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"20 results found.
- GRB 200729A: Lowell Discovery Telescope observations
- Konus-Wind detection of GRB 200729A
- GRB 200729A: RT-22 observations at 36.8 GHz
- GRB 200729A: VLA Observations
- GRB 200729A: Nanshan/NEXT optical upper limit
- GRB 200729A: Swift-BAT refined analysis
- GRB 200729A: further analysis of the NOT data
- GRB 200729A: Swift/UVOT Upper Limits
- GRB 200729A: Swift-XRT refined Analysis
- GRB 200729A: HST imaging
- Fermi-GBM Sub-Threshold candidate for GRB 200729A
- GRB 200729A: IceCube neutrino search
- GRB 200729A: Pan-STARRS pre-explosion source detection
- GRB 200729A: Spitzer archival source detection
- GRB 200729A: TNG NIR upper limits
- GRB 200729A: NOT optical upper limits
- GRB 200729A: Enhanced Swift-XRT position
- GRB200729A: BOOTES-1 optical upper limit
- Swift GRB 200729A: Global MASTER-Net observations report
- GRB 200729A: Swift detection of a burst