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').
12 results found.
- GRB 121211A: Continued RATIR Optical and NIR Observations, Fading
- GRB 121211A: Fermi GBM observation
- GRB 121211A: RATIR Optical and NIR Observations
- GRB 121211A: RAPTOR Limits During Gamma-Ray Emitting Interval
- GRB 121211A: Swift-BAT refined analysis
- GRB 121211A: Swift/UVOT Detection
- GRB 121211A: MITSuME Okayama Optical Observation
- GRB 121211A: Swift-XRT refined Analysis
- GRB 121211A: Enhanced Swift-XRT position
- GRB 121211A: Keck/LRIS redshift
- GRB 121211A - Faulkes Telescope North afterglow confirmation
- GRB 121211A: Swift detection of a burst with an optical counterpart