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"15 results found.
- GRB 140512A: Redshift from NOT
- GRB 140512A: MASTER prompt and afterglow optical observations
- Konus-Wind observation of GRB 140512A
- GRB 140512A: Continued UVOT Observations
- GRB 140512A: Fermi GBM detection
- GRB 140512A: Xinglong TNT optical observation
- GRB 140512A: Swift-BAT refined analysis
- GRB140512A : GROND observations
- GRB 140512A: Swift-XRT refined Analysis
- GRB 140512A: Enhanced Swift-XRT position
- GRB 140512A: Optical observations from the 2.5 m NOT
- GRB 140512A: Mondy optical detection
- GRB 140512A: MASTER OT decay and early light curve
- GRB 140512A: Swift detection of a burst with an optical counterpart
- GRB 140512A: MASTER optical observations