical upper limit
- GRB 111215A : Xinglong TNT upper limit
- GRB 111215A: Swift detection of a burst