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"16 results found.
- Chandra late-time observations of GRB140515A
- GRB 140515A: Swift-BAT refined analysis
- GRB 140515A: VLA Detection
- GRB 140515A : TNG near-infrared observations
- GRB 140515A: GROND observation of the afterglow
- GRB 140515A: Spectroscopy from the 10.4m GTC
- GRB 140515A: Optical observations from the 2.5 m NOT
- GRB 140515A: Swift-XRT refined Analysis
- GRB 140515A: KAIT Optical Upper Limit
- GRB 140515A: Gemini-North imaging
- GRB 140515A: Swift/UVOT Upper Limits
- GRB 140515A: MITSuME Akeno upper limits
- GRB 140515A: Enhanced Swift-XRT position
- GRB 140515A: Gemini-N redshift
- Trigger 599041: Swift detection of SFXT IGR J16479-4514
- GRB 140515A: Swift detection of a burst