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"18 results found.
- Radio upper limits on the GRB 140703A with the GMRT
- GRB 140703A: AMI 15 GHz detection
- GRB 140703A: Swift/UVOT Upper Limits
- GRB 140703A: AAO optical observations
- GRB 140703A: VLA K-band detection
- GRB 140703A: CARMA 3mm detection
- GRB 140703A: P60 observations of a red, slowly-fading afterglow
- GRB 140703A: RATIR Optical and NIR Observations
- GRB 140703A: Fermi GBM detection
- GRB 140703A: Monte Agliale Observatory optical observations
- GRB 140703A: Swift-XRT refined Analysis
- GRB 140703A: Swift-BAT refined analysis
- Correction to GCN 16507: GRB 140703A!
- GRB 140703A: MASTER optical observations
- GRB 140703A: Enhanced Swift-XRT position
- GRB140703A: 10.4m GTC redshift
- GRB 140703A: BOOTES-2 and OSN optical observations
- GRB 140703A: Swift detection of a burst